[Vulkanen] The ring of fire #7: Gaia's hete inborst

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Mayor eruption Bezymianny
A major explosive eruption took place at Russia's Bezymianny volcano at 04:53 UTC on Friday, June 16, 2017. By 05:10 UTC, ash plume from the eruption reached an altitude of 12.2 km (40 000 feet) above sea level and a distance of 40 km (25 miles) NE of the volcano, according to the Tokyo VAAC. This is the strongest eruption of this volcano since September 2012.

At 05:43 UTC, KVERT said they raised the Aviation Color Code from Orange to Red. "Ash cloud as big as 28 x 25 km (17.4 x 15.5 miles) drifts to the northeast of the volcano," the Observatory said, adding that ash explosions up to 10 - 15 km (32 800 - 49 200 feet) a.s.l. could occur at any time. "Ongoing activity could affect international and low-flying aircraft.
This is the strongest eruption of Bezymianny volcano since September 1/2, 2012. It comes just two days after a powerful eruption of nearby Sheveluch volcano ejected ash to an altitude 12 km (39 360 feet) a.s.l. Sheveluch is located 90 km (56 miles) NE of Bezymianny.

The last significant eruption of Bezymianny volcano, although nowhere near today's, took place on March 9, 2017. Based on webcam observations, an ash plume rose to altitudes of 6 - 7 km (20 000 - 23 000 feet) a.s.l. and drifted 20 km (12.4 miles) northeast. The Aviation Color Code was raised from Yellow to Orange. About 30 minutes later, an ash plume rose to altitudes of 7 - 8 km (23 000 - 26 200 feet) a.s.l. and drifted 60 km (37 miles) northwest. Later that day a 274-km-long (170 miles) ash plume identified in satellite images drifted NW at altitudes of 4 - 4.5 km (13 100 - 14 800 feet) a.s.l.; the majority of the leading part of the plume contained a significant amount of ash. A lava flow traveled down the NW part of the lava dome.

Bezymianny is one the most active volcanoes in the world. In 1955, for the first time in history, it started to erupt, and after six months it produced a catastrophic eruption with the total volume of eruptive products over 3 km3.

The lava dome began to grow in the explosive caldera immediately after the catastrophe and still continues. At least 44 Vulcanian-type strong explosive eruptions of Bezymianny occurred between 1965 - 2012.

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Increased seismic activity at underwater Lō‘ihi volcano, Hawaii

Since the end of February 2017, the Hawaii Volcano Observatory (HVO) seismic analysts have noted a slight uptick in the number of earthquakes near underwater Lō‘ihi volcano. The quakes appear to be clustered roughly 10 to 12 km (6 - 7 miles) below sea level and extend from beneath the summit region of Lō‘ihi to the south. The most recent confirmed eruption of this volcano occurred in 1996.

From January 2015 through February 2017, there was, on average, one located Lō‘ihi earthquake per month. Since then, the rate of earthquakes has gradually increased. As of June 22 (the last HVO update on this matter), there have been 51 located earthquakes in the Lō‘ihi region.

"Without permanent seismic stations at Lō‘ihi, because the highest point of the volcano is 1 km (0.62 miles) underwater, it is not possible to locate earthquakes there as accurately as we can at Kīlauea or Mauna Loa," HVO said. "However, we can state that the June 2017 earthquakes appear to be clustered roughly 10 - 12 km (6 - 7 miles) below sea level and extend from beneath the summit region of Lō‘ihi to the south."

Interestingly, the roughly 170 earthquakes located in the area of Lō‘ihi between 2010 and 2016 occurred away from the summit region. They were primarily beneath the northern flanks of Lō‘ihi, and extended to significantly greater depths below the volcano. The significance of this difference is unclear, HVO says.

As early as 1952, HVO scientists interpreted occasional earthquake swarms in the Lō‘ihi region as reflecting active volcanism there. In fact, the earthquakes were key to recognizing that the seamount is actually an active volcano.

Earthquake activity alone does not conclusively indicate that Lō‘ihi is erupting. But the locations of recent earthquakes directly beneath the volcano's summit region plausibly suggest magmatic or volcanic origin, such as adjustments within the magma reservoir or volcanic edifice. "We would, however, expect to see many more earthquakes associated with an eruption," the observatory notes.

The most recent confirmed eruption of Lō‘ihi occurred in 1996. That year, an energetic earthquake swarm began in July and quickly intensified, motivating a scientific expedition to Lō‘ihi to seize an unprecedented opportunity to possibly observe a submarine eruption. Thousands of earthquakes, including over a dozen with magnitudes greater than 4.5, were recorded from beneath the summit and south flank of the volcano between July and September 1996.

Subsequent viewing and mapping of the Lō‘ihi summit region showed that, consistent with magma movement from beneath the summit area, a significant portion of it had collapsed. Fresh pillow lavas and glassy fragments collected during submersible dives also confirmed the occurrence of an eruption.

"Because Lō‘ihi is still so deep beneath the ocean's surface, the USGS regards Lō‘ihi as a low- to very low-threat volcano. Thus, there are no immediate plans for additional monitoring instruments and our views of Lō‘ihi for the foreseeable future will be strictly seismological," the observatory concluded.

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Mexican earthquake triggers eruption
Just as a devastating 7.1 magnitude earthquake rocked Mexico, the nation’s famed Popocatepetl volcano erupted, sending a plume of smoke in the air.

At the time of the eruption, a church in the town of Atzitzihuacan which is located on the slopes of the volcano, collapsed during the mass earthquake, killing 15 according to Reuters. The volcano is located just 40 miles southeast of Mexico City and can be seen from the capital city when the weather is clear.
Geologist and Forbes contributor Trevor Nace says it probably is not a coincidence that the eruption occurred shortly after the earthquake. “The volcanic eruption likely was triggered by shaking caused by the earthquake,” wrote Nace in an article in Forbes.

However, Mexico’s National Center for the Prevention of Disasters (Cenapred), which classified the eruption as “low-level” disputes that assertion.

“It is important to note that no significant increase has been observed in the activity of the volcano that can be related to the earthquake of magnitude 7.1, registered on September 19 with an epicenter in the state of Puebla,” wrote the agency (translated) in a press release.
Popocatepetl, which at 17,800 feet is North America’s second tallest volcano, is incredibly active.

After being largely dormant for most of the 20th century, it roared back to life in 1994 and has been irregularly but consistently active since then, according to Volcano Discovery.

According to the Cenapred website, Popocat�petl volcano emitted 299 low-intensity exhalations and an explosion during the same 24-hour period in which the earthquake occurred. During that same time, it also caused 6 volcano-tectonic earthquakes with magnitudes between 1.2 and 1.8.
On early Monday morning, before the earthquake, the volcano emitted a fumarole that shot ash 3 kilometers in the air.

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Op donderdag 21 september 2017 14:25 schreef Ener-G het volgende:
Gunung Agung op Bali schijnt ook op knappen te staan:

Bali Volcano Threatens to Erupt, Indonesia Raises Alert Level

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Vanuatu prepares to evacuate 5000 as Ambae volcano erupts

A web camera picture of the Ambae Volcano in Vanuatu on Saturday morning.A web camera picture of the Ambae Volcano in Vanuatu on Saturday morning. Photo: Vanuatu Geohazards Department
Authorities in Vanuatu were preparing to evacuate as many as 5000 people on Saturday, as a volcanic eruption on Ambae island continued to intensify.

The country's Geohazards Department on Saturday raised its alert from level three to four, what it classified as a "moderate eruption state."

The volcano is one of the most active in the world, but its activity has steadily increased in the past couple of weeks, said Esline Garaeviti, the manager of the Geohazards Department. On Saturday, that increased further, with the volcano belching ash across much of the 400sqkm island.

"In the early hours, around 3-4am, we noticed that the activity started to increase, followed by another eruptive phase," said Ms Garaeviti. "So the ash plume from Ambae is still there now. The ash fall is expected all around the island."

"The increased level of activity means increased area of risk," she said. "There's more risk exposed to people on the island, that's why. It's a moderate state of activity."

Ms Garaeviti stressed that the state of the eruption was only moderate, but there was every chance it could increase. However, authorities on the island, which sits between Santo and Pentecost about halfway up the archipelago, were swinging into action on Saturday.

Shadrack Welegtabit, the director of the Vanuatu National Disaster Management Office, said his officials weren't taking chances, and were preparing to start evacuating half of the island's 10,000 people from one side to the other.

"We are looking at moving people away from the south and north of the island, and moving them to the eastern and western part. We are working closely with the [Penama] Provincial Government on the ground arrangements," said Mr Welegtabit.

"It will be a big operation. We are talking about roughly 5,000 people that we have to move," he said. "Once all the ground arrangements is done in terms of preparing evacuation centres and stuff then we are looking at moving people. That is going to happen very soon."

"There has been a lot of ash fall in recent weeks, but as of last night there was a small eruption and people could see fire for the first time on that volcano," he said.

The last time there was a significant eruption on Ambae was in 2005, when a similar evacuation was carried out. It was as long as three months before people were able to return to their villages.

Both Ms Garaeviti and Mr Welegtabit said it was difficult to say whether the volcano's activity would intensify or start to settle down in coming days, but that every precaution was being taken.

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Vulkaan barst uit op Vanuatu: duizenden ge�vacueerd
Op de eilandenstaat Vanuatu, ten oosten van Australi� in de Stille Oceaan, is de noodtoestand uitgeroepen. Een vulkaanuitbarsting heeft de helft van de bevolking van het eiland Ambae gedwongen om toevlucht te zoeken tot nabijgelegen dorpen. De autoriteiten bereiden zich voor op een ergere uitbarsting. Mogelijk wordt het hele eiland ge�vacueerd, meldt Radio New Zealand.

De vulkaan Manaro in het midden van het eiland is al weken actief. Sinds het weekend is die activiteit sterk verhoogd met uitbarstingen. Een groot deel van Ambae ligt onder as.

Circa 5.000 dorpsbewoners van het noorden en zuiden van het eiland zijn ge�vacueerd naar het oosten en westen, in kampen van het rampenbeheer van Vanuatu.

,,Tot dusver heeft de vulkaan as en donkere rook uitgespuwd, met een beetje lava", vertelt Manuel Amu, de voorzitter van het rampenbeheercomit�, aan de radiozender. Volgens die zender groeit de schrik bij de ge�vacueerden omdat er steeds minder onderdak overblijft. Daarnaast maakten omwonenden melding van luidere uitbarstingen.

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Op woensdag 27 september 2017 14:26 schreef wattel het volgende:
De Popocat�petl vulkaan in Mexico is behoorlijk actief nu.

Volcán Popocatépetl en vivo desde Amecameca gracias a @SkyAlertMx

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Op dinsdag 26 september 2017 11:14 schreef Frutsel het volgende:
[ afbeelding ]

新燃岳、噴火警戒レベル３ 入山規制に引き上げ｜動画ニュース News24h

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Shinmoedake erupts
Kyushu's Mount Shinmoedake blew its stack for the first time in six years early Oct. 11, sending a plume of ash 300 meters into the air.

The eruption, although minor, followed the Japan Meteorological Agency's decision Oct. 5 to raise the volcano’s activity alert to Level 2, warning climbers to stay away from the crater.

The level was raised again Oct. 11 to Level 3, warning people to stay away from the mountain. It was the first such warning since October 2013 amid fears of a larger eruption that could hurl large cinders two kilometers from the crater.

No flying cinders were evident this time around.

The volcano, part of the Kirishima range in southern Kyushu, straddles the border of Miyazaki and Kagoshima prefectures. It previously erupted Sept. 7, 2011.

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Alert Level 1 up on Mayon Volcano

THE Philippine Institute of Volcanology and Seismology (Phivolcs) raised Alert Level 1 over Mayon Volcano after it recorded 10 earthquakes over the past 24 hours.

In a statement on Wednesday, Phivolcs said, however, that despite the “abnormal condition”, there was no imminent “magmatic eruption”.

Nonetheless, Phivolcs advised the public to refrain from entering the 6-kilometer Permanent Danger Zone (PDZ).

“Although this means that presently no magmatic eruption is imminent, it is strongly advised that the public refrain from entering the 6-kilometer radius Permanent Danger Zone (PDZ)”, Phivolcs said as it warned that rockfalls, landslides, and ash puffs may occur.

Mayon Volcano’s last recorded eruption was on September 2014.

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Op maandag 13 november 2017 18:35 schreef Resistor het volgende:
Even geen zin om het reguliere vulkanentopic op te zoeken, maar:
Livestream van https://en.wikipedia.org/wiki/Popocat%C3%A9petl in Mexico

El Volcán Popocatépetl en streaming

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Op maandag 13 november 2017 19:47 schreef thesiren.nl het volgende:

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El Volcán Popocatépetl en streaming

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Popocatepetl: Strongest eruption since 2013
On Thursday, November 23, 2017, Mexico's Popocatepetl volcano experienced its strongest eruption since 2013. Ashfall was reported in nearby communities, mainly to the south and southeast.

The eruption started at 20:13 UTC (14:13 local time), producing a plume of ash to around 1 800 m (5 900 feet) above the crater. That's 7 226 m (23 700 feet) above sea level.

"This is the largest activity since 2013," Carlos Valdes Gonzales, General Director of Mexico's National Center for Disaster Prevention (CENAPRED) said on Twitter.

The eruptive event was registered by the Tlamacas and Altzomoni stations, located 4.5 km (2.8 miles) and 12 km (7.4 miles) from the volcano, respectively.

Valdes reminded residents living near the volcano to cover their water sources, wear protective masks and do not let ash accumulate on light roofs.CENAPRED warns residents and tourists not to go near the volcano, especially near the crater due to hazard caused by ballistic fragments.

Espectacular explosíon del Volcán Popocatépetl 23 de noviembre 2017

Sobrevuelo al Popocatépetl 25 de noviembre 2017

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Second crater inside Popo discovered

The National Center for Disaster Prevention (Cenapred) shared a video of the overflight they made yesterday at the Popocat�petl volcano, where a second crater was discovered inside the volcano.

The director of Cenapred, Carlos Vald�s, announced that the interior crater has a diameter of 370 meters and 110 meters deep.
“There is no dome. It is considered an open system, which facilitates the release of recent ash emissions,” Vald�s wrote through his Twitter account.

The discovery revealed that in the coming days it is expected that the volcano will continue to throw new material towards the surface and that, gradually, the internal crater will be filled, at least by a mere partial new lava dome.

Therefore, the Cenapred urges people not to approach the volcano and especially the crater, because of the danger involved in spewing and falling fragments.
In addition, he informed that in case of heavy rains, stay away from the ravines posing danger of landslides and mudflows.

The “Popo” volcanic warning light is located in Amarillo Phase 2 .

Вулкан Безымянный. Пепловый выброс на высоту 15 км над уровнем моря. 2017-12-20 03:55 UTC_1

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Major eruption at Bezymianni volcano
A major eruption started at Bezymianni volcano, Kamchatka, Russia at 03:41 UTC on December 20, 2017. According to Tokyo VAAC, volcanic ash plume is reaching 15.2 km (50 000 feet) above sea level and drifting NE. In terms of ash cloud height, this is the strongest eruption anywhere on the planet this year.

The activity at the volcano started gradually increasing on Monday, December 18. According to video data by RAS, hot avalanches at the southeastern flank of the lava dome were observed for several hours, probably as a result of the extrusive eruption.

This activity, accompanied by strong gas-steam activity continued through early December 20 when strong ash explosions started at 03:41 UTC. Ash plume rose to about 8 km (26 000 feet) a.s.l., forcing authorities to raise the Aviation Color Code from Orange to Red.

At 04:09 UTC, ash plume/cloud was extending 20 km (12 miles) NE of the crater. By 04:20 UTC, it was already 85 km (53 miles) NE of the crater.

"Strong ash explosions up to 15 km (49 000 feet) a.s.l. occur at this time," KVERT said 04:47 UTC. "Ongoing activity could affect international and low-flying aircraft," they warned.

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St.Helens had four times as many earthquakes as usual

Mount St. Helens, an active volcano, had four times as many earthquakes than usual last month
Something wacky seems to be happening underneath Mount St. Helens.

Early today (Jan. 3), at least 17 earthquakes hit near the active volcano in Washington state, in rapid succession between 12:30am and 6:28am US Pacific time. The first and strongest registered a magnitude of 3.9 on the Richter scale, according to the Pacific Northwest Seismic Network.

Last month, University of Washington seismologists logged more than 80 quakes, a huge increase over the average 17 per month.

Mount St. Helens, 96 miles (154 km) south of Seattle, Washington and 50 miles (80 km) northeast of Portland, Oregon, is part of the Cascade Mountain Range that runs from northern California to British Columbia, Canada. It isn’t the only active volcano in the region—in fact, there are 12 other major volcanoes and nearly 3,000 other volcanic features in the Cascades—but scientists consider it the most active within the past 10,000 years.

Swarms of quakes around the Mount St. Helens are relatively common and do not always suggest a sign of impending eruption. Still, there have been a few instances in recent memory that have led the uptick in seismic activity to cause alarm.

The volcano’s most recent eruption, which occurred from 2004 to 2008, began with harbingers much like today’s: In the early hours of Sept. 23, 2004, a series of small-magnitude, shallow earthquakes rumbled through its lava dome. Over the next seven days, the frequency and size of the earthquakes increased and culminated in the first of several explosions on Oct. 1 2004. Fortunately, after initial steam and volcanic ash eruptions, the volcano only extruded semi-solid lava, which stayed relatively contained. By February 2008, the volcano quieted back down.

Mount St. Helens is most infamous for a 1980 eruption, which caused a horrifying level of devastation.

On May 18 that year, what had begun as tremors on March 20 culminated in a terrible explosion that blew off the volcano’s top 1,300 feet. The eruption caught the surrounding area unprepared and took the lives of 57, the deadliest volcanic event in US history. According to the US Geological Survey, most of the people who died likely did so from from asphyxiation after inhaling hot ash. Many of the victims’ bodies were also never found.

Presently, there seems to be no immediate danger of an eruption, according to geologist Trevor Nace, but scientists are continuing to monitor the situation. “While we can’t be certain,” Nace wrote in Forbes, “chances are the next time Mount St. Helen erupts, we will be significantly better prepared.”

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Dormant Kadovar volcano awakens, first eruption in known history, P.N.G.

More than 500 people living on Kadovar Island, East Sepik Province of Papua New Guinea have been evacuated following the first eruption of Kadovar volcano in known history. This volcano, dormant until yesterday, is part of the Schouten Islands, and lies off the coast of New Guinea, about 25 km (15 miles) N of the mouth of the Sepik River. The latest activity at this volcano was a period of heightened thermal phenomena in 1976. The Aviation Color Code for the volcano was raised to Orange. 50 - 60 percent of the island is already covered in lava.

Kadovar started erupting around 12:00 local time Friday, January 5, 2018 (02:00 UTC), prompting authorities to send out boats to evacuate more than 500 people living on Kadovar Island. The boats were sent from Kopar, the nearest island, some 30-minutes boat ride from Kadovar.

According to Loop PNG, immediately after sending boats to Kadovar, Kopar councilor Tom Kelly said that thick clouds can be seen rising from the island. "The clouds are darker and increasing at an alarming rate," Kelly said.

Places like Kairuru Island, Mt Uru in Yangoru and Woginara in the West coast of Wewak District are under thick clouds and dust, Loop PNG reported 00:53 UTC, January 6. Kairuru is not visible from Wewak and Mushu is covered by dust, it said.

In a Loop PNG article published 08:24 UTC, January 6, Ricky Wobar, Wewak District Administrator, said that the situation at Kadovar Island has worsened.

The statement was made after an overflight confirmed lava coming out of the once dormant volcano.

"At least 50 to 60 percent of the island is covered in lava," he said.

Wobar said they saw no evidence of inhabitants on the island, adding that he hopes all of them have been evacuated. The National Disaster and Emergency Services were called in to respond at the earliest tomorrow.

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Op zaterdag 6 januari 2018 13:33 schreef Frutsel het volgende:

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[ afbeelding ]

eerste eruptie ooit....

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Kadovar eruption could turn explosive posing risk of landslides or tsunami's
Following the first known eruption of Papua New Guinea's Kadovar volcano that took place on January 5, 2018, the Rabaul Volcanological Observatory (RVO) believes that the eruption could become explosive, posing a risk of landslides and tsunamis.

RVO said they based their belief on the chemistry of the most recent (pre-historic) cumulodome (high-silica andesite), Loop PNG reported January 7.

Landslides, and consequently tsunamis, are possible due to the steepness of the Kadovar Island, RVO said, adding that the risk is high for those on the island while residents on the mainland face a small risk of tsunamis.

Based on satellite imagery and aerial photographs, the eruption started with a mild vulcanian activity from a vent at the south-east base of the cumulodome, which occupies the summit's southeastward breached vent.

"It appears a fissure may be opening just inside of the western wall of the vent's breach, descending down to at least sea level," RVO said in their report to the Department of Mineral Policy and Geohazards Management (DMPGH).

The first eruption of this volcano in known history took place on January 5, 2018, although an unconfirmed eruption might have taken place in 1700, RVO said.

There was no other activity reported until an outbreak of thermal activity in 1976 and a short period of seismic unrest in 2015, the observatory said, adding that the volcano is very remote and communications are difficult, so minor unrest may have gone unreported.

According to local government sources, all residents of the island (some 700 - 800 people) have been evacuated and there are no reports of injuries.

Air Niugini, the national airline of Papua New Guinea, has canceled its Monday's flight to Wewak due to the dust and volcanic ash fallout over the Wewak township, the company said. The flight has been rescheduled to daylight operations on January 9, conditions permitting.