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Fri, 20 Jan 2017
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Volcanoes


Fire

Dramatic video captures fiery eruption of Mexico's Colima volcano

© YouTube/webcamsdemexico (scren capture)
A fiery nighttime eruption of the Colima, Mexico, volcano shot ash and smoke over 6,500 feet into the air and could be heard 50 miles away, officials said.

The eruption Wednesday on the 12,000-foot mountain was the third major eruption this year, although the Volcanic Ash Advisory Center in Washington, D.C., part of the National Oceanographic and Atmospheric Administration, gave almost daily accounts of new ash in the atmosphere since Jan. 3, as well as a spectacular eruption on Dec. 27.

The mountain, one of 14 active volcanoes in Mexico, is on the country's west coast, between Colima and Jalisco states, 300 miles west of the capital, Mexico City.

The center's report of Wednesday's eruption cryptically noted, "Explosion seen on web cam. Based on models, any VA [volcanic ash] would be rapidly mov NE at 40-60 Kts [rapidly moving northeast at 40-50 knots, or 42-69 mph]."

Dramatic video of the eruption Wednesday was captured on a webcam located beyond the five-mile "exclusion zone" surrounding the mountain.


Arrow Up

Alaska's Bogoslof Volcano erupts again, sends ash cloud to 31,000 feet

© Alaska Volcano Observatory
An Alaska volcano active since mid-December has erupted again.

Bogoslof Volcano in the Aleutian lslands erupted at 1:20 p.m. Wednesday and sent up an ash cloud that pilots reported was estimated at 31,000 feet.

"Bogoslof volcano is in an active eruption sequence that began on December 16, though retrospective analysis suggests unrest may have started earlier in December," the Alaska Volcano Observatory website explained.

AVO raised the aviation threat code to red, the highest level. Ash clouds higher than 20,000 feet are a threat to intercontinental jet aircraft because ash can damage engines.

Satellite imagery indicates the cloud was moving to the northeast over the Bering Sea. AVO has no recording equipment on Bogoslof Island, but uses long-range equipment on nearby islands, as well as satellites, to monitor the volcano's activity.

Bogoslof Volcano is 850 miles southwest of Anchorage.

Comment: The Alaska Volcano Observatory says it has recorded about 20 explosive events at Bogoslof Volcano since it began erupting about a month ago.


Arrow Up

Increased volcanic activity for Bogoslof (USA), Bezymianny (Russia), Reventador (Ecuador), Lopevi (Vanuatu) and Nyamuragira (Congo)

© Hosteria Reventador
High numbers of explosions (29) at Reventador volcano in Ecuador.
This time, strong eruptions and changing alert levels for Bogoslof (USA), Bezymianny (Russia), Reventador (Ecuador) and Nyamuragira (Congo).

BOGOSLOF, ALEUTIANS ISLANDS, ALASKA

The level of seismic activity at Bogoslof volcano increased abruptly at about 20:23 (11:23 AKST) and persisted at a high level until about 20:29 UTC (11:29 AKST). Another strong abrupt increase in seismicity began at about 21:35 UTC (12:35 AKST).

Both events have been observed by pilots. The first event at 20:23 UTC produced an eruption cloud to 18,000 ft asl. The estimated height of the second event from 21:35 UTC was 14,500 ft asl.

Neither eruption cloud has been visible yet in subsequent satellite data. The altitude of the meteorological cloud deck is variable from about 10,000 ft to 12,000 ft.

It remains possible for additional ash-producing eruptions to occur at any time with limited precursory unrest and little warning. AVO is monitoring the volcano closely and will provide additional information if and when it becomes available.

Camera

Photographs show how recent eruptions at Alaska's Bogoslof volcano have changed island

© John Seese/NOAA, Dan Leary/Maritime Helicopters
Bogoslof Island in 1998 and on January 10, 2017.
A volcano in Alaska's Aleutian Islands has sent up two more ash clouds but neither reached 20,000 feet, the height as which ash becomes a major concern for intercontinental air carrier flights.

The Alaska Volcano Observatory says Bogoslof Volcano erupted at 11:23 a.m. Thursday and produced a cloud that reached 18,000 feet.

A second eruption at 12:35 p.m. sent up an ash cloud to 14,500 feet.

Both eruptions were seen by pilots.

Bogoslof is 850 miles southwest of Anchorage. The volcano has erupted more than 10 times since Dec. 16.

CBS affiliate KTVA reports that scientists are getting a unique look at how eruptions are changing the layout of Bogoslof Island and its volcano.

AVO geologist Chris Waythomas noted how the landscape has changed in a pair of photos taken nearly 19 years apart.

Comment: The last recorded eruption of Bogoslof was in 1992. The Aleutian Islands, with their 57 volcanoes, are in the northern part of the Pacific Ring of Fire, a region prone to frequent earthquakes and volcanic eruptions.




Attention

Earthquake triggers strong eruption at Sinabung volcano on Sumatra, Indonesia


Sinabung volcano
A strong explosion was recorded at Sinabung volcano on January 9, 2016.

It was triggered by a volcanic earthquake that occurred about 8 minutes before.

The powerful explosion occurred at 21:48 pm and sent a column of ash and gas 3km in the air.

There was a volcanic earthquake for 490 seconds when the eruption occurred.

Ashfall was recorded in Berastagi City.

An exclusion zone has been implemented in a radius of 3 km around the volcanic peak.



Sinabung volcano

Seismograph

Earthquake of magnitude 3.5 recorded at Bárðarbunga volcano, Iceland

© Páll Stefánsson.
Bárðarbunga.
An earthquake of magnitude 3.5 occurred in the northern caldera of Bárðarbunga volcano in Vatnajökull glacier shortly before noon yesterday. A few aftershocks followed, the largest of which measured 2.3 magnitude.

The Icelandic Met Office, which reported the seismicity, stated that there were no indications of volcanic activity in the area, ruv.is reports.

Bárðarbunga caused the 2014-2015 eruption in Holuhraun in the northeastern highlands.

Seismograph

Magnitude 3 earthquake recorded under Teide volcano, Canary Islands


Location of earthquake under Teide volcano
Teide volcano (Tenerife Island, Canaries): magnitude 3 earthquake under the volcano

A shallow magnitude 3 earthquake occurred almost directly under the summit of Teide volcano in 3 km depth today (at 12:18 UTC).

Whether the quake is volcanic in origin and might be a sign of a gradual reawakening of the volcano is impossible to say, but it is important to follow the volcano's seismic activity closely.

Fire

Pu'u 'Ō'ō volcanic show continues at Hawaii Volcanoes National Park

© NPS photo/Janice Wei
Four days after the huge delta collapse at the lava ocean entry at Kamokuna in Hawaii Volcanoes National Park, visitors are enjoying a new volcanic show.

National Park Service video taken by rangers on Tuesday, January 3, shows a "lava hose" streaming out of a severed tube and into the ocean. The active lava tube was exposed when 26-acres of new land suddenly broke off and fell into the sea on New Years Eve.

The lava viewing area inside the park had to be closed and relocated a short distance away.

Local lava photographer Tom Kualii captured the lava stream during the overnight hours in this remarkable video.


Comment: Part of Hawaii Volcanoes National Park collapses into ocean


Attention

Another eruption at Colima volcano in Mexico

© Dario Lopez-Mills/Associated Press
A large plume of ash rises from the crater of the Colima volcano, also known as the Volcano of Fire, on Saturday, Dec. 24, 2016.
One of Mexico's most active volcanoes has erupted, yet again.

Colima — known locally as the volcano of fire — spewed gas and ash into the air on Wednesday. An ongoing volcanic ash advisory, issued by the Volcanic Ash Advisory Center in Washington, remains in effect Thursday.

The volcano is in western Mexico, about 160 kilometres south of Guadalajara. Its eruptions date back to the 16th century, but have been steady since 1994.

The activity has intensified since last October, when nearby residents were evacuated as the volcano spewed lava. It is part of the Pacific Ring of Fire, the 40,000-kilometre volcanically volatile area home to about 75 per cent of the world's active volcanoes.

Colima's recent eruptions have created some lava domes, made from lava that has built up around the volcano's opening.

You can see multiple different views of the volcano in real-time here.



Attention

Green alert issued as Turrialba Volcano ashfall intensifies in Costa Rica

© Blas Sánchez/CNE
Turrialba Volcano continues to send ash towards the Central Valley in a series of prolonged eruptions beginning Dec. 28.
The National Emergency Commission (CNE) declared a Green Alert for the Central Valley on Thursday afternoon as Turrialba Volcano continued to pump ash intothe skies in the latest of the constant eruptions that have lasted throughout the past two weeks.

A statement from Casa Presidencial indicated that a combination of continued eruptions, a dry air system over Central America that has reduced the chance of rain, and strong winds have all contributed to the increase of ashfall in the area.

The CNE asks municipal emergency commissions to be vigilant, keep their communities informed and monitor ash levels. If people have to leave their houses in areas where significant ash is present, the government recommends that they cover their mouths and noses with towels or dust masks. The CNE also suggests not consuming food outdoors and to even avoid driving in areas with high ash levels.

On Thursday morning, the National University's Volcanological and Seismological Observatory of Costa Rica (OVSICORI) reported more ashfall being carried by southwest winds towards the San José metro area. Ash was seen covering cars and buildings Wednesday throughout the capital and the broader Central Valley, including as far north as Heredia and as far west as Escazú.