Thnx voor de tip!quote:Op dinsdag 6 januari 2015 21:15 schreef aloa het volgende:
Vanavond in nieuws uur http://nieuwsuur.nl/live/
Morgen ook op de kennis van nu: http://www.npowetenschap.(...)januari-ijsland.html
Toppiequote:Op dinsdag 6 januari 2015 21:15 schreef aloa het volgende:
Vanavond in nieuws uur http://nieuwsuur.nl/live/
Morgen ook op de kennis van nu: http://www.npowetenschap.(...)januari-ijsland.html
twitter:janinekrippner twitterde op donderdag 08-01-2015 om 17:45:03 Great image comparison of the Holuhraun lava field! Images from Jan 3 2015 and Sept 6 2014 http://t.co/lzr6lkFNMq http://t.co/7HKzE727Pc reageer retweet
twitter:AlisonGraetting twitterde op donderdag 08-01-2015 om 16:53:15 Beautiful labled features of #Nornahraun Lava Field Iceland from @NASA_EO from Jan 3 http://t.co/1HUYGcKoM4 http://t.co/4678Fywx2C reageer retweet
quote:There are changes taking place in harmonic tremor on the SIL stations closest to the eruption in Holuhraun. I don’t know what this means exactly, the best idea at the moment is that the eruption is either ending or getting less in power. It is hard to know for sure at this moment due to the bad weather in Iceland. This might also just be part of normal fluctuation of the eruption.
quote:• Insubstantial changes have been in the volcanic eruption in Holuhraun over the last few weeks. The eruption is now well visible on web cameras and the activity appears to be similar to preceding weeks.
• Seismic activity in Bardarbunga continues to be strong, but it has though somewhat decreased. Total number of earthquakes in Bardarbunga from the last meeting of the board, on the 6 of January, is just over 100. Just over 10 earthquakes were between M4,0-5,0. The strongest one was M5,1 yesterday, 8. December, at 18:47. Few earthquakes were detected in the dyke of the same period, all of them smaller then M2,0.
• GPS measurements near northern Vatnajokull glacier show continuing slow deflation towards Bardarbunga. The rate of the deflation continues to slow down.
• The GPS station in Bardarbunga caldera show that the caldera continues to subside. The rate of the subsidence continues to slow down and is now between 10-15 cm per day.
twitter:janinekrippner twitterde op vrijdag 09-01-2015 om 11:55:36 Holuhraun lava field now 83.8 km². Thermal and radar images show current active areas http://t.co/M7lLGw3s6X #volcano http://t.co/NYe8Fmo5pc reageer retweet
twitter:janinekrippner twitterde op maandag 12-01-2015 om 16:38:11 More incredible images of Holuhraun from http://t.co/e3YHhIOEtI #volcano http://t.co/lg51ep0PIJ http://t.co/BM4cnWgVDl reageer retweet
quote:• Insubstantial changes have been in the volcanic eruption in Holuhraun over the last few weeks. Although the power of the eruption has diminished, it is still quite forceful. The flow of lava is now largely under the surface of solidified lava.
• Seismic activity in Bardarbunga continues to be strong, but it has though somewhat decreased. The largest earthquake since the last meeting of the Advisory Board was of magnitude M4,7 on Saturday, 10 of January at 18:23. In total 16 earthquakes were recorded of the period between magnitude M4,0-5,0 and 13 between M3,0- 4,0. Over 20 earthquakes were detected in the dyke of the same period, all of them smaller then M2,0.
• Six earthquakes were detected in Tungnafellsjokull glacier since Friday. The biggest was M2,1 tonight, January 13 at 04:21. Around 20 earthquakes were detected around Herdubreid, all smaller then M2,0.
• GPS measurements near northern Vatnajokull glacier show continuing slow deflation towards Bardarbunga.
• The GPS station in Bardarbunga caldera show that the caldera continues to subside.
• Indications are of increased respiratory symptoms in Iceland over the period of the volcanic eruption. No serious cases have though been reported.
• High values of sulphuric dioxide are still being recorded. Over the weekend high values were recorded in Hofn (3400 µ/m³) in Reydarfjordur (1000 µ/m³) and in Jokuldal (7800 µ/m³).
twitter:janinekrippner twitterde op dinsdag 13-01-2015 om 16:34:00 Awesome video taken over Holuhraun this past weekend! #volcano http://t.co/ZHQ1cRdOta http://t.co/NWhCId9a34 reageer retweet
twitter:janinekrippner twitterde op dinsdag 13-01-2015 om 16:22:17 Iceland's Holuhraun crater now ~100x400 m & 100 m high - can hold 4 football pitches! #volcano http://t.co/SNxrfOiEUo http://t.co/oSdU4PYzn2 reageer retweet
twitter:LGawenda twitterde op dinsdag 13-01-2015 om 17:22:57 Currently 84 km² #lava field #Holuhraun #Bardarbunga #volcano #eruption #Iceland #ashtag - http://t.co/uDoTkaRDLQ http://t.co/D4Bd7URnB6 reageer retweet
twitter:janinekrippner twitterde op woensdag 14-01-2015 om 15:29:46 Stunning photos of the Holuhraun eruption in Iceland http://t.co/TR5Srk0nyj #volcano http://t.co/TTvpOcoRwW reageer retweet
quote:• Insubstantial changes have been in the volcanic eruption in Holuhraun over the last few weeks. Volume of the lava flow, over the last few weeks, is estimated 50-70 cubic meters per second.
• Seismic activity in Bardarbunga continues to be strong. Over the last few weeks it has though been quite weaker than in the first months of the event. Three earthquakes of magnitude M4,6 were detected since the last meeting of the Advisory Board on Tuesday, 13. January. Sixteen earthquakes were detected between magnitude M4,0-5,0 during that period and in total around 150 earthquakes were detected.
• Around 40 earthquakes were detected in the dyke during the same period, all of them smaller then M2,0.
• Around 20 earthquakes were detected in Tungnafellsjokull glacier since last Tuesday. The strongest one was M3,1 on January 13 at 13:17. Friday. Around 20 earthquakes were detected around Herdubreid, the strongest one was M2,3.
• GPS measurements near northern Vatnajokull glacier show continuing slow deflation towards Bardarbunga.
• The GPS station in Bardarbunga caldera is not transmitting any data at the moment. A repair mission is being organised to get the station back on-line.
• High values of sulphuric dioxide are still being recorded.
twitter:janinekrippner twitterde op zondag 18-01-2015 om 16:03:32 The Holuhraun lava field is the size of Manhattan, and is going to get a new name http://t.co/ReiBvIbUMQ #volcano http://t.co/UPBzeqn25W reageer retweet
twitter:janinekrippner twitterde op maandag 19-01-2015 om 11:47:26 Wow that thing is huge! Holuhraun lava field in Iceland via. @uni_iceland: (via IMO) http://t.co/oJSI48b7mZ #volcano reageer retweet
twitter:uni_iceland twitterde op maandag 19-01-2015 om 11:12:17 This pic was taken Jan. 17 by police officers in #Holuhraun On Jan. 18, the sign was buried by the lava #verycool http://t.co/14CcAHifXN reageer retweet
twitter:subglacial twitterde op maandag 19-01-2015 om 13:12:08 #Iceland's rapidly changing enviroenment. My July 2012 gravity station was buried by #Holuhraun lava on 18 Jan 2015. http://t.co/NpGDjkTVK3 reageer retweet
twitter:uni_iceland twitterde op maandag 19-01-2015 om 11:16:22 Iceland finally lives up to its name! #Holuhraun easily visible. Lake Þingvallavatn to the left (via IMO) http://t.co/XJ5ZgYBgBQ reageer retweet
Dan moet je kijken of je een heli vlucht kan pakken langs de vulkaan op. Gezien de foto's en filmpjes die ik gezien heb moet dat de moeite waard zijn.quote:Op woensdag 21 januari 2015 16:09 schreef Leipo666 het volgende:
TVP, misschien zien we nog wat moois als we hier dit jaar naartoe op vakantie gaan
De eruptie zou dus mogelijk mischien in maart zou kunnen ophouden.twitter:volcan01010 twitterde op woensdag 21-01-2015 om 17:39:23 Haraldur Sigurðsson extrapolates #Bardarbunga caldera subsidence data + predicts #Holuhraun eruption end March 2015 http://t.co/87a6Pvkk5a reageer retweet
quote:Op donderdag 22 januari 2015 10:24 schreef bwt het volgende:De eruptie zou dus mogelijk mischien in maart zou kunnen ophouden.twitter:volcan01010 twitterde op woensdag 21-01-2015 om 17:39:23 Haraldur Sigurðsson extrapolates #Bardarbunga caldera subsidence data + predicts #Holuhraun eruption end March 2015 http://t.co/87a6Pvkk5a reageer retweet
Factsheettwitter:almannavarnir twitterde op vrijdag 23-01-2015 om 14:01:45 Notes from the Scientific Advisory Board http://t.co/79j3EC12g2 og á Ísl http://t.co/2RxK5pJNuH #Bardarbunga #Holuhraun reageer retweet
quote:• Insubstantial changes have been in the volcanic eruption in Holuhraun over the last few weeks. The lava field has thickened substantially but activity on the surface has decreased.
• The subsidence in Bardarbunga caldera was measured from air on Wednesday. The volume of the subsidence is now 1.7-1.8 km3. The change in volume from the last measurement corresponds to a flow of magma from underneath Bardarbunga of about 60 m3 per second. The greatest subsidence is now about 61 meters. Over the last few weeks the geothermal cauldrons in Bardarbunga have enlarged.
• Seismic activity in Bardarbunga continues to be strong. Over the last few weeks it has though been quite weaker than in the first months of the event. No earthquake over M5,0 has been detected in Bardarbunga for 15 days, which is the longest period between M5,0 earthquakes since the seismic activity started in August. The strongest earthquake since the last meeting of the Advisory Board on Tuesday was measured M4,7 yesterday at 03:07. Eight other earthquakes between magnitude M4,0-4,7 were detected over the period and about 37 earthquakes between M3,0-4,0. In total around 150 earthquakes have been detected around the caldera since last Tuesday.
• Around 65 earthquakes were detected in the dyke during the same period, the strongest one was measured M1,5.
• Insubstantial earthquake activity was detected in Tungnafellsjokull, Askja and Herdubreid.
• GPS measurements near northern Vatnajokull glacier show continuing slow deflation towards Bardarbunga.
• Around 2200 µg/m3 SO2 were recorded on Thursday in Reykjahlid and at lake Myvatn. Very high values of SO2, about 84000 µg/m3, were recorded at the eruption site in Holuhraun on Wednesday, being the highest values recorded at ground level since the eruption started.
quote:• The volcanic eruption in Holuhraun continues. Visible intensity of the eruption was low on last Wednesday while various observations were done at the eruption site. Comprehensive cross-section measurements from air (on 30. December and 21. January) show however that the lava field has thickened substantially during these three weeks and that the volume of the lava field is now little less than 1.4 km3. The flow of magma, during this period, was just under 100 m3 per second. The intensity of the eruption is there for slowly decreasing but hopefully it will be possible to measure the volume of the lava field again later this week, which will give new numbers on the flow of magma.
• Seismic activity in Bardarbunga continues to be strong. Eight earthquakes between M4.0-4.9 have been detected since the last meeting of the Advisory Board on Friday. The strongest one was measured M4.9 on Saturday, 24. January at 07:25. About 40 earthquakes between magnitudes M3.0-3.9 were detected over the period. In total around 150 earthquakes have been detected around the caldera since last Friday. No earthquake over M5,0 has been detected in Bardarbunga since 8. January.
• Around 50 earthquakes were detected in the dyke during the same period. Most of them were under M1.0 but the strongest one was M1.6 on 24. January.
• GPS measurements near northern Vatnajokull glacier show continuing slow deflation towards Bardarbunga.
twitter:volcanofile twitterde op maandag 26-01-2015 om 22:44:16 Marked further decline of activity at #Nornahraun. Report compiled by @uni_iceland volcanologists: http://t.co/UFoYrOwUHL MT @alexwitze reageer retweet
aan hoeveel moet je dan denken?quote:Op dinsdag 27 januari 2015 16:21 schreef 1boefje het volgende:
Ik ga 26 februari, maar ipv een helicoptervlucht heb ik besloten een dag te paardrijden.
De prijzen met een helicopter vanaf Reykjavik zijn abnormaal om het vanuit de lucht te zien.
Ik heb het in Hawaii al vanuit de lucht gezien, dus zie het niet als meerwaarde.
Hoe dan ook, ik ga weer naar mijn geliefde landje, voor de 3e keer
twitter:jonfr500 twitterde op vrijdag 30-01-2015 om 01:26:06 Possible minor eruption in Bárðarbunga volcano caldera, under the glacier. http://t.co/GprS5q5u59 reageer retweet
twitter:uni_iceland twitterde op zondag 01-02-2015 om 15:31:21 #Bardarbunga 2014- = 1.3 km3 #Grímsvötn 2011 = 0.25 km3 #Eyjafjallajökull 2010 = 0.16 km3 Thankfully the ongoing eruption isn't subglacial reageer retweet
En de feed/viewquote:Op dinsdag 3 februari 2015 09:35 schreef Frutsel het volgende:
'Game of Drones'.... by Ginger Zee
http://icelandreview.com/(...)live-holuhraun-today
http://hraun.vedur.is/ja/Bardarb/BARC/quote:• The volcanic eruption in Holuhraun continues. A visible reduction has been on the eruption in the last two weeks.
• Seismic activity in Bardarbunga continues to be strong. The strongest earthquake since the last meeting of the Advisory Board on Tuesday was measured M4.9 tonight at 03:48. Two other earthquakes stronger than M4,0 were detected since Tuesday, one was M4,5 and the other M4,0. About 10 earthquakes between magnitudes M3.0-3.9 were detected over the period. In total around 110 earthquakes were detected around the caldera since last Tuesday. No earthquake over M5,0 has been detected in Bardarbunga since 8. January.
• Around 20 earthquakes were detected in the dyke during the same period. The strongest one was M1.8.
• GPS measurements near northern Vatnajokull glacier show continuing slow deflation towards Bardarbunga.
• The highest levels of sulphuric dioxide since Tuesday, 3rd of February, 800 µg/m³ SO2 was measured in Vopnafjordur on Tuesday.
• A new risk analysis for the area around the eruption site is being conducted. The new risk map for the area will be issued next week.
• A team of technicians from The Icelandic Met Office, Institute of Earth Sciences UI, and The Department of Civil Protection have been working on maintenance on measuring equipment’s on Vatnajokull glacier and in the surrounding area. The GPS station in the Bardarbunga caldera is back on-line and will be visible on the IMO web site as before.
Voor helicoptervluchten askja.nlquote:
quote:Notes
• The volcanic eruption in Holuhraun continues. No scientists are in the area because of bad weather.
• Seismic activity in Bardarbunga continues to be strong. The strongest earthquake since the last meeting of the Advisory Board on Tuesday was measured M4.7 tonight at 03:18. Two other earthquakes stronger than M4.0 were detected since Friday, one was M4.1 on Saturday at 07:05, and the other M4.0, also on Saturday but at 04:00. About 10 earthquakes between magnitudes M3.0-3.9 were detected over the period. In total around 60 earthquakes were detected around the caldera since last Friday. No earthquake over M5.0 has been detected in Bardarbunga since 8. January.
• Around 30 earthquakes were detected in the dyke during the same period. The strongest one was M2.0 on Saturday at 20:35.
• The GPS station in the Bardarbunga caldera is back on-line and is visible on the IMO web site.
• GPS measurements near northern Vatnajokull glacier show continuing slow deflation towards Bardarbunga. A detectable errors are in the GPS measurements due to bad weather conditions over the last few days.
• A new risk analysis for the area around the eruption site is being conducted. The new risk map for the area will be issued this week.
• A team of scientists has been monitoring pollution in rainwater, snow and melt water since the eruption started. The team is planning to collect samples on Vatnajokull glacier and on mountain tops in Eastern Iceland. Chemical composition of rainwater around Iceland is also being monitored.
quote:Notes
• The volcanic eruption in Holuhraun continues. The eruption is still strong although it continues to diminish.
• Seismic activity in Bárðarbunga continues to be strong. The strongest earthquake since the last meeting of the Advisory Board on Friday was measured M4.5 on Friday, 13th of February, at 21:22. Two other earthquakes stronger then magnitudes M4.0 were detected over the period and three between M3.0-3.9. In total around 70 earthquakes were detected around the caldera since last Friday. No earthquake over M5.0 has been detected in Bárðarbunga since 8. January.
• Around 60 earthquakes were detected in the dyke during the same period. All smaller than M2.0.
• GPS measurements near northern Vatnajökull glacier show continuing slow deflation towards Bárðarbunga.
• About 40 earthquakes were detected around Herðubreið and Herðubreiðartögl since Friday. The strongest was M2.0 yesterday at 03:39. About 10 earthquakes were detected around Askja and three in Tungnafellsjökull.
twitter:jonfr500 twitterde op donderdag 19-02-2015 om 02:35:56 There is a bad signal on SIL stations around Vatnajökull. I am monitoring it. reageer retweet
quote:Notes
• The volcanic eruption in Holuhraun continues, but it has diminished substantially over the last few weeks. Visual activity in the crater has decreased and the lava field is hardly increasing in size.
• Seismic activity in Bárðarbunga continues to diminish although it can still be considered strong. The strongest earthquake since Tuesday was measured M4.3 at 01:26 yesterday. Two other earthquakes stronger then magnitudes M3.0 were detected over the period. In total around 70 earthquakes were detected around the caldera since last Tuesday. No earthquake over M5.0 has been detected in Bárðarbunga since 8. January. A distinct pulse of earthquakes occurred yesterday between 01:25 and 02:10. Time intervals between such pulses have significantly increased from 2-4 hours in the beginning to 12-24 hours or more at the moment.
• Around 65 earthquakes were detected in the dyke during the same period. The strongest one was measured M1.6 today at 08:24 in Dyngjujökull glacier.
• The rate of the subsidence in Bárðarbunga caldera had decreased substantially. But that is not the whole story. Ice is subsiding into the caldera with the effect that the GPS station does not show any changes. The estimated depression of the rock foundation of the caldera, in the light of the ice subsidence, is about 5 cm per day. The flow of magma from under Bárðarbunga is believed to be 25-30 m3 per second, which is about one tenth of the flow in September last year.
• GPS measurements near Vatnajökull glacier show continuing slow deflation towards Bárðarbunga, indicating a flow of magma from under the volcano.
• About 7 earthquakes were detected around Askja and 15 around Herðubreið since last Tuesday. All of them smaller than M1.5.
twitter:janinekrippner twitterde op vrijdag 20-02-2015 om 18:46:57 Lava break out/squeeze out at Holuhraun, Iceland. 17/18 Feb #volcano http://t.co/vLOc7XdTR8 http://t.co/Y8RdcmFDGb reageer retweet
twitter:janinekrippner twitterde op vrijdag 20-02-2015 om 18:57:22 FLIR Thermal image showing one active vent at Holuhraun remaining http://t.co/K0je3ueUuP #volcano http://t.co/QuesMzBWw3 reageer retweet
twitter:volcan01010 twitterde op maandag 23-02-2015 om 15:32:17 #Bardarbunga EQs seem to be fading out. Last EQ >M5 was 8 Jan. Last EQ >M3 was Saturday afternoon. http://t.co/L7MR6tZgbO #Holuhraun reageer retweet
twitter:Sim0nRedfern twitterde op dinsdag 24-02-2015 om 08:58:39 #holuhraun #bardarbunga standing out dark in Iceland's central highlands http://t.co/mXgXsaa1XB reageer retweet
haha, mooi stukquote:Op woensdag 25 februari 2015 12:34 schreef LTVDK het volgende:
Mede met dank aan dit topic en de tips van bwt heb ik een special geschreven over deze pracht der natuur: Bárdarbunga
(jaja, ik kom het hier even spammen )
Teruggespamdquote:Op woensdag 25 februari 2015 15:20 schreef Frutsel het volgende:
[..]
haha, mooi stuk
spam ook eens andersom
goed bezig!quote:Op woensdag 25 februari 2015 12:34 schreef LTVDK het volgende:
Mede met dank aan dit topic en de tips van bwt heb ik een special geschreven over deze pracht der natuur: Bárdarbunga
(jaja, ik kom het hier even spammen )
twitter:HTuffen twitterde op woensdag 25-02-2015 om 16:47:07 Dwindling seismic activity at #Bárdarbunga reaches a new low: now no M>2 events in last 48 hours http://t.co/cU3nTAZky8 reageer retweet
Voor de videotwitter:jonfr500 twitterde op vrijdag 27-02-2015 om 20:16:27 No lava flow visible in Holhraun main crater. http://t.co/DGLBTbhcAM reageer retweet
twitter:almannavarnir twitterde op zaterdag 28-02-2015 om 13:13:36 The volcanic eruption in Holuhraun has come to an end. See http://t.co/hvpF3n1DcD og á Ísl http://t.co/2RxK5pscmD #bardarbunga #Holuhraun reageer retweet
twitter:Sim0nRedfern twitterde op zaterdag 28-02-2015 om 13:10:54 #Holuhraun becomes a memory http://t.co/yRCpQSVUbd - thanks for the memory! http://t.co/W87wj9hnxE reageer retweet
Als het een voorspellende gave is zou ik een hoop wereldproblemen kunnen oplossen .quote:Op zondag 1 maart 2015 00:28 schreef Frutsel het volgende:
Heeft fok net zijn special klaar kapt dat ding dr mee
Prutsvulkaan
Ik had niet voor niks afgesloten met een onheilspellende zinquote:Op zondag 1 maart 2015 18:08 schreef bwt het volgende:
Nu dat ding dicht zit kan er weer wat druk worden opgebouwd..............
quote:Maar voorlopig lijkt Bárdarbunga zich een beetje te kalmeren. Al kan het natuurlijk ook zijn dat hij druk aan het opbouwen is...
twitter:AlisonGraetting twitterde op maandag 09-03-2015 om 19:54:07 Nice annotation of #Holuhraun Crater images from IMO team by @eruptionsblog http://t.co/YTjpYblTvH http://t.co/iR0YXGk9ar reageer retweet
quote:Volcanologist: Bárðarbunga Caldera Starts Rising Again
Volcanologist Haraldur Sigurðsson, who predicted the end of the Holuhraun eruption with remarkable accuracy, wrote on his blog yesterday that there are indications that the caldera of Bárðarbunga volcano, which fed the Holuhraun eruption, has begun rising again.
The rising of the caldera could mean that magma is accumulating in the magma chamber, building pressure, which might eventually lead to another eruption.
“When the subsidence [of the caldera] stopped, the curve of the position of the GPS sensor in Bárðarbunga had become horizontal. In the accompanying graph from the Icelandic Met Office’s website a blue curve shows none or insignificant horizontal movement on the surface of Bárðarbunga from February 7 to March 7,” Haraldur writes.
“I added a red line for comparison [see Haraldur’s blog]. It clearly shows that in the past days, the GPS sensor has started rising again. It can be caused by two things: (A) The ice below the sensor is flowing into the depression … (B) The caldera has started rising again because magma from the mantle is flowing into the magma chamber below Bárðarbunga.”
“I’m inclined to believe the latter explanation, but time will tell. If (B) is correct, it is likely that the flow of magma from the depths into the magma chamber will take many years before it reaches the position which Bárðarbunga had before the eruption which began in 2014,” Haraldur concluded.
Other scientists have predicted that Bárðarbunga will erupt again in the near future and that the eruption in Holuhraun was the first in a series.
The eruption carried on while the caldera subsided and magma flowed out of the magma chamber and into the intrusive dike connecting Bárðarbunga, which lies under Vatnajökull glacier, with Holuhraun north of the glacier.
Using data from a GPS sensor in the caldera, Haraldur and his grandson Gabríel Sölvi calculated the rate of the subsidence and when it would stop, which would mean that magma had stopped flowing into the intrusive dike and hence that the eruption had ended.
They had predicted that this would happen on March 4, while the eruption ended on February 27—they were off by five days.
quote:What is going to happen next in Bardarbunga?
It has been few days since the eruption in Holuhraun has ended and everything is quiet for the moment in Bárðarbunga volcano. What is going to happen next is a big question and nobody has the exact answer. Here are few options.
1.Nothing is going to happen. The rift is going to continue without more eruptions.
2.New magma intrusion is going to start soon in Bárðarbunga volcano. New eruption is going to start days to weeks later.
3.There is also high risk in my view of eruptions in Hamarinn volcano (also called Loki-Fögrufjöll). That volcano system is inside Bárðarbunga volcano and dyke intrusion from Bárðarbunga to the south might start a volcano eruption in it. I don’t know how big such eruption would be, it is my estimate. Dyke to Torfajökull volcano is unlikely to happen. I however cannot rule it out at this point.
What is going happen in Bárðarbunga volcano depends on many factors and not all of them are known. What is known is that heat has been increasing in shallower parts of the crust and caldera for the past six months and those signs are not good. What is not known is the time in question. Next eruption could happen tomorrow or nothing can happen for years. There is no way to know when next eruption is going to happen.
Currently I am just monitoring Bárðarbunga volcano and waiting to see what happens next. The text above is just speculation, not fact. It is not clear what is going to happen next. The only way to know that for sure is to wait until next eruption starts and that might be a long wait.
twitter:almannavarnir twitterde op maandag 16-03-2015 om 12:14:34 The new access controlled area north of Vatnajökull. #Bardarbunga #Holuhraun http://t.co/2WqKuu08MC reageer retweet
twitter:almannavarnir twitterde op maandag 16-03-2015 om 11:27:33 Reduction of the access controlled area N of Vatnajokull, See http://t.co/fJt3Ii570x og á Ísl http://t.co/1FM0an9jxP #Bardarbunga #Holuhraun reageer retweet
twitter:almannavarnir twitterde op woensdag 01-04-2015 om 16:14:55 The new access controlled area north of Vatnajökull #Bardarbunga #Holuhraun http://t.co/hX0QjDTKud reageer retweet
twitter:jonfr500 twitterde op vrijdag 10-04-2015 om 01:02:31 Minor earthquake swarm south of Hekla volcano. It might belong to SISZ (South Icleandic Seismic Zone). http://t.co/1xnDo0lK6G reageer retweet
twitter:BBCAmos twitterde op woensdag 15-04-2015 om 14:42:36 A bit of Bardarbunga at #EGU15 of course - estimate of SO2 emissions. http://t.co/WyZPrOm2Yv Pic by @Sim0nRedfern http://t.co/UisrwpUo2o reageer retweet
http://blogs.egu.eu/geolog/2015/05/08/icelands-bardarbunga-holuhraun-a-remarkable-volcanic-eruption/twitter:jonfr500 twitterde op woensdag 13-05-2015 om 01:20:19 How Bárðarbunga volcano collapsed, http://t.co/s51VY334Rj reageer retweet
Zitten een paar interessante commentaren onder het verhaal.twitter:jonfr500 twitterde op woensdag 20-05-2015 om 23:44:05 New deep earthquake swarm in Katla volcano, http://t.co/JlN3KLGigu reageer retweet
Laatste uitbarsting van de Kayla is alweer even geleden (1918) Hij is al over tijd dus. (Gemiddeld 40 - 80 jaar een uitbarsting).quote:Op donderdag 21 mei 2015 16:12 schreef bwt het volgende:
En Katla is ook weer iets actieverZitten een paar interessante commentaren onder het verhaal.twitter:jonfr500 twitterde op woensdag 20-05-2015 om 23:44:05 New deep earthquake swarm in Katla volcano, http://t.co/JlN3KLGigu reageer retweet
Ik moet nog zien wat er bedoeld wordt.twitter:subglacial twitterde op woensdag 10-06-2015 om 23:34:42 Possible early signs of rejuvenated activity at #Bárðarbunga volcano. #Iceland. Read the 'specialist remark.' http://t.co/qBD7pd1aQG reageer retweet
twitter:jonfr500 twitterde op dinsdag 30-06-2015 om 01:28:30 Deep earthquakes in Bárðarbunga and Tungafellsjökull volcanoes, http://t.co/o9IJDSZh0M reageer retweet
Ijsland en rustigerquote:Op woensdag 1 juli 2015 21:56 schreef GekkePoes het volgende:
Ik dacht echt dat het daar weer wat rustiger was geworden.
quote:A series of tremors hit the Tungnafellsjökull glacier in the Icelandic highlands this morning.
A total of eleven tremors over magnitude 2 were felt in the area this morning, with the strongest – a magnitude 2.9 – coming around 11am.
According to Hildur María Friðriksdóttir from the Icelandic Met Office, tremor waves of this kind are common in the area and are no cause for concern.
Tungnafellsjökull is a relatively small (10 x 5km) glacier to the north-west of the mighty Vatnajökull glacier in South Iceland.
quote:Bárðarbunga Volcano Might Erupt Again
Geologists are now investigating data, indicating that magma might be accumulating again under Bárðarbunga volcano in Vatnajökull glacier. The Holuhraun eruption, which took place between August 31, 2014, and February 27, 2015, was part of a series of events which started in the volcano in 1974 and might provide evidence about the behavior of the volcano in the future.
According to Páll Einarsson, professor of geophysics at the University of Iceland, the next few months will determine whether magma is in fact accumulating. “That’s the big question,” he told RÚV. “There are some indications that this might be the case, but we have to investigate it further.”
The signals, gathered by new equipment on location, are not clear and come from a great depth. Geologists are still learning how to interpret such data.
The Holuhraun eruption is now seen as a chapter in a story that began in 1974. That year, a series of large earthquakes began, which hit at regular intervals in Bárðarbunga. The first chapter ended 22 years later with the eruption and glacial flood in Gjálp in 1996.
After the Gjálp eruption, the volcano was silent for many years, but a few years ago, a new series of earthquakes began, culminating in the Holuhraun eruption in the northeastern highlands in August 2014. The magma came from Bárðarbunga and the caldera sank by 60 meters (197 feet) in the course of the eruption.
Páll believes it’s possible that the next eruption might occur in Bárðarbunga itself. “Bárðarbunga is probably the most powerful volcano in Iceland … Bárðarbunga is the center of a volcanic system which often erupts at the periphery, but still more frequently in the volcano itself.”
It is difficult to predict when the next eruption might start and whether previous eruptions can be used as evidence as to what might happen next. Páll concludes: “We have 30 volcanic systems in Iceland and each one of them has its own personality. To predict what is likely to happen in the near future we have to get to know them a bit personally.”
quote:Katla hit by series of tremors
A 3.3 magnitude tremor hit the south-east of Katla, one of Iceland’s most active volcanoes, in the early hours of this morning.
The main tremor was followed by around ten aftershocks, some of which were shallow and possibly connected to geothermal activity, the Icelandic Met Office reports.
No significant changes to nearby rivers have been reported, but the relevant data will be studied more closely.
“Katla sees this type of seismic cycle from time to time – on average 1-3 times a year,” says the Met Office. “We are monitoring the area closely and will keep everybody informed of any changes. At the moment, things appear to have quietened down.”
quote:Earthquake activity in Bárðarbunga and Grímsfjall volcanoes
Yesterday (17-March-2016) an earthquake swarm took place in Bárðarbunga volcano. This is a weekly cycle at the moment in Bárðarbunga volcano so older readers are used to seeing and read about it already. This started in September 2015 (for the new readers) after the eruption in Holuhraun ended in February 2015. This activity suggest that magma has started to flow into the magma chamber in Bárðarbunga volcano again at faster speeds than before the eruption in Holuhraun. The exact rate is difficult to know, since the magma that started the eruption in Holhraun had been building up in Bárðarbunga volcano since 1970-ish and part of that time earthquake recording was poor or did not exist in Iceland or parts of it until 1995 when the SIL network was created by Veðurstofa Íslands.
The largest earthquake this week had the magnitude of 3,4 while other earthquakes that took place had smaller magnitude. The second largest earthquake had the magnitude of 2,8. Other earthquakes where smaller in magnitude. It is also interesting that part of the earthquake swarm aligned it self along north-south fault in the eastern part of the caldera. That is a new feature, either a weakness is forming at this location or something else is up. This area has around 300 – 500 meter thick glacier on top of it and an eruption at this location would be extremely bad. The glacier flood from eruption at this location would mostly go down Jökulsá á fjöllum glacier river. Other flood locations can’t be ruled out (I’m not an expert on glacier floods and I do have limited knowledge of the landscape under the glacier).
Grímsfjall volcano
It has been five years since Grímsfjall volcano erupted in a largest eruption in 140 years for Grímsfjall volcano. Over the past few weeks there has been a slight increase in earthquake in Grímsfjall volcano. At the moment this doesn’t mean an eruption is imminent, the thing however about eruptions in Grímsfjall volcano is that they happen suddenly and without warning. Normally eruption happens in Grímsfjall volcano every 3 – 5 years on average, sometimes its shorter and sometimes its longer between eruptions.
Notice on Böðvarshólar geophone station
For the longest time now I’ve been having 3G connection issues with Böðvarshólar geophone station. The problems include poor signal, little bandwidth. The poor signal leaks into my recording of earthquakes, making them bad and extremely noisy and that makes them less usable for me. I am going to attempt to improve this situation but if that fails I will have to turn the station down. Since the cost of getting a good antenna for this location is too high and the solution takes too long to implement anyway. I will post a notice if I take down the Böðvarshólar geophone station. If it happens, it is going to happen before I move to Denmark.
Komende week even niet graag. Wil nog wel terug kunnen keren.quote:Op zaterdag 19 maart 2016 14:56 schreef DemonRage het volgende:
Gaan we weer zo'n periode krijgen dat we met z'n allen met spanning de IJslandse vulkanen in de gaten gaan houden?
Deze gaat over IJsland.quote:
quote:Earthquake Hits Major Volcano Site
There was a major earthquake on the northern edge of the Bárðarbunga volcanic craters at around midnight last night.
The quake measured 4.2 on the Richter scale and is therefore the largest quake to have hit the famous volcano since it stopped erupting in February last year.
According to Bjarki Fries, a naural disasters specialist with the Icelandic met office, the earthquake emanated from 3.5 kilometers underground. Around 15 aftershocks have already been measured, the most powerful of which was a 3.5 quake at 01.00 this morning.
Met office earthquakes specialist Martin Hensch told RÚV that there is no evidence of lava movements or of any eruption activity connected to the earthquakes, but that the situation will be monitored carefully. There were two quakes in the same location on April 3, measuring 3.4 and 3 on the Richter scale.
The recent eruption at Bárðarbunga, often known as Holuhraun, lasted from late August 2014 to late February 2015, and despite not affecting aviation or physically threatening any human settlements, it caused dangerous levels of pollution around Iceland and produced more new lava than almost any other eruption in Iceland since the Vikings first arrived.
Hmmmm... HLNquote:Op dinsdag 21 juni 2016 22:06 schreef aloa het volgende:
Hekla staat op uitbarsten...
http://www.hln.be/hln/nl/(...)zen-grote-ramp.dhtml
Veel linkjes in bovenstaand artikel...quote:Is Hekla really going to blow?
The volcanoes of Iceland are some of the most closely watched on the planet. Not only is there an extensive seismic array that records all the earthquakes that occur on the island nation, but many volcanoes have both GPS monitoring of their shape and borehole strain gauges that measure stresses underground caused by these changes in shape. There have been examples in Iceland where sudden and strong changes in strain in these boreholes came right before an eruption, including the 2000 eruption of Hekla. Volcanologists in Iceland are watching for any signs that an eruption might be in the works so that appropriate measures to protect lives and property can be enacted.
That’s why it is a little peculiar that Dr. Páll Einarsson of the University of Iceland warned people and airplanes to “stay away” from Iceland’s Hekla based on his interpretation of accumulated strain at the volcano. According to reports coming out of Iceland, Dr. Einarsson says that strain measured on these strain gauges is higher than it was prior to the 2000 eruption. Also, it has been 16 years since Hekla’s last eruption and, at least for a brief period from 1970-2000 (mind you, this is a very short time for the lifespan of any volcano), it was erupting about every 10 years. Put those together and he thinks that Hekla is ready for its next eruption, and it could happen soon.
However, I am a little perplexed by this statement from Dr. Einarsson and I wish I knew more about the context in which the quotes were given. Without confirmation from the Icelandic Met Office (the volcano monitoring agency), I don’t really know how to assess the validity of what Dr. Einarsson is saying.
Volcanoes care not for your puny human schedules, so you might expect an eruption soon ... or might not.
Does this mean that doom is coming? Not necessarily. As I said, although Hekla did have a pattern of eruptions every ten years after 1970, prior to that the volcano had no eruption from 1947 to 1970, over 22 years. In fact, if you go back to the 1597 AD eruption (again, be wary of any arbitrary starting point for statistics), Hekla has had eight eruptions separated by anywhere from 32 to 79 years (and if I wanted to choose the most common repose interval, it is ~35 years). That being said, volcanoes care not for your puny human schedules, so you might expect an eruption soon … or might not.
Scientists also don’t have strain data going back further than the 2000 eruption of Hekla, so they don’t have a good baseline for understanding exactly how the strain changes before every eruption—just what happened prior to the 2000 event. That’s not to say that they shouldn’t expect something similar, but the data is somewhat scant.
You can actually see the near real-time strain data coming from around Hekla. Now, I am no expert on these readings, but if you compare them to the readings before the 2000 eruption, there doesn’t seem to be much sign of an eruption coming in the near future (that is, next few hours to days). The five gauges are all roughly the same and prior to the 2000 eruption, they all diverged as the new magma intruded the volcano. You can also check out the earthquakes recorded near Hekla and nothing suspicious appears to be happening either.
For an Icelandic volcano, Hekla has a surprisingly explosive history of eruptions. These explosive eruptions have produced ash plumes that reached over 15 kilometers (~50,000 feet). They are also eruptions that tend to be rich in fluorine, which is especially hazardous to grazing animals as they eat fluorine-contaminated ground cover that leads to fluorinosis (and many times, death). You can imagine the travel ramifications of a large explosive eruption from Hekla—we saw that during the 2010 eruption of Eyjafjallajökull. Hekla has produced some large fissure eruptions as well, with abundant basaltic lava flows, much like what we saw from the Holuhraun eruption in 2014-15.
Now, I’m not saying that Dr. Einarsson is wrong to be point out what he thinks the threat of Hekla right now might be, but without official world from the IMO or emergency management agencies in Iceland, I worry that these statements could be jumping the gun (if Dr. Einarsson was quoted correctly). One of the biggest challenges for volcano monitoring and mitigation is getting people to believe the threat when it presents itself. Too many false alarms, even if they aren’t coming from the official monitoring and management agencies, can make people feel like they can’t trust officials (see: L’Aquila earthquake in Italy). I hope that the IMO releases a statement soon in response to what Dr. Einarsson said so we can know what might be happening at Hekla. Until then, you can watch Hekla on its webcam.
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