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Large Explosion at Aso Volcano, Kyushu Island, Japan

Explosion from Aso’s Nakadake crater this morning (image: screenshot of RKK video)

A strong explosion occurred this morning, at around 11:43 local time, from the volcano.

During a phase of intense steam emissions, suddenly an explosion occurs that sends a large column of ash to several kilometers height as well as a dense, ground-hugging circular base surge that almost reaches the visitors’center. On the following embedded video, large ballistic projectiles can be seen ejected from the center of the explosion and landing in several hundred meter distance as well.

From the appearance of the eruption, it looks most likely as a phreatic type explosion, or steam-driven, as a larger pocket of overheated water under the crater suddenly flashed to steam and decompressed in the process, generating lots of block and ash fragments as well as dense and heavy turbulent mixtures that are seen rising and spreading from the center.

Courtesy of volcanodiscovery.com

https://tinyurl.com/49cdjy27

Elevated emissions of sulfur dioxide (SO2) at Vulcano volcano causes animal deaths and evacuations ordered in Eolian Islands, Italy

Sulfur emissions have been escaping from Vulcano (image: @mondoterremoti/twitter)

Due to elevated emissions of sulfur dioxide (SO2) from ground and finding dead animals, a small number of families has been evacuated from the village as reported volcanologist Marco Pistolesi on his twitter account.

The volcano observatory INGV raised the alert level for the volcano to “yellow” about two weeks ago, as increase of volcanic tremor and elevated fumarolic activity has been recorded.

Courtesy of volcanodiscovery.com

https://tinyurl.com/3nnxcyty

Volcanic Alert Level Raised to Red – New eruption at Kilauea Volcano in Halemaumau Crater, Hawaii, USA

A rapid rise of seismic activity and vertical deformation has been detected by the volcano observatory Hawaiian Volcano Observatory (HVO) as of noon today which is a sign that magma has been continued to intrude and pushed its way into deeper rock layers.

Onset of a new eruption started at the volcano in the afternoon of 29 September at about 15:20 local time as the observatory detected a glow in the Kilauea summit crater.

New eruptive fissures opened at approx. 15:21 local time at the bottom of the Halemaumau crater. These fissures opened east of the large island near the center of the lava lake. The opening of the vents was accompanied by low lava fountains and feeding new lava flows.

At about 16:43 local time, another vent opened on the west wall of the crater.

Gas and steam emissions continue at elevated levels.

Therefore, the alert level for the volcano was raised to red.

Courtesy of volcanodiscovery.com

https://tinyurl.com/38dv3dp9

Volcanic Alert Level Raised to Level 2 at White Island Volcano in New Zealand

Aerial view of White Island volcano with an ash and gas plume (image: @nzherald/twitter)

GeoNet reported that an observations during the gas flight confirmed the presence of fine ash material in the plume. The fine particles originate from the main steam vent at the back of the crater lake. Initial analyses of the ash particles suggest that it is loose material from around the vent or underlying conduit being carried by the steam and gas emission.

Some of the particles may be carried a few kilometres downwind but are unlikely to reach the mainland. The gas and steam plume may be noticed on the mainland as weak acid rain. While the gas output observed yesterday is higher than recent observations, other monitoring parameters do not show significant changes.

Observations from the flight show there is no substantial change in the location and size of active vents. The rainfall has formed a pool of water on the floor of the 1978/90 Crater, re-forming a shallow lakelet.

During the past week, a small sequence of earthquakes has been located close to the volcano and an increase of volcanic tremor has been recorded.

The main plausible triggers for a sudden eruption with little or no warning remain the collapse of unstable material in an active vent and the possible ingress of water underground onto the shallow magma body.

Courtesy of volcanodiscovery.com

https://tinyurl.com/y5rdhfwb

Alert Level raised to Yellow at Korovin Volcano in Andreanof Islands, Aleutian Islands

Yellow Alert

The Alaska Volcano Observatory (AVO) reported that the alert level for the volcano was raised to “yellow”, as an increase of seismic activity and sulfur dioxide emissions has been recorded.

The instruments record volcano-tectonic earthquakes over the past two weeks associated with sulfur dioxide (SO2) deggasing detected on 15, 20 and 26 October.

AVO will continue to monitor the volcano for signs of volcanic activity.

Courtesy of volcanodiscovery.com

https://tinyurl.com/yy3csksc

Volcanic Caribbean island of Dominica shaken by explosion of steam and gas #Explosion #Steam #Gas #Volcanic #Dominica #Caribbean

Volcanic Activity Alert

An explosion of steam and gas in the mountains of the remote, jungle-clad Caribbean island of Dominica has shaken residents, who are fearful it is a harbinger for renewed seismic activity in a nation that is home to nine volcanoes.

The Dominica Office of Disaster Management and the Seismic Research team said the activity in the Soufriere area on Wednesday was likely the result of a landslide, followed by subsequent geological adjustments.

In a statement, the office’s coordinator Fitzroy Pascal said there had been no volcanic earthquakes recorded in the area associated with “the strong steam degassing.”

“It is possible that the area may still be unstable and that additional landslides may occur with continued steam degassing,” Pascal said.

Dominica last suffered major phreatic or steam-drive volcanic eruptions in 1997, and before that in 1880.

Soufriere resident Lynthia Bellot said that residents were worried by the activity, after a series of small tremors in 2018 and 2019.

“A lot of residents are concerned, I was taken aback and I was like, if it is a landslide why is smoke coming out? I still do not understand it, I still do not get it,” she said.

Memories are fresh in Dominica of Hurricane Maria, which in 2017 killed 65 people and ruined housing stock and infrastructure, while some of the island’s oldest trees were destroyed.

Courtesy of wtvbam.com

https://tinyurl.com/yyuzo3o4