Volcanic activity worldwide 27 Aug 2015: Colima volcano, Shiveluch, Dukono, Tungurahua, Piton de la ...
Thu, 27 Aug 2015, 08:0708:07 AM |
Steaming and ash emission from Shiveluch this morning
Evolution of tremor amplitude at Raung volcano (VSI)
Cotopaxi volcano spewing ash this morning
Seismogram of Tungurahua's BMAS station showing the tremor that began at 03h05 (TL) and was followed by five explosions (05h57, 06h26, 07h02, 07h52 and 09h44)
Shiveluch (Kamchatka): Lava extrusion into the volcano's lava dome continues at moderate intensity. Small incandescent avalanches are sometimes visible on night-time webcam images. Steaming and weak to moderate ash emissions accompany this activity.
Steam, gas and ash plume from Sabancaya yesterday
Manam (Papua New Guinea): Ash emissions occurred Tuesday (25th), producing a plume at 8,000 ft (2.4 km) altitude that extended 100 km to the west. (Darwin VAAC)
Raung (East Java): A few days ago, the official alert level of the volcano has been lowered to 2 (out of 4). It seems that no, or almost no eruptive activity has taken place at the volcano over the past days.
What probably was the volcano's most significant eruption in at least 100 years, is probably over.
Dukono (Halmahera): Activity remains intense. Darwin VAAC spotted ash emissions that rose 1-2 km above the volcano and drifted up to 100 km to the west.
Colima (Western Mexico): Activity seems to have decreased over the past days. Explosions have been much weaker and almost absent recently.
Cotopaxi (Ecuador): No significant changes have occurred. The volcano continues to produce near-continuous ash plumes that rise 1-2 km above the summit and drift into westerly directions.
Volcanic tremor is continuous at the moment.
Tungurahua (Ecuador): Activity at the volcano increased since Tuesday (25 Aug), the volcano observatory reported.
From 03:05 local time, seismic activity increased with the appearance of tremor accompanying ash emissions. Black, hence likely juvenile (from fresh magma) ash fell on Chontapamba Pillate, Bilbao and Juive Grande is recorded. Subsequently, 5 explosions were recorded starting at 05:57. The intensity of these increased progressively, the strongest occurring at 08:05.
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Sabancaya (Peru): The volcano's activity remains more or less unchanged. It continues to produce a weak steam and thin ash plume that rises 500-1500 m above the summit crater.
INGEMMET reports continuing seismic activity that suggests a slow ongoing magmatic intrusion at depth (5-20 km under the volcano, the location of 60 volcano-tectonic quakes during 18-24 Aug).
Piton de la Fournaise (La Réunion): The eruption that began last Monday continues. Lava output is much lower now (approx 10 cubic meters / second) than in the beginning (30 cu m/s), but more or less stable.
Bad weather during the past two days prevented more detailed observations. A heavy cloud of volcanic vog (SO2 droplets) encompasses most of the Enclos and parts of the southern La Réunion island.
Tue, 25 Aug 2015, 21:00
Mon, 24 Aug 2015, 15:51
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