Mount Adams volcano eruptions

stratovolcano 3742 m / 12,277 ft
Washington State (Canada and USA (mainland)), 46.21°N / -121.49°W
Eruption list: 950(?), 200(?), 300 BC (?), 400 BC (?), 550 BC ± 1000, 1850 BC, 2650 BC ± 300, 2950 BC ± 100, 3250 BC ± 300, 3550 BC (?), 3800 BC ± 1000, 4050 BC ± 500, 4550 BC (?), 5150 BC ± 500, 7050 BC ± 1000


20 Oct 1997 rock avalance reaching 5 km on east flank

A large rock avalanche with a volume between 1-5 million m3 of rock happened on the morning of 20 October on the uninhabited east flank of Mt Adams. It traveled 5 km and lasted several minutes.
The avalanche temporarily dammed Big Muddy Creek to form a temporary lake, but did not cause damage to structures or life, because there are no settlements in the area.
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