Shishaldin volcano (Alaska, USA) activity update: lava flow on the northwest flank has increased in length and developed two branches

Вт, 5 ноя 2019, 07:38
07:38 AM | ПЇЅПЇЅПЇЅПЇЅПЇЅ: MARTIN
Lava branches on the northwest flank (image: Sentinel 2)
Lava branches on the northwest flank (image: Sentinel 2)
AVO reported that lava is overflowing the summit crater and the lava flow on the northwest flank has increased in length. Satellite data on Sunday afternoon show that the flow has developed two branches, each extending for about 1000 meters (0.62 miles). Volcanic debris flows (lahars) have also increased in length and now extend as far as 2 km (1.2 miles) on the north and south flanks.
Incandescence continues to be observed in overnight webcam images and satellite data show deposits of hot lava spatter on the summit cone due to minor explosive activity and/or lava fountaining.
Seismicity has decreased over the past 12 hours after an extended period of elevated high-amplitude tremor that was likely related to increased lava effusion.
Small explosions have also been observed on local seismic stations and detected in regional infrasound data. No significant ash emissions observed in satellite or web camera data.
Source: Alaska Volcano Observatory volcano activity update 4 November 2019

Предыдущие новости

Thu, 31 Oct 2019, 10:00
Lava filled the crater and overflowed the north crater rim (image: Sentinel 2)
Seismicity and infrasound signals were consistent with low level eruptive activity and a steam plume was persistent. ... Read all
Wed, 30 Oct 2019, 06:00
AVO reported that by 28 October two stalled lava flows extended as far as 1.8 km down Shishaldin's NW flank, lahars had traveled at least 4 km down the NW flank, and trace ash deposits on the N flank were identified in satellite images. Activity paused during 29-30 October but resumed on 31 October. Numerous small explosions were detected by the local seismic network during 31 October-1 November and incandescence was visible in webcam images. ... Read all
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