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  zaterdag 11 april 2020 @ 11:11:38 #51
11839 DemonRage
[ Eindhoven ]
pi_192565277
quote:
Mooi om te zien dat die aswolk nog maar net uitgespuugd is en er al meteen bliksem in zit.
pi_192565475
Niet meer nieuws over dit vulkaan?
De oude oude layout was veel beter!!
vosss is de naam,
met dubbel s welteverstaan.
  Moderator donderdag 14 mei 2020 @ 12:46:03 #53
8781 crew  Frutsel
pi_193121140


quote:
Earthquake swarm beneath Loihi volcano Hawaii
The USGS Hawaii Volcano Observatory (HVO) reported increased seismic activity at the submarine Lōʻihi volcano in Hawaii from May 11 to 12, 2020. More than 100 earthquakes were detected, but USGS noted that there is no indication that a submarine eruption has occurred and there are no significant hazards of concern to the Island of Hawaiʻi at this time. Lōʻihi is the youngest Hawaiian volcano located approximately 35 km (21.7 miles) SE of Pahala, at a water depth of approximately 1 km (3 300 feet). Its last major activity was back in 1996.

The swarm, which began around 13:00 UTC (03:00 LT) on May 11, included 79 M2 quakes and 19 M3 and above. It's located beneath the southeast rift zone and southeastern flank at depths of 3 600 to 12 400 m (11 800 to 40 682 feet) below sea level or 1 to 9.8 km (0.6 to 6 miles) below the volcano's surface.

This is a significant increase above long term background rates of fewer than three tremors per day at Loihi, generally measuring M2 below.

The number of quakes peaked at 14 per hour, between 23:00 to 00:00 UTC from May 11 to 12 (13:00 to 14:00 LT on May 11), and then decreased afterward. Earthquake rates have been less than four per hour since early Tuesday, May 12.

Tina Neal with the USGS HVO said her team is monitoring the volcano for activity and that she expects other signs of eruption. Loihi's last major activity was around 24 years ago, during a swarm of more than 4 000 events.

Neal added that given Loihi's location underwater, it is difficult to pinpoint what exactly is happening at the volcano, but she noted that the current increased seismic activity in the area does not pose a threat to Hawaii residents.

"This swarm may represent a brief magmatic intrusion or movement of magmatic fluids within the volcanic edifice," USGS said in a statement issued 22:22 UTC on May 12. "Although the swarm appears to have diminished in intensity if earthquakes become shallower, it could lead to the beginning of a submarine eruption, similar to what occurred in 1996."

If an eruption would occur, USGS said it may cause partial draining of its summit magma chamber, as well as summit collapse. Abrupt changes to the volcano's surface could displace massive volumes of ocean water, which may generate small local tsunami waves.

Earthquakes of magnitude 4 and above could occur if the swarm were to intensify and these may be felt on the Island of Hawaiʻi.

If an eruption or stronger earthquakes occur, very small tsunami waves may affect southeast shores of the Island of Hawaiʻi. Relatively low-energy, steam- and gas-driven explosions can occur at the depth of Lōʻihi, but with limited local effects on the volcano and surrounding ocean water.

There is no direct relationship between the current Lōʻihi swarm and the ongoing increased seismicity observed in Pāhala over the past year, USGS said.

The Lōʻihi swarm is ~35 km (21.7 miles) southeast of Pāhala, at significantly shallower depths. The current Lōʻihi swarm is also unrelated to seismicity observed on the south flank of Kīlauea.

Loi'hi seamount is an active volcano on the seafloor south of Kīlauea Volcano, about 30 km (19 miles) from the shoreline of the Island of Hawaiʻi. The top of the seamount is about 975 m (3 199 feet ) below sea level. The volcano consists of a broad summit area marked by three pit craters and two prominent rift zones extending from the summit about 22 km (13.6 miles) SSE and about 15 km (9.3 miles) NNE. The volcano likely has a shallow magma chamber between 1 to 2.5 km (0.6 to 1.6 miles) deep below the summit.

Earthquake activity has been recorded near Lōʻihi since 1952. Prior Lōʻihi earthquake swarms occurred in 1952, 1971–72, 1975, 1986, 1988, 1990, 1991, 1996, 2005, and 2017, and were characterized by hundreds to thousands of earthquakes occurring over weeks to months with magnitudes ranging up to M4.9.

The largest earthquake detected at Lōʻihi was M5.1 in May of 2005. Many of the 1952 Lōʻihi earthquakes were felt in coastal communities and one of the earthquakes generated a small tsunami that swept inland about 180 m (600 feet) at Kalapana; no damage was reported.

The 1996 Lōʻihi earthquake swarm was one of the most intense earthquake swarms recorded by the HVO monitoring networks and is summarized below.

For the six weeks commencing July 16, 1996, HVO recorded more than 4 000 earthquakes in the LOIHI area. 95 of these earthquakes were between magnitude 4.0 and 4.9, and nearly 400 were stronger than magnitude 3.

Most of the earthquakes occurred during the last half of July during three time periods, each lasting about two to five days and separated by less than one to four days. Subsequent undersea expeditions to the area discovered that the volcano's summit area had collapsed to form a new crater about 550 m (1 800 feet) across and 275 m (900 feet) deep.

Hydrothermal vents were observed in the new crater, and evidence was found of newly erupted lava.
  Moderator woensdag 27 mei 2020 @ 15:33:28 #54
8781 crew  Frutsel
  Moderator donderdag 11 juni 2020 @ 08:45:09 #56
8781 crew  Frutsel
pi_193578880
quote:
Eruption at Sangay volcano produces pyroclastic flows, covers several provinces in ash, Ecuador

A strong eruptive event at Ecuador's Sangay volcano on Tuesday, June 9, 2020, produced a thick column of ash that rose up to 7 km (23 000 feet) above sea level. Several provinces were covered in ash, flights delayed and some roads closed.

Ashfall was reported in the provinces of Santa Elena, Guayas, Los Ros, Chimborazo, and Morona Santiago. The greatest ashfall was reported in the Alaus canton, Chimborazo Province. Residents living in affected regions were urged to wear protective masks.

Intermittent volcanic ash emissions were noted in infrared satellite imagery along with a brilliant hotspot at the summit, extending SE, the Washington VAAC reported at 06:22 UTC.

Remnant volcanic ash extended well W and WSW of the summit to about 300 km (185 miles) downwind, the center reported at 10:43 UTC.

Geophysical Institute of Ecuador (IGEPN) said pyroclastic flows were generated during the event and descended down the southeastern flanks of the volcano. Lava flows remain active, it added.

Yesterday's event is most likely related to the collapse of one or more lava fronts that descended down the southeastern flank of the volcano, the institute added.

Continuous puffs were again reported at 02:05 UTC on June 10, extending up to 85 km (50 miles) from the summit. Models indicated continued movement toward the W

Benjamin Bernard of the IGEPN said the ash spread into Guayas province, with a 'quantity arriving ner Guayaquil.'

Guayaquil airport halted all flights until they cleaned the runway, airport authorities said. The city is located 175 km (110 miles) W of Sangay.

Several roads in the provinces of Los Rios and Chimborazo were reportedly closed due to heavy ashfall.

Residents in affected regions, especially Guayaquil, were asked to wear protective masks to avoid respiratory problems.
  Moderator dinsdag 16 juni 2020 @ 11:00:44 #57
8781 crew  Frutsel
pi_193652832
quote:
Alerts raised after significant earthquakes under Makushin volcano in Alaska, U.S.

Two earthquakes with magnitudes larger than 4.0 were registered in the vicinity of Makushin volcano, Alaska over the past 12 hours, representing a significant departure from background earthquake activity. The last eruption of this volcano took place in 2005 (VEI 1). A powerful VEI 5 eruption took place in 6100 BCE 50 years. Although no large eruptions have occurred in this century, small-to-moderate explosive eruptions have been recorded at Makushin since 1786.

The events -- measuring M4.5 at 21:16 UTC on June 15, M4.1 at 00:34 UTC on June 16, and M3.9 at 02:38 UTC on June 16 -- could be associated with volcanic unrest, the Alaska Volcano Observatory said.

As a result, the Aviation Color Code was raised to Yellow and Volcano Alert Level to Advisory.

"The unrest could result in a future eruption, however, that is not a certainty," AVO said. "Aftershocks continue, as would be expected with earthquakes of this size."

The volcano is monitored with a network of seismic instruments, web camera, GPS, satellite data, and regional infrasound and lightning detection instruments.

The ice-covered, 1800 m (5 905 feet) high Makushin volcano on northern Unalaska Island west of the town of Dutch Harbor is capped by a 2.5 km (1.5 miles) wide caldera. The broad, domical structure of Makushin contrasts with the steep-sided profiles of most other Aleutian stratovolcanoes.

Much of the volcano was formed during the Pleistocene, but the caldera (which formed about 8 000 years ago), Sugarloaf cone on the ENE flank, and a cluster of about a dozen explosion pits and cinder cones at Point Kadin on the WNW flank, are of Holocene age.

A broad band of NE-SW-trending satellitic vents cuts across the volcano. The composite Pakushin cone, with multiple summit craters, lies 8 km (5 miles) to the SW of Makushin.
  Moderator dinsdag 16 juni 2020 @ 11:01:01 #58
8781 crew  Frutsel
  Moderator maandag 20 juli 2020 @ 11:37:07 #59
8781 crew  Frutsel
pi_194488525
Sinabung in Indonesi doet weer boem:
pi_195008576
Vulkaan onder Limburg

Vandaag
Stevent Limburg af op een eruptie?
Wetenschappers zeggen dat er een vulkaan actief is onder Zuid-Limburg.
Dankzij metingen van duizenden gps-antennes is het duidelijk dat een vulkanische hotspot actief is.
De bodem komt daardoor jaarlijks ongeveer een millimeter omhoog.

Vulkaan actief vlak bij de Limburgse grens
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  vrijdag 11 september 2020 @ 23:58:19 #63
181124 chufi
joder que guapo estoy
pi_195013552
quote:
0s.gif Op vrijdag 11 september 2020 19:57 schreef -CRASH- het volgende:
Vulkaan onder Limburg

Vandaag
Stevent Limburg af op een eruptie?
Wetenschappers zeggen dat er een vulkaan actief is onder Zuid-Limburg.
Dankzij metingen van duizenden gps-antennes is het duidelijk dat een vulkanische hotspot actief is.
De bodem komt daardoor jaarlijks ongeveer een millimeter omhoog.

Vulkaan actief vlak bij de Limburgse grens
[ afbeelding ]
1 mm is wel heel weinig ... maar de pijltjes geven wel een soort rek aan
Cuando haya sol, hay Chufi
Muziek, Music y Musica
Come On
pi_195020731
quote:
^O^ ^O^ ^O^
Ik zag em niet meer in mijn active topics

[ Bericht 4% gewijzigd door Frutsel op 24-09-2020 12:12:54 ]
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<a href="http://www.estofex.org/" rel="nofollow" target="_blank">ESTOFEX</a>
pi_195020769
quote:
_O- _O- _O-

Ze komen elk weekend al volop naar Venlo
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pi_195193982
quote:
Increased seismicity at Pavlof volcano, Alaska

Seismic activity at Pavlof volcano has increased on September 21, 2020, prompting the Alaska Volcano Observatory (AVO) to raise the Aviation Color Code to Yellow and Alert Level to Advisory.

While this does not necessarily mean that an eruption is likely or imminent, past eruptions at Pavlof occurred with little or no warning, AVO stated.

There is currently no observed eruptive activity or emissions in cloudy satellite imagery and web camera views.

"However, the seismic activity represents an increase from background levels and we are thus increasing the Aviation Color Code and Alert Level to YELLOW/ADVISORY," AVO said.

Pavlof is a snow- and ice-covered stratovolcano located on the southwestern end of the Alaska Peninsula about 953 km (592 miles) southwest of Anchorage.

The volcano is about 7 km (4.4 miles) in diameter and has active vents on the north and east sides close to the summit.

Geological summary
The most active volcano of the Aleutian arc, Pavlof is a 2 519-m-high (8 264 feet) Holocene stratovolcano that was constructed along a line of vents extending NE from the Emmons Lake caldera.

Pavlof and its twin volcano to the NE, 2 142-m-high (7 027 feet) Pavlof Sister, form a dramatic pair of symmetrical, glacier-covered stratovolcanoes that tower above Pavlof and Volcano bays.

A third cone, Little Pavlof, is a smaller volcano on the SW flank of Pavlof volcano, near the rim of Emmons Lake caldera.
Unlike Pavlof Sister, Pavlof has been frequently active in historical time, typically producing Strombolian to Vulcanian explosive eruptions from the summit vents and occasional lava flows. The active vents lie near the summit on the north and east sides.

The largest historical eruption took place in 1911, at the end of a 5-year-long eruptive episode, when a fissure opened on the N flank, ejecting large blocks and issuing lava flows. (GVP)
pi_196453119

Een zeer interessante video over de grootste vulkaan van China ^O^
Veni, vidi, vodka.
pi_196466825
twitter

twitter
  Moderator zondag 29 november 2020 @ 19:07:43 #71
8781 crew  Frutsel
pi_196473660
quote:
Indonesian volcano Mount Ili Lewotolok erupts, closing airport
No injuries reported but authorities create exclusion zone around the crater

Indonesia’s Mount Ili Lewotolok erupted on Sunday, releasing a column of smoke and ash 2.5 miles (4km) into the sky, triggering a flight warning and the closure of the local airport.

There were no reports of injuries or damage from the eruption in a remote part of the south-east Asian archipelago. But authorities raised the volcano’s alert status to its second-highest level as they warned of possible lava flows.

A 1.2-mile no-go zone around the crater was also expanded to 2.5 miles, while flights were advised to steer clear of the area as volcanic ash rained down on Wunopitu airport in East Nusa Tenggara, which was temporarily closed.

“People are advised to not carry out any activities within a 4km radius from the crater,” Indonesia’s geological agency said.

Indonesia is home to about 130 active volcanoes due to its position on the Ring of Fire, a belt of tectonic plate boundaries circling the Pacific Ocean where frequent seismic activity occurs.

In late 2018, Anak Krakatau, a volcano in the strait between Java and Sumatra islands, erupted and caused an underwater landslide that unleashed a tsunami, killing more than 400 people.
  Moderator zondag 29 november 2020 @ 19:08:33 #72
8781 crew  Frutsel
  Moderator maandag 28 december 2020 @ 12:55:34 #73
8781 crew  Frutsel
pi_197018885
quote:
Heightened volcanic unrest at Mount Ruapehu, New Zealand

The temperature of the Crater Lake (Te Wai ā-moe) at Ruapehu volcano has decreased from 43 to 41 C (109 - 106 F) during the past week. The level of volcanic tremor continues to be moderate to strong and a small number of shallow volcanic earthquakes have been recorded. While the crater lake may have stopped heating, volcanic activity at Ruapehu remains elevated -- the Volcanic Alert Level remains at Level 2 and the Aviation Colour Code at Yellow since December 21, 2020.

"Since our last update [on December 21, 2020], Ruapehu’s Crater Lake (Te Wai ā-moe) temperature has decreased slightly. The temperature reached a maximum of 43 C (109 F) on December 21 that subsequently declined to about 41 C (106 F)," GeoNet's Duty Volcanologist Agnes Mazot said on December 28.

A lake temperature peak of about 40 - 46 C (104 - 115 F) is common during these heating-cooling cycles; on at least 7 occasions since 2007, the lake temperature exceeded 40 C.

Using this lake temperature decrease, it is estimated that the energy input into the lake has decreased from ~400 to ~200 MW (megawatt).

Elevated volcanic tremor is still ongoing along with a few volcanic earthquakes, Mazot added.

The largest of these earthquakes was M2.2 on December 26, located under the volcano. Volcanic earthquakes of this size are uncommon and the combination with elevated tremor and still high lake temperature indicate moderate to heightened volcanic unrest. Because of this, the Volcanic Alert Level remains at Level 2.

"We continue to closely monitor Ruapehu, and this week we will attempt a gas flight to measure volcanic gas emissions. We will also attempt to sample the water at the crater lake for further chemical analyses. Together, these will help us identify processes occurring at depth beneath the volcano."

The Volcanic Alert Level is still at Level 2 which reflects the current level of volcanic activity. Ruapehu is an active volcano and has the potential to erupt with little or no warning when in a state of volcanic unrest. The Aviation Colour Code remains at Yellow.

The Volcanic Alert Level should not be used to forecast future activity, however, at Volcanic Alert Level 2, eruptions are more likely.

Volcanic Alert Level 2 indicates the primary hazards are those expected during volcanic unrest: steam discharge, volcanic gas, earthquakes, landslides and hydrothermal activity. While Volcanic Alert Level 2 is mostly associated with environmental hazards, eruptions can still occur with little or no warning.

The Department of Conservation (DOC) has closed the summit area of Ruapehu, including a 2 km (1.2 miles) radius from the center of Te Wai ā-moe/Crater Lake.

"Our priority is to protect public safety, so we ask visitors to respect the exclusion zone under Volcano Alert Level 2 [VAL2] for their own safety," Tongariro Operations Manager Connie Norgate said.

Mount Tongariro and the Tongariro Alpine Crossing are not affected by increased volcanic unrest at Mount Ruapehu and remain open.
pi_197087395
New eruption at Soufrire St. Vincent volcano, Alert Level raised to Orange, Saint Vincent and the Grenadines

A new eruption has started at Soufrire St. Vincent volcano in Saint Vincent and the Grenadines on December 28, 2020. The Alert Level was raised to Orange (3 of 4).

Recreational visits to the volcano have been suspended.
There might be an order to evacuate high-risk areas at relatively short notice.
The last eruption of this volcano took place in 1979 (VEI 3).
Much of the northern end of St. Vincent island was devastated by a major eruption in 1902 (VEI 4) that coincided with the catastrophic Mont Pele eruption on Martinique.
On December 28, residents living near the volcano reported steam coming from the crater, prompting the National Emergency Management Organization (NEMO) to send out teams to investigate the volcano. At the same time, satellite observations confirmed thermal emissions at the crater.

NEMO team arrived on December 29, confirming that a new effusive eruption has started. Essentially, magma is now slowly coming from the earth, building a new lava dome (seen in the picture below)



The dome is growing on the edge of the old lava dome created in 1979 -- forming a dome on the rim of the dome.

he Alert Level was raised to Orange (3 of 4) around 01:00 UTC on December 30.

An Orange Level means:

Highly elevated level of seismicity or fumarolic activity or both.
Eruptions may occur with less than 24 hours notice.
Monitoring system continuously manned. Regular visual inspection of potential vent areas. Continuous ground deformation and hydrothermal monitoring.

NEMO has issued a revised Volcano Hazard Map of the volcano.

Please note that Fancy and Georgetown are now in the very high hazard zone - red zone. This means that these communities will need to evacuate in the event of an eruption or pending eruption.



  zaterdag 16 januari 2021 @ 14:20:03 #76
307331 aloa
Steeds harder, steeds sneller
pi_197444826
twitter
94257
478969
I'm here to turn up the volume
  zaterdag 16 januari 2021 @ 14:26:48 #77
307331 aloa
Steeds harder, steeds sneller
pi_197444946
twitter
94257
478969
I'm here to turn up the volume
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