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Iliamna volcano, Cook Inlet (SW Alaska): news & activity updates

Updated: Mar 28, 2024 19:50 GMT-

Iliamna volcano (Alaska Peninsula) - Smithsonian / USGS Weekly Volcanic Activity Report for 31 May-6 June 2023 (Continuing Activity)

Wed, 7 Jun 2023, 14:00
AVO reported that seismic activity at Iliamna began to increase at around 1200 on 5 June. Initially earthquakes occurred about every one minute, then became more closely spaced. The source of the activity was possibly from movement of magma or hydrothermal fluids beneath the volcano, though similar activity had been observed before large mass movements or avalanches; AVO could not rule out either. Read all

Iliamna volcano (Cook Inlet, SW Alaska): ice-rock avalanche followed earthquakes

Tue, 6 Jun 2023, 06:02
Vertical-component seismic waveforms and spectrograms from AVO station ILSW for the May 2016, June 2019, and June 2023 avalanches on Iliamna volcano (image: AVO)
Vertical-component seismic waveforms and spectrograms from AVO station ILSW for the May 2016, June 2019, and June 2023 avalanches on Iliamna volcano (image: AVO)
An elevated seismic activity occurred beneath the volcano yesterday. Read all
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Iliamna volcano
stratovolcano 3053 m / 10,016 ft
Cook Inlet (SW Alaska), 60.03°N / -153.09°W
Current status: normal or dormant (1 out of 5) Iliamna volcano eruptions:
1953(?), 1952(?), 1933(?), 1876, 1867, 1843(?), 1793(?), 1778-79, 1768(?)
radiocarbon-dated: 1650 ?, 450 BC ?, 2050 BC ?, 5050 BC ?
Typical eruption style
explosive