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Volcanic activity worldwide 20 Feb 2014: Kelud, Shiveluch, Poas, Dukono, Tungurahua, Sakurajima, Aso...

Thursday Feb 20, 2014 17:59 PM |

Glow from the active lava dome of Shiveluch this morning (KVERT webcam)
Glow from the active lava dome of Shiveluch this morning (KVERT webcam)
Small ash emission from Aso yesterday
Small ash emission from Aso yesterday
Degassing plume of Kelut yesterday (photo: Aris Yanto)
Degassing plume of Kelut yesterday (photo: Aris Yanto)
Small mud eruption at Poás on 14 Feb (Image: OVSICOR-UNA via faceook)
Small mud eruption at Poás on 14 Feb (Image: OVSICOR-UNA via faceook)
Explosion from Tungurahua yesterday evening
Explosion from Tungurahua yesterday evening
Shiveluch (Kamchatka): Activity at the volcano remains elevated. The lava dome extrudes currently 2 lobes of viscous lava, a larger one on the NW side and a smaller one on the SE side, which seems to have appeared around 16 Feb. The active parts of the dome suffer frequent small to moderate-sized avalanches (mainly from the NW side). Bright glow can be seen at night.
A larger collapse on 18 Feb caused a pyroclastic flow that reached a length of approx. 3 km and an ash plume that rose to 23,000 ft (7 km) altitude.
... [read more]

Chirinkotan (Northern Kuriles): SVERT reported that a thermal anomaly over Chirinkotan was observed in satellite images on 12 and 15 February, and steam-and-gas emissions were observed on 16 February. Cloud cover obscured views on other days during 11-17 February. The Aviation Color Code remained at Yellow.
(from: Smithsonian/USGS Weekly Volcanic Activity Report 12-18 February 2014)

Aso (Kyushu): JMA reported that a very small explosion from Asosan's Nakadake Crater occurred on 16 February and yesterday morning. In both cases, a steam plume with some ash rose 300 m above the crater rim and drifted S. The Alert Level remained at 2 (on a scale of 1-5).

Sakurajima (Kyushu, Japan): Eruptions have been stronger again during the past days. In the 4 days since 16 Feb, at least 6 vulcanian-type explosions were recorded with ash plumes rising up to 12,000 ft (3.7 km) altitude.

Suwanose-jima (Ryukyu Islands): An explosion occurred at the volcano yesterday, VAAC Tokyo reported. The height of the ash plume was unknown.

Kelud (East Java): The volcano itself remains relatively calm and produces only a degassing plume. So far, no clear picture has been available about what exactly is going on at the crater itself (e.g. whether a new lava dome is forming).
The biggest problem at the moment are lahars, mud flows that form when rain water mixes and remobilizes loose deposits. These mud flows can carry boulders of meter size and are extremely destructive (imagine flowing cement with mixed-in large debris of all sorts). It is estimated that approximately 50 million cubic meters of tephra deposits from the 13 Feb eruption could be remobilized by the rains in the coming days, weeks and months to come. Areas most at risk are river valleys and their river banks.
... [read more]

Dukono (Halmahera): New ash plumes were spotted this morning by VAAC Darwin on satellite imagery. Ash clouds at approx. 7,000 ft (2.1 km) altitude drifted 80 nautical miles to the east. Probably strombolian activity seems to be relatively intense at the volcano.

Kilauea (Hawai'i): (19 Feb) 43 earthquakes were strong enough to be located beneath Kilauea Volcano in the past 24 hours - 9 of them were on the south flank faults!
...18 Feb:
The tiltmeter at Pu`u `O`o recorded the start of DI deflation tilt at 9 pm yesterday - around 14.5 hours after the summit DI deflation tilt!

Poas (Costa Rica): A very small phreatic or hydrothermal eruption occurred a week ago. OVSICORI-UNA shared a picture showing a geyser-like ejection of mud from the crater lake. Activity in any case seems to have risen. Karin Leonard who lives at Poas wrote us:
"Poas in Costa Rica is becoming active, there are reports on the local news. We feel lots of tremors and rotten egg gas is more common.
... [read more]

Tungurahua (Ecuador): Overall, the volcano's visible activity has continued to decrease with fewer and weaker explosions, although seismic activity remains moderate to high. The strongest explosion in the past days was one yesterday evening that produced an ash column rising 3 km, a powerful cannon-shot explosion sound. Bombs fell around the crater at distances of 500 m.
Previous news
Steaming from Kelut this morning (new VSI webcam)
Tuesday, Feb 18, 2014
Kelud (East Java): Activity has calmed down at the volcano. The new VSI webcam shows the outer crater area covered with heavy ash deposits and only a small steam plume from the crater. ... [more]
Aerial view of Popocatépetl's summit crater (image: CENAPRED)
Monday, Feb 17, 2014
Kilauea (Hawai'i): The tiltmeters at the summit of Kilauea and at Pu`u `O`o cinder cone both recorded continued DI inflationary tilt over the past 24HRS! ... [more]
Currently active lava flows at Etna's New SE crater
Sunday, Feb 16, 2014
Etna (Sicily, Italy): Activity has remained essentially unchanged. Weak lava effusion from the fissure vents at the eastern flank of the New SE crater as well as sporadic strombolian explosion continue, accompanied by low tremor levels. ... [more]
Explosion at Bocca Nuova crater (Montagnola webcam, INGV Catania)
Saturday, Feb 15, 2014
Etna (Sicily, Italy): This morning at 12:08 (local time) a moderate phreatic explosion occurred from the Bocca Nuova crater. ... [more]
The eruption of Kelut last night (image: pic.twitter.com/ypy7kx9615 / @hilmi_dzi)
Friday, Feb 14, 2014
Kelud (East Java): BNPB (Civil protection) confirmed 3 fatalities (indirectly or directly) caused by the eruption: two as result of breathing difficulties caused by the ash, one as a road accident during evacuation. All of the victims were in Pandasari village less than 7 km from the volcano where 20 cm of ash has fallen. ... [more]

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