Shishaldin volcano (Alaska, USA) activity update: lava flow on the northwest flank has increased in length and developed two branches
Tue, 5 Nov 2019, 07:3807:38 AM | BY: MARTIN
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.
Lava branches on the northwest flank (image: Sentinel 2)
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
Thu, 31 Oct 2019, 10:00
Seismicity and infrasound signals were consistent with low level eruptive activity and a steam plume was persistent. ... Read all
Thu, 24 Oct 2019, 21:19
Satellite data is now showing that the deep summit crater has been filled and lava is starting to flow over the rim with spatter from Strombolian explosions also being deposited. This melted some of the thick ice sending a lahar halfway down the north flank. Elevated seismicity continues. Read all