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Bizarro Earth

Alaska's Bogoslof volcano sends ash cloud up 9,100 metres (30,000 ft.)


Financial Post
Tue, 27 Jun 2017 18:19 UTC
bogoslof volcano
A 14-minute eruption by an Alaska volcano sent an ash cloud to 30,000 feet (9,100 metres) in the Aleutian Islands. The Alaska Volcano Observatory says Bogoslof (BOH-gohs-lawf) Volcano erupted at 3:17 a.m. Tuesday.

Ash clouds above 20,000 feet (6,100 metres) can harm airliners flying between Asia and North America. The observatory raised the aviation alert code to "warning" level, the highest level.

Winds were blowing to the northeast, which would push a cloud into the Bering Sea. The observatory says the cloud was not expected to drop ash on Aleutian communities or the mainland.
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Bizarro Earth

Yellowstone Supervolcano earthquake swarm reaches 878 events in just two weeks

Hannah Osborne
Newsweek
Tue, 27 Jun 2017 18:01 UTC
Yellowstone earthquake map June 2017
© University of UtahLocation of the earthquakes that are part of the swarm as of June 26.
Over 800 earthquakes have now been recorded at Yellowstone supervolcano over the last two weeks, with the ongoing swarm taking place on the western edge of the National Park. But there is virtually no risk of the volcano erupting, the United States Geological Survey (USGS) currently lists the volcano alert level as normal and the aviation color, which lists the potential risk to fights, is at green.

The current earthquake swarm began on June 12. A week later, the USGS put out a statement to say that 464 earthquakes had been recorded, with the largest being magnitude 4.4 "This is the highest number of earthquakes at Yellowstone within a single week in the past five years," it said.

At the time, a spokesperson for the USGS told Newsweek appeared to be "slowly winding down," adding that "no other geological activity has been detected." However, in a newly released statement about the ongoing swarm, seismologists from the University of Utah said 878 events have now been recorded at Yellowstone National Park.

Comment: 770 earthquakes in Yellowstone Park in 2 weeks: 'More than normal' say scientists
Yellowstone supervolcano is hit by 464 earthquakes in just one week

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Arrow Up

Alaska's Bogoslof volcano sends ash and steam plume over 36,000 feet high


Volcano Discovery
Sat, 24 Jun 2017 08:45 UTC
Bogoslof seismic signal
© AVOSeismic signal of this morning's eruptions at Bogoslof (recorded on MSW station on Makushin volcano about 60 km to the E
After a calmer period of approx. 10 days, another significant and quite large explosive eruption occurred at the volcano earlier today (yesterday afternoon local time).

The main pulse of the eruption which lasted about 10 minutes began at 00:49 UTC (16:49 local time) this morning and generated an ash and steam plume that quickly rose to 36,000 ft (12 km) altitude as pilots reported that were en route in the area and saw the cloud.

The ash plume moved east, passing over Akutan and the North Pacific Ocean before dissipating. No ash falls were reported from ground locations.

After the main explosion, 4 additional minor events occurred at 3:18-3:24 UTC, 4:13-4:21 UTC, 5:04-5:12 and 5:52-5:55 UTC. Due to cloud cover, there were no direct observations, meaning that the additional ash plumes did not reach more than 28-30,000 ft altitude.

The Aviation Color Code of Bogoslof was raised to RED. The volcano observatory (AVO) mentions that the "volcano remains at a heightened state of unrest and in an unpredictable condition. Additional explosions producing high-altitude volcanic clouds could occur at any time."

Comment: Three volcanoes are restless on the Alaska Peninsula

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Attention

Rincón de la Vieja volcano eruption blasts over 2000 meters in Costa Rica

Laura Alvarado
The Costa Rica Star
Fri, 23 Jun 2017 09:03 UTC
Blasts at Costa Rica's Rincón de la Vieja Volcan
Blasts at Costa Rica's Rincón de la Vieja Volcan
The National University's Volcanology and Seismology Research Institute (OVSICORI), reported an eruption at the Rincón de la Vieja Volcano in Guanacaste at 2:56 p.m. this Friday, June 23, where the column reached 2000 meters above the crater and 3,916 meters above sea level, (12844.48 ft).

According to the report by OVSICORI, the eruption registered is phreatomagmatic, which means it results from the interaction between magma and water. This type of eruptions usually contains juvenile magmatic clasts.

The activity was short, only lasting one minute, There are no reports of ash-fall for the time being, but the explosive and violent eruption caused once again a small pyroclastic flow, meaning a current of hot gas and volcanic matter such as rocks that heads down the north slope of the volcano forming a lahar. The lahars that form as a product of eruptions in this volcano usually affect the rivers Pénjamo, Azul and Quebrada Sufrosa.

Volcanologists recommend staying away from these rivers since the water level can increase suddenly.

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Attention

Yellowstone Supervolcano is hit by 464 earthquakes in just one week

Tim Collins
Daily Mail
Wed, 21 Jun 2017 11:54 UTC
A swarm of hundreds of earthquakes have hit Yellowstone National Park, the highest number within a single week in the past five years.
A swarm of hundreds of earthquakes have hit Yellowstone National Park, the highest number within a single week in the past five years.
Hundreds of earthquakes have hit Yellowstone National Park in the space of a week, according to experts. A total of 464 quakes have been recorded over the past week at Yellowstone, which sits above one of the world's most dangerous supervolcanoes.

This is the highest number of earthquakes at the park within a single week in the past five years. The recent activity has raised fears that the supervolcano is about to blow.

If it were to erupt, the Yellowstone supervolcano would be one thousand times as powerful as the 1980 Mount St Helens eruption, experts claim - although they say the risk is 'low'.
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Attention

Nishinoshima volcano erupting again on Ogasawara Island, Japan


The Mainichi
Tue, 20 Jun 2017 09:00 UTC
The island of Nishinoshima is seen dyed bright red by lava
© Meteorological Research InstituteThe island of Nishinoshima is seen dyed bright red by lava
Nishinoshima Island is erupting again after about a year and a half, and the level of volcanic activity is about the same as the 2014-2015 eruptions that saw the island's surface area expand at a remarkable rate, the Japan Meteorological Agency (JMA)'s Meteorological Research Institute announced on June 19.

Based on analysis of gases emanating from the volcano in the Ogasawara Island chain, the institute believes there is a steady supply of magma and the eruption is likely to continue for some time.

The JMA observation vessel Keifu Maru took the readings from May 25 to 27, and recorded Strombolian eruptions -- small to medium explosive lava eruptions -- about once every 46 seconds. The JMA also observed Vulcanian eruptions -- short and violent explosions -- about once an hour, scattering ash and other ejecta around the area. The volcano is spewing out about 500 metric tons of sulfur dioxide per day, indicating a high level of activity not seen on Nishinoshima since October 2015.
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Attention

Bezymianny volcano erupts in Russia with ash cloud 7 miles above sea level

Robert W. Felix
Ice Age Now
Fri, 16 Jun 2017 09:39 UTC
volcano
Propels ash more than 7 miles above sea level.

A major explosive eruption took place at Russia's Bezymianny volcano this morning (16 June 2017), propelling ash to 12.2 km (40 000 feet) above sea level, according to the Tokyo VAAC. It is the strongest eruption of this volcano since September 2012.

Bezymianny, now considered one the most active volcanoes in the world, erupted for the first time in recorded history in 1955. Within six months, it produced a total volume of eruptive products over 3 cubic kilometers (0.72 cubic miles).

For comparison, the 1980 eruption of Mount St Helens produced 1.3 cubic kilometers (0.3 cubic miles) of ash.

Prior to its 1955 eruption, Bezymianny had been considered extinct.

Thanks to Don Brown and Guy Wilson for this link
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Bizarro Earth

Powerful eruption of Sheveluch volcano sends ash to 12 km (39,360 feet)


The Watchers
Thu, 15 Jun 2017 17:40 UTC
Sheveluch volcano june 2017
© KVERT, IVS FEB RASAsh cloud at 20:40 UTC on June 14, 2017. A large content of ash particles is noted in red color.
A major eruption started at Russia's Sheveluch volcano at 16:20 UTC on June 14, 2017. KVERT reports a plume of ash reached a height of 12 km (39 360 feet) above sea level and warned explosions up to 15 km (49 200 feet) could occur at any time. The Aviation Color Code was raised from Orange to Red.

At 19:00 UTC, vast ash cloud (140 x 60 km / 87 x 37 miles) from the eruption was observed about 64 km (40 miles) to the southwest and 76 km (47 miles) to the northwest from the volcano, KVERT said at 19:32 UTC. By 20:20 UTC, ash cloud grew to 196 x 223 km (122 x 138 miles). Front of ash cloud with a large content of ash particles (67 x 54 km / 41 x 33 miles) was observed about 96 km (59 miles) north-northwest of the volcano, but the other front of ash cloud was 118 km (73 miles) southwest of the volcano.

By 22:30 UTC, ash cloud grew to 422 x 155 km (262 x 96 miles / 36 000 km2 / 13 900 mi2). Ash cloud with a large content of ash particles (84 x 55 km / 52 x 34 miles) was observed 131 km (81 miles) to the north-northeast. A general front of the largest ash cloud was observed 225 km (140 miles) to the northeast, and the other about 194 km (120 miles) to the southwest. By 06:00 UTC, the front of first ash plume was about 640 km (398 miles) to the ENE of the volcano, while the front of the second ash plume was about 294 km (182 miles) SW.

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Attention

Bogoslof volcano (Aleutian Islands, Alaska): new series of larger explosions


Volcano Discovery
Tue, 13 Jun 2017 11:16 UTC
Bogoslof Island, June 11, 2017. Photo taken from an Alaska Airlines jet enroute to Adak
© Cyrus Read, USGS/AVOBogoslof Island, June 11, 2017. Photo taken from an Alaska Airlines jet enroute to Adak
After a pause about approx. 2 days with little detected activity since the large explosion on 10 June, a new series of relatively strong explosions began early today at 1:47 UTC 13 June (17:47 local time AKDT June 12). At least two larger pulses of activity occurred, each lasting 10-30 minutes and producing ash plumes up to 25,000 ft (7.5 km) altitude that dissipated within 30 minutes.

According to the Alaska Volcano Observatory (AVO), the last such episode of explosive activity ended at 04:35 UTC this morning (20:35 AKDT June 12).

The ash from the latest eruptions is drifting SE toward Unalaska Island where minor ash fall could occur.

For the time being, the volcano has been calmer again during the past hours, but as similar explosive events are likely to occur again in the near future, the Aviation Color Code remains at RED.

Likely, the latest series of explosive eruptions have destroyed the lava dome observed on satellite data during the past week.
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Attention

Powerful explosions with loud detonations at Stromboli volcano, Italy


Volcano Discovery
Sun, 11 Jun 2017 17:32 UTC
Strong explosion from Stromboli's NW vent (S1) and a moderate one from the eastern (N2) vent on 11 June 2017 evening
Strong explosion from Stromboli's NW vent (S1) and a moderate one from the eastern (N2) vent on 11 June 2017 evening
The activity of the volcano remains at moderate to high levels. Compared to the update a few days ago, activity at the eastern vents (N1, N2) has decreased a bit, but instead increased significantly from the westernmost vent (S1).

When observed last night, powerful strombolian explosions from this vent, often accompanied by loud detonations, often reached or even exceeded 200 m height, and occurred at intervals of 5-10 minutes.

In total, only 4 of the 5 vents previously observed were active; the second vent (S2) in the western crater area
was not observed yesterday. The central vent only had rare (every 1-2 hours) mild strombolian bursts, but showed frequent mild spattering and intense lava glow.

Activity at the eastern vents was similar as described earlier, but weaker and not as frequent any more (N2: eruptions every 15-20 minutes; N1: eruptions every 30-60 minutes). During some of the more powerful explosions, the western (S1) and eastern (N2) main vents erupted simultaneously.
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