Sunday, April 24, 2016

GLOBAL VOLCANISM: The Latest Report Of Volcanic Eruptions, Activity, Unrest And Awakenings – April 20-24, 2016! [PHOTOS + VIDEO]

Sinabung volcano. Endro Lewa

April 24, 2016 - EARTH - The following constitutes the new activity, unrest and ongoing reports of volcanoes across the globe.

Sinabung (North Sumatra, Indonesia): The Sinabung is always active in recent days.

Great photos of Firdaus Surbakti and Endro Lewa allow to detail the evolution of the pyroclastic flow of April 20.

Beidar Sinabung

Beidar Sinabung

Beidar Sinabung

Endro Lewa

Santiaguito (Guatemala): Another large eruption occurred at the Caliente dome yesterday morning, at around 6 am, with a new series of collapses that generated pyroclastic flows and an impressive ash plume that rose approx. 3 km above the lava dome.

Santiaguito volcano in Guatemala. Matthew Karsten

Ash plume from Santiaguito. Carlos Ventura / Prensa Libre

Carlos Ventura / Prensa Libre

According to INSIVUMEH, the source of the collapses is the continued supply of viscous lava that extrudes into the summit of the Caliente dome, and the collapse and pyroclastic flows affected its eastern side.

Ash fall occurred in areas to the west and southwest in up to 25 km distance, including the towns of Cuyotenango, San Francisco, Zunilito and Pueblo Nuevo.

WATCH: Santiaguito volcano erupts.

Masaya (Nicaragua): The lava lake in the volcano's summit crater continues to be very active and its level has risen a bit during the past days, INETER reports.

View of Masaya's lava lake. INETER crater webcam

Seismic activity, including tremor reflecting the degassing of the lava lake, fluctuates at moderate to high levels.

Pavlof (Alaska Peninsula, USA): Seismic activity at the volcano has continued to decrease over the past two weeks and no anomalous activity has been detected in satellite data since weakly elevated surface temperatures were seen on April 8.

AVO is therefore lowering the aviation color code to GREEN and the Volcano Alert Level to NORMAL.

Langila (New Britain, Papua New Guinea): Darwin VAAC reported ash emissions from the volcano that rose to 7,000 ft (2.1 km) altitude and drifted up to 100 km north.

Aviation color code is at orange.

Alaid (Northern Kuriles, Kuril Islands): Eruptive activity on the remote volcano continues; satellite images show fresh ash deposits and evidence a strong heat source from the crater.

Satellite image of Alaid, showing ash-darkened snow. Terra satellite / NASA

Heat signal from Alaid volcano. MIROVA

Kliuchevskoi (Kamchatka):  The volcano continues to be in mild to moderate strombolian activity.

Strombolian activity at Klyuchevskoy volcano.Yury Demyanchuk

Dukono (Halmahera, Indonesia): Intense ash emissions continue from the volcano.

Dukono's ash plume. Aqua / NASA satellite image

This morning, VAAC Darwin reported a plume at approx. 7,000 ft (2.1 km) altitude extending 50 km to the NE, well visible on satellite images.

Nevados de Chillán (Chile):  New ash emissions occurred yesterday morning, generating a small plume that rose approx. 500 m.

Small ash emissions from Nevados de Chillán volcano. SERNAGEOMIN

According to Sernageomin, this activity is not caused directly by fresh magma, but related to disturbances of the shallow hydrothermal system which interacts with an underlying, probably only small body of magma.SERNAGEOMIN also reported a slight increase in earthquakes typical of internal fluid movements (LP- long period events) during the past weeks and that sporadic ash emissions are likely to continue.

The volcano's alert level remains at "yellow" and it is recommended to stay outside a radius of 2 km around the active craters

Popocatépetl (Central Mexico): Following Monday's large explosive activity (2 hours of lava fountaining), the volcano returned to be relatively calm, producing only steam emissions and no significant explosions.

Steam emission ("exhalation") from Popocatepetl volcano.

Bright glow remains visible from the summit, indicating that magma continues to rise and accumulate at the summit vent.

Suwanose-jima (Ryukyu Islands, Japan):  The strombolian-type activity from the volcano on the small island in southern Japan continues to be elevated.

Ash plume from an eruption at Suwanose-jima volcano. JMA webcam

Frequent explosions produce small to moderate ash plumes that rise to altitudes of 5-7,000 ft (1.5-2 km).

Constant glow is visible from the O-take crater at night.

Soufrière Hills (Montserrat): On the island of Montserrat, heavy rains have eroded and re-mobilized the eruptive ash deposits in the Belham Valley, creating lahars there and making of this a dangerous area.

Lahars in the Belham Valley. MVO

The activity of the volcano Soufriere Hills, remains unchanged, characterized by a plume of gas blown northwards towards uninhabited areas. The alert level remains at 1.

Etna (Sicily, Italy): At Etna, ash emissions are noticed on the night of April 20 to 21, still visible the next morning at the northeast and new southeast craters.

 EtnaLive site states, based on the latest multidisciplinary INGV Catania report on the April 19th, that at the level of Bocca Nuova, the crater floor collapsed gradually, to produce the formation of a new crater in the fossa.


Bocca Nuova Etna - the red arrow indicates the collapse. INGV Catania

Etna summit craters - with legend. Joseph Nasi / Butterfly helicopters Service

Nevado del Ruiz (Colombia): The volcano produced a small ash plume today, Manizales volcano observatory reported to Washington VAAC.

Webcam views are obscured by weather clouds.Sporadic mild ash emissions have been occurring from the volcano from time to time during the past weeks.

- Volcano Discovery | MVO | INGV Catania | GVP.

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