Report on Alaid (Russia) — 16 November-22 November 2022
Smithsonian / US Geological Survey Weekly Volcanic Activity Report,
16 November-22 November 2022
Managing Editor: Sally Kuhn Sennert
Please cite this report as:
Global Volcanism Program, 2022. Report on Alaid (Russia). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 16 November-22 November 2022. Smithsonian Institution and US Geological Survey.
50.861°N, 155.565°E; summit elev. 2285 m
All times are local (unless otherwise noted)
KVERT lowered the Aviation Color Code for Alaid to Yellow (the second lowest level on a four-color scale) on 17 November noting that activity had been gradually decreasing since the last ash plume was recorded on 26 October. A thermal anomaly continued to periodically be identified in satellite images when weather conditions permitted views, though the temperature of the thermal anomaly began decreasing on 29 October. Dates are based on UTC times; specific events are in local time where noted.
Geological Summary. The highest and northernmost volcano of the Kuril Islands, Alaid is a symmetrical stratovolcano when viewed from the north, but has a 1.5-km-wide summit crater that is breached open to the south. This basaltic to basaltic-andesite volcano is the northernmost of a chain constructed west of the main Kuril archipelago. Numerous pyroclastic cones are present the lower flanks, particularly on the NW and SE sides, including an offshore cone formed during the 1933-34 eruption. Strong explosive eruptions have occurred from the summit crater beginning in the 18th century. Reports of eruptions in 1770, 1789, 1821, 1829, 1843, 1848, and 1858 were considered incorrect by Gorshkov (1970). Explosive eruptions in 1790 and 1981 were among the largest reported in the Kuril Islands.