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


CBS News
Thu, 12 Jan 2017 21:49 UTC
Bogoslof Island changes size
© 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.



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Attention

Earthquake triggers strong eruption at Sinabung volcano on Sumatra, Indonesia


Strange Sounds
Tue, 10 Jan 2017 19:14 UTC
Sinabung volcano
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
Sinabung volcano
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Seismograph

Earthquake of magnitude 3.5 recorded at Bárðarbunga volcano, Iceland

Eygló Svala Arnarsdóttir
Iceland Review
Mon, 09 Jan 2017 20:02 UTC
Bárðarbunga.
© 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.
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Seismograph

Magnitude 3 earthquake recorded under Teide volcano, Canary Islands


Volcano Discovery
Fri, 06 Jan 2017 16:08 UTC
Location of today's earthquake under Teide volcano
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.
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Fire

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


Big Island News
Wed, 04 Jan 2017 00:54 UTC
NPS photo/Janice Wei
© 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

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Attention

Another eruption at Colima volcano in Mexico


cbc.ca
Thu, 05 Jan 2017 17:00 UTC
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.
© Dario Lopez-Mills/Associated PressA 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.


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Attention

Green alert issued as Turrialba Volcano ashfall intensifies in Costa Rica

Michael Krumholtz
The Tico Times.
Fri, 06 Jan 2017 16:41 UTC
Turrialba Volcano continues to send ash towards the Central Valley in a series of prolonged eruptions beginning Dec. 28.
© Blas Sánchez/CNETurrialba 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.

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Attention

Bogoslof Volcano in the Aleutians back at Red Alert

Zoe Sobel
kucb.org
Fri, 06 Jan 2017 16:34 UTC
A satellite image showing the volcanic cloud from Bogoslof's January 5, 2017 eruption.
© Dave Schneider, AVO/USGS
A satellite image showing the volcanic cloud from Bogoslof's January 5, 2017 eruption.
Two hours after lowering the aviation code for an Eastern Aleutian volcano, it's back at the highest alert level.

The reasoning? According to the Alaska Volcano Observatory, there was a significant explosion at Bogoslof volcano Thursday afternoon.

The observatory detected a raised level of seismicity around 1:30 p.m. as well as reports from the World Wide Lightning Detection Network of lightning strikes. A pilot reported seeing a volcanic cloud at 35,000 ft.

The volcano has been erupting since mid-December.
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Attention

Part of Hawaii Volcanoes National Park collapses into ocean

Debabrata Sabud
Latin Post.
Tue, 03 Jan 2017 18:20 UTC
A large plume of rock debris and gas emanates from the Kamokuna lava ocean entry within Hawaii Volcanoes National Park, just moments after the lava delta began to collapse.
© Travis Delimont A large plume of rock debris and gas emanates from the Kamokuna lava ocean entry within Hawaii Volcanoes National Park, just moments after the lava delta began to collapse.
Twenty-six new acres of Hawaii Island at the Kamokuna ocean entry from the 61g lava flow has collapsed into the ocean. It occurred on December 31, 2016, at 2.45 P.M on New Year's Eve.

According to HAWAI'I, the incident took place at Hawaii Volcanoes' National Park. This incident is launching showers of volcano rock into the air, and creating a flurry of large waves that eroded away a portion of the older sea cliff and viewing area.

As a result of this, the Kamokuna ocean entry within the park remains closed on Monday. The park rangers and USGS Hawaiian Volcano Observatory have currently surveyed the area to determine if and when it will be safe to reopen to visitors.

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Fireball 2

Meteor fireball streaks across Turrialba volcanic eruption in Costa Rica


RT
Fri, 30 Dec 2016 13:17 UTC
Mteor over Turrialba Volcano
© Costa Rica Hoy / YouTube
Witnessing a volcanic eruption is a spectacular sight on its own, but one such event in Costa Rica was made even more stunning earlier this week. A meteor danced across the night sky at precisely the same time.

The shooting star traveled across the top of the Turrialba Volcano at 10:22pm local time on Tuesday night, just as the volcano was erupting, according to the Costa Rica Star.

The fireball made its appearance while gliding across the sky at an estimated height of 5,000km (3,106 miles), according to Repretel TV station.

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