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Sun, 22 May 2022
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Volcanoes


Attention

Iceland Reykjanes volcano update - Alert level raised, magma is on the move

Iceland Reykjanes Volcano

Iceland Reykjanes Volcano
The alert level of the Reykjanes volcano in Iceland was just raised from green to yellow. This change was made in response to the confirmation of a new intrusion of magma on the Reykjanes peninsula. This new intrusion is centered underneath the Svartsengi geothermal power plant, and is quite likely to result in a new volcanic eruption. If an eruption were to occur, it would be likely to have an explosive component to it and potentially affect the city of Grindavik. This video will discuss the odds of a new volcanic eruption and how explosive it might be.


Attention

Tonga eruption was 'record atmospheric explosion'

Weather satellites captured the climactic eruption.

Weather satellites captured the climactic eruption.
The eruption of the Tonga volcano in January has been confirmed as the biggest explosion ever recorded in the atmosphere by modern instrumentation.

It was far bigger than any 20th Century volcanic event, or indeed any atom bomb test conducted after WWII.

The assessment comes in a pair of scholarly papers in the journal Science that have reviewed all the data.

Of recent history, it's likely only the Krakatoa eruption of 1883 rivalled the atmospheric disturbance produced.

That catastrophic event in Indonesia is thought to have claimed more than 30,000 lives. Fortunately, the 15 January climactic eruption of the underwater volcano at Hunga Tonga-Hunga Ha'apai (HTHH) in the south Pacific resulted in very few deaths, even though it too produced large tsunamis.

"Tonga was a truly global event, just as Krakatau was, but we've now got all these geophysical observation systems and they recorded something that was really unprecedented in the modern data," Dr Robin Matoza, from the University of California, Santa Barbara, told BBC News. He is the lead author on one of the papers.


Attention

This week in volcano news - Yellowstone earthquake, unrest at Andes supervolcano

Big Ben

Big Ben
In the last week, there was significant seismic activity at a supervolcano. One of these supervolcanoes has an ongoing intrusion of magma at 3 miles or 5 kilometers depth in Chile and could produce an eruption in the next several months.

Also, in Yellowstone National Park, a magnitude 4.2 quake occurred which led some people to speculate that it was volcanic in origin. And, in Australia, the nation's most active volcano produced a new eruption, sending a lava flow 2.5 kilometers downslope.

This video will discuss these volcano related news stories, as told and analyzed by a volcanologist.


Fire

This week in volcano news - A new eruption in Vanuatu, increased activity at Mutnovsky

Gaua volcano

Gaua volcano
In the last week, several volcanoes in the Galapagos Islands have been showing signs of unrest meaning that another eruption may soon occur. Also, in Vanuatu, the Gaua volcano produced its first explosive eruption in more than a decade. Meanwhile, in Russia's Kamchatka, the highly active Mutnovsky volcano has been showing signs of unrest through a very high emission of sulfur dioxide gas. This video will discuss these volcano related news stories, as told and analyzed by a volcanologist.


Bizarro Earth

Long dormant underwater volcano in Antarctica triggers 85,000 earthquakes

The swarm of 85,000 earthquakes was the strongest seismic outburst ever recorded in Antarctica.

Antarctica Volcano
© Joseph Sohm; Visions of America via Getty Images
A long-dormant underwater volcano near Antarctica has woken up, triggering a swarm of 85,000 earthquakes.

The swarm, which began in August 2020 and subsided by November of that year, is the strongest earthquake activity ever recorded in the region. And the quakes were likely caused by a "finger" of hot magma poking into the crust, new research finds.

"There have been similar intrusions in other places on Earth, but this is the first time we have observed it there," study co-author Simone Cesca, a seismologist at the GFZ German Research Centre for Geosciences in Potsdam, told Live Science. "Normally, these processes occur over geologic time scales," as opposed to over the course of a human life span, Cesca said. "So in a way, we are lucky to see this."

The swarm occurred around the Orca Seamount, an inactive volcano that rises 2,950 feet (900 meters) from the seafloor in the Bransfield Strait, a narrow passage between the South Shetland Islands and the northwestern tip of Antarctica. In this region, the Phoenix tectonic plate is diving beneath the continental Antarctic plate, creating a network of fault zones, stretching some portions of the crust and opening rifts in other places, according to a 2018 study in the journal Polar Science.

Fire

This week in volcano news - Mount Rainier earthquake swarm, large eruption at Karymsky

karymsky volcano

Karymsky volcano
In the last week, several major volcano related news stories broke. In Washington state, the dangerous volcano known as Mount Rainier produced a swarm of earthquakes directly underneath its glacier covered peak. Meanwhile in Alaska, part of the Aleutians received large volumes of sulfur dioxide which originated from a very large eruption of the Karymsky volcano in Russia. And, in New Zealand, the Ruapehu volcano is continuing to show signs of unrest as it has been producing its longest period of volcanic tremor since 2002.


Fire

This week in volcano news - Volcanic activity near Sitka, Iceland earthquake swarm

VOLCANO

In the last week, several major volcano related news stories broke. In Alaska, the Mount Edgecumbe volcano near the town of Sitka produced an unexpected swarm of several hundred earthquakes, suggesting that magma is on the move at depth.

Meanwhile in Australia, strong thermal signatures were detected on Heard Island, indicating that a new eruption may have begun. And, in Iceland, a series of earthquake swarms occurred near the Blue Lagoon hot springs, which may have been volcanic in origin. This video will discuss these volcano related news stories, as told and analyzed by a volcanologist.


Fire

Spectacular volcanic eruption of Nevado del Ruiz, Colombia

erupts
The Geological Survey of Colombia reported that the Nevado del Ruiz volcano erupted around 5 pm on April 11.

A column of ash, gases and steam reached a height of 3300 meters.

A huge column of ash was visible from several cities in the center of the country, such as Manizales, Ibague and others.

The locals were frightened by this impressive phenomenon, which can be very dangerous.


Fire

This week in Volcano News: Eruption report at Agung, new eruption at Poas

Poas volcano

Poas volcano
There are currently 51 volcanoes actively erupting on the planet. While the Karangetang volcano is continuing to produce viscous lava flows, several developments have occurred at other regional volcanoes.

In Japan, the Kirishima volcano is continuing to show signs of unrest as a series of volcanic earthquakes expanded to a group of 2 vents.

In Indonesia, the Agung volcano was widely reported by news outlets to have erupted when in fact no such eruption ever occurred. Meanwhile, in Costa Rica, the Poas volcano produced its first eruption since 2019.

This video will discuss these volcano related news stories, as told and analyzed by a volcanologist.


Fire

Ebeko volcano eruption Kuril Islands, Russia

Ebeko volcano eruption today Kuril Islands.