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Ebeko volcano (Paramushir Island, Northern Kuriles, Russia) field report: frequent ash explosions (updated with video)

Freitag Aug 02, 2019 10:56 | VON: T

Strong explosion from Ebeko with 2 km ash plume and pyroclastic flow towards the left seen from Severo Kurilsk town at 10:30 local time on 20 July 2019 (image: Tom Pfeiffer / VolcanoDiscovery)
Strong explosion from Ebeko with 2 km ash plume and pyroclastic flow towards the left seen from Severo Kurilsk town at 10:30 local time on 20 July 2019 (image: Tom Pfeiffer / VolcanoDiscovery)
During our pilot expedition to the northern Kurile Islands, we observed the volcano during 16-20 and 26-27 July 2019: Ebeko's northern crater was very active, almost constantly degassing and producing ash-rich eruptions at irregular intervals of typically few hours.
About half of them consisted in small to moderate, but passive ash venting, while the others were explosions that generated ash plumes of typically 1-2 km height and drifting / slowly dissipating rather long distances (few tens of km) mostly towards the NW. Due to the lack of significant rain lately, the extremely fine-grained brown-gray ash itself seems to cover much of the northern part of the island. Near the volcano (within approx. 2 km), it forms a deposit about 1 cm thick.
Ebeko's stronger explosions were sometimes noisy and ejected abundant blocks, some of which were incandescent during the night. In addition, most of the explosions, even smaller ones, produced rather large and abundant volcanic lightnings. The strongest explosions also generate small pyroclastic flows reaching several 100 m length from the base of the crater cone.
VAAC Tokyo reports only a fraction of the actually occurring events, mainly because most ash plumes remain hidden in the typically thick cloud or fog cover over the area.
Here's participant Martin Rietze's fantastic video showing a strong eruption during the first night including abundant volcanic lightning:
Vorherige Nachrichten
AP press photo (provided by Louis and Kathleen Nevzoroff via USGS) of Korovin eruption on 23 Feb., 2005.
Samstag, Feb 26, 2005

Added on 10 March:

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