[aktueel] Vulkaanuitbarsting bij Canarische Eilanden #3

VUELO CIENTÍFICO INVOLCAN - GC 020112 - VOLCÁN SUBMARINO DEL HIERRO - CENIZAS Y GASES VOLCÁNICOS

VUELO CIENTÍFICO INVOLCAN - GC 020112 - VOLCÁN SUBMARINO DEL HIERRO - BURBUJEO Y CENIZAS

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THE EXTENT OF THE TREMOR OF EL HIERRO eruptive process is almost constant.

03/01/2012 ... 15:37 - Ministry of Economy, Finance and Security

The tremor signal recorded by the seismic monitoring network of the National Geographic Institute (IGN) has remained almost constant during the second day of January, as reported by that body to the direction of the Civil Protection Plan for Volcanic Risk ( PEVOLCA).

Specifically, the signal continued until 3:00 am then a constant amplitude amplitude decline sharply, beginning a slight gradual increase until it stabilizes at 6:00 for ten hours. After this period and within a low level of tremor, the signal began recording a slight decrease in amplitude for four hours, recovering the level of middle of the day. Although the signal has a low amplitude tremor is present in the record confirming that the eruptive process continues.

Regarding the seismicity should be noted that, during the day yesterday, is located two low-magnitude events in the area of the Julan, around three in the morning, which were not felt by the population .. In total, since the day July 19, 2011 11 959 events have been found.

Deformation
The deformation monitoring stations throughout the island show a stable pattern in the vertical component and the horizontal. At stations located south vertical is a trend of deflation.

Spot
For its part, the stain was visible throughout the day with a well-defined bubble and fine material. The green part widely spread eastward from the broadcast center, by the action of ocean currents. The day before, on January 1, the emission area was well defined with a brown center and in the morning there were moments of matter emissions. During the rest of the day was observed bubbling bad that sometimes even produced bubble rings

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NOTE AVCAN 408 - EARTHQUAKE ACTIVITY-VOLCANIC - HIERRO ISLAND - 04 January 2012-10:45 h peninsular - seismic-volcanic activity remains moderate with moderate seismicity located in the north today, in the sea of el Golfo, and some events weakest detected. Continued volcanic tremor signal in the eruption of the Restinga, with an amplitude that remains more or less stable. Today, like yesterday besides the bubbling brown spot and pyroclastics are floating in the steaming webcams. The magnitude of 1.4. New earthquakes 1. Depth to 16.7 km. Before yesterday 2. Yesterday 1. Today they 1. A total of 11,966 earthquakes are located in El Hierro by IGN from 9:00 am of July 19, 2011.

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Update 04/01 – 10:49 UTC
- A lot of SLS / smoking pumice this morning.
- Salvamar Adhara is out to pick up material or even to try videotaping what happens (if they are ready to risk their material).

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Op woensdag 4 januari 2012 12:55 schreef Jumparound het volgende:
ben benieuwd wanneer het nieuwe eiland geboren gaat worden

La Restinga, El Hierrom 4th January Morning SLS Time Lapse

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These days ago they got some pictures of a new island that has emerged from the sea by volcanic activity in the archipelago of Zubair Island in the Red Sea, this video is part of that activity.
These images can help us imagine what might happen in El Hierro .... La Restinga is more or less the same distance from the emission point of the islet on which passes behind the eruption column and all the ash falling .... on second thought, do not pass ... (Enrique)

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The thing is that this new island in the Red Sea took months without showing seismicity or anything ... and out of the blue on December 19 began to see the plume and emerge from water in a fairly surtseyana apparently .....

يارب رحمتك .بركان البحر الاحمر تصوير حصري لسفينة ينبع

بركان البحر الحمر (2).ياربي رحمتك.تصوير حصري لسفينة ينبع

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Update 04/01 – 22:22 UTC
There we go again and take the information as it is – we are not responsible when it should be a boat : )
- Reader Hein commented in our comments section below that he has seen at irregular intervals glowing ashes on the (still zoomed) eruption webcam. After our boat lights history we were far from eager to put this information online, but after looking at the webcam ourselves, we saw the same short-lived incandescent light at various locations . AVCAN members are also sure ! It is smoking lava !
Joke is currently out with her binoculars to look to the sea. She has not seen the glowing lava pieces yet but, sitting on some lava field outside La Restinga, she sees the stain clearly in the moonlight.
This is what can be seen now on then on the eruption webcam (we have captured 2 of the pictures ourselves in about 10 minutes time):

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NOTE AVCAN 409 - EARTHQUAKE ACTIVITY-VOLCANIC - HIERRO ISLAND - 05 January 2012-09:45 h peninsular - seismic-volcanic activity remains moderate with moderate seismicity located in the north today, in the sea of El Golfo, and some events weakest detected. Continued volcanic tremor signal in the eruption of the Restinga, with an amplitude that is held in a spherical pulses 12h 30 min up and down in intensity, doubling the maximum amplitude from the lows. All day yesterday and last night were steaming pyroclastic floating in webcams. The magnitude of 1.8. New earthquakes 1. Depth to 13 km. Days ago 1. Yesterday 1. Today they 1. A total of 11,967 earthquakes are located in El Hierro by IGN from 9:00 am of July 19, 2011.

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And are today, January 5, five sismitos around Tenerife, one of Puerto NW, about 11 km from the coast, and the other 4 SE of Candelaria, in a straight line, the farthest about 12 '5 km and the closest to a 4,5 km from the coast, in between the other two, closer, about 6km, and very close together. The size of each map. (Humberto)

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Update 05/01 15:22 UTC
- A very curious pattern in GPS deformation patterns (the data which are published are probably 2 days old). The deformation at HI02, HI03 and HI04 climbed strongly ! La Palma deformation stayed approx. the same, but Tenerife and La Gomera GPS data decreased the strongest since the beginning of El Hierro activity. The current earthquakes at Tenerife may have an origin in this strong deflation (tension). The smoking lava Yesterday and Today also. @ IGN to solve the clue here. Hopefully they will explain in their report later today.

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There seems to be moving in the Border GPS station in the last two days, in every season reflects a movement that has similar characteristics and should be monitored to see if it continues the next day.

Comparing the data of IGN compared to other stations of Frontera, it's like Frontera station was moving to the east, as there is no relative motion with respect to NS Palma and a movement of approach compared to the Tenerife. HI02, HI03 and HI04 seem to have the same pattern of separation.

As for the vertical deformation .... will have to wait to see part of IGN happens, but if some do not move and goes to the East border, depart hence, it is conceivable that there should be an inflation (Enrique) .
[bron]

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Update 05/01 16:02 UTC
- The glowing lava that we were able to see during the night is probably caused by brittle lava blocks who are breaking apart. IGN did measure the temperatures the last couple of days of the lava blocks while they were picked up out of the sea. The lava blocks which we can see are hollow inside and are containing a lot of gas. This gas is the main reason that they are floating to the surface waters. At the outside the blocks were no warmer than 40�C but the gases at the inside were 200�C. A theory for the flames we saw last night (it was no glowing but ignited gas - see video Julio) is that the hot gas (hard to say which composition) is ignited just by the oxygen when the brittle lava is breaking apart or that the gas is ignited by the high temperature of the lava at the inside.
Once the gas is burned, the lava sinks back to the sea floor.

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NOTE AVCAN 410 - EARTHQUAKE ACTIVITY-VOLCANIC - HIERRO ISLAND - 06 January 2012-09:45 h peninsular - seismic-volcanic activity remains moderate with moderate seismicity located in the north today, in the sea of el Golfo, and some events weakest detected. Continued volcanic tremor signal in the eruption of the Restinga, with an amplitude that is held in a spherical pulses 12h 30 min up and down in intensity, doubling the maximum amplitude from the lows. Is rising from the peak intensity yesterday. They are also possibly hydromagmatic small explosion. Yesterday during the day and this morning sporadically mainly pyroclastics are floating in the steaming webcams. Days ago 1. Yesterday 1. Now go 0. A total of 11,967 earthquakes are located in the vicinity of the Iron and IGN from 9:00 am of July 19, 2011.

Update 06/01 14:23 UTC
- Some people are asking us, what would be the next step to look for before it gets really Surtseyan ?
If steam jets are starting to appear (even at limited height of a few meters), this would mean that the lava generated superheated steam reaches the surface waters. From that moment, everything is possible. If the volcano activity gets weaker again, the jets will fall back. It the vent continues to grow with the same activity, the superheated steam will soon carry ash and will become blackened.
- We do not expect this to happen soon, as we expect the current smoking material to be floaters. IGN will certainly inform us in time.
- Based on earlier interviews in the local press, we think that the current philosophy is : no gas alert and / or no earthquakes and / or no strong harmonic tremor = no (potentially dangerous) eruption action
- Good to know is that : IGN people do not really talk to the press about the alert situation, only Pevolca is in charge for press reports

Update 06/01 13:55 UTC
- Thanks to Julio del Castillo Vivero and the ACN Press people, the U-stream webcam is back online.
- NOBODY seems to bother about what is going on at the vent.
- Its Three Kings Day, a festival day in Spain, that maybe the real reason about what is happening.
- We are wandering if people at La Restinga feel OK with what is happening (in the meantime, Joke told me that people at La Restinga are telling her that there is a lot of activity today).
- No helicopters, no boats. No infrared cameras at night.
- Joke went to the CAP science center a little while ago and the IGN people on duty said As usual, nothing special.
- IGN People at CAP were laughing about the burning lava at sea the day before yesterday (thousands of people have seen this phenomenon, images are online, videos are online, what else do they need to be convinced that gas was ignited + Joke has confirmed the burning lava with her binoculars ).
This site is not a science fiction site, but a factual site.

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New part of of the Canary Islands, the most notable, if not as bad .. is that the end of the hand say that yesterday was apreciarion lava fragments on the surface, or rather did not see them, all we saw in the last days Webcams and there are in INVOLCAN pictures and videos ... milk to see if you look a little to make the parts and put more care .. (Enrique)

THE EL HIERRO VOLCANO CONTINUES TO CAST magmatic material to the surface.

06/01/2012 ... 15:09 - Ministry of Economy, Finance and Security

This morning large amount of pyroclastic was visible from the coast

The submarine El Hierro volcano continues to cast magmatic material to the surface of the Calmas Sea. This morning, scientists at the National Geographic Institute (IGN) have confirmed the direction of the Civil Protection Plan for Volcanic Risk (PEVOLCA), which from the coast were numerous fragments of lava significant, confirming the continuous activity of the volcano.

In the coming days members of the IGN, with the collaboration of Salvage, try to collect some samples to be analyzed for further study of this eruption will soon be three months of activity.

January 5
During the day yesterday, January 5, the tremor signal recorded by the seismic monitoring network of IGN had a weak decrease reaching a minimum value about 2.30am, which lasted until 4:30 hours. At this time began a gradual increase until at 8:00 recovered the value of the start of the day, keeping practically during the remaining hours.

The seismicity is negligible and only located at 00:02 hours, a movement in the Sea of Calmas, at magnitude 1.8 on the Richter scale and a depth of 13 kilometers, which was not felt by the population.

In total, since the day July 19, 2011 11 962 events have been found.

deformation
The deformation monitoring stations generally show a pattern of stability in the horizontal and vertical components. At the stations of El Golfo there is a slight shift to the south and the area south of the island, a vertical trend of deflation.

spot
In the early hours of the day was very visible colored header with a bubbling central area surrounded by a large area of brown for the content of fine material in suspension. There were no surface lava fragments. Due to the wind and sea conditions during the rest of the day appreciated the anomalous zone.

La Restinga, El Hierro 6th January Time Lapse 07.30 - 18.35 GMT

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NOTE AVCAN 411 - EARTHQUAKE ACTIVITY-VOLCANIC - HIERRO ISLAND - 05 January 2012-10:30 h peninsular - seismic-volcanic activity remains moderate with moderate seismicity located today on el Julan and some weak events detected. Continued volcanic tremor signal in the eruption of the Restinga, with an amplitude that remains more or less stable. Yesterday there were several explosions hydromagmatic in the duct. All day yesterday and last night were steaming pyroclastic floating in webcams and end of the evening bubbling and steam on a continuous basis. The magnitude between 1.5 and 1.1. New earthquakes 4. Depth to 7, 12, 14 and 16 km. Days ago 1. Yesterday 2. Today van 2. A total of 11,971 earthquakes are located in El Hierro by IGN from 9:00 am of July 19, 2011.

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Update 07/01 – 11:29 UTC
- new earthquake
M 1.0 @ 14 km at 10:51 Here
- Cabildo / Movistar eruption webcam is working again (on a Saturday !). We do thank all our readers who have joined us in asking Movistar to fix the problem.
- The U-stream webcam reveals powerful floater lava blocks in a far wider area than ever before. The floaters are surfacing in different spots whereas before they almost all surfaced at the same narrow spot.

Update 07/01 – 08:51 UTC
- 2 new earthquakes since midnight UTC
M 1.5 @ 16 km at 06:23 Here
M 1.1 @ 12 km at 06:43 Here
- harmonic tremor a little bit rising since 07:30 this morning
- continuous steaming above the vent and based on what we saw yesterday an even wider steam patch today (maybe in part due to a stronger blowing wind).
- Cabildo / Telefonica webcams @ La Restinga “out of order”. Yessterday afternoon 800 people were looking at the same time at the U-stream webcam. No alternative. The FREE U-stream signal handler from ACN Press and El Pinar Ayuntamiente is doing a better job than a MULTI-BILLION COMPANY like TELEFONICA. Unbelievable ! As the eruption process continues at a steady pace and the current visiting numbers will only be peanuts compared to what will come if the eruption turns subaerial. AXIS, the company who delivered the webcams, is based on their webpage an important player in Spain. They can do a lot better as they have also HD cams in their catalog.
- we really do NOT understand why Pevolca is not commenting on what everybody sees on the webcam and has noticed a couple of days ago. As there is not that many historic material, we can understand that they do not know every element of the different phases, but telling that we are all crazy to see burning gas in the sea at night and telling that the current steaming phase is the same than a few smoking patches of floater lava blocks, is making fools of all of us !

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Right now the INVOLCAN is conducting a scientific flight Helicopter Unit of the Guardia Civil of the Canary Islands area
[bron]