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Goat Rocks volcano

stratovolcano 2494 m / 8,182 ft
Washington, USA (mainland exept Alaska), 46.5°N / -121.45°W
Current status: (probably) extinct (0 out of 5)
Goat Rocks volcano books
Typical eruption style: Explosive
Goat Rocks volcano eruptions: 3 million - ca. 500,000 years ago
TimeMag. / DepthDistanceLocation
Wed, 19 Jul
Wed, 19 Jul 11:49 UTCM 0.6 / 1.1 km1 km- Mount Rainier area, Washington
Wed, 19 Jul 03:24 UTCM 1.0 / 2 km1 km- Mount Rainier area, Washington
Sat, 8 Jul
Sat, 8 Jul 16:45 UTCM 0.4 / 1 km1 km- 27km NNW of Packwood, Washington
Sat, 8 Jul 09:06 UTCM 0.2 / 1.3 km1 km- 27km NNW of Packwood, Washington
Sat, 8 Jul 08:44 UTCM 0.1 / 0.5 km1 km- 27km NNW of Packwood, Washington
View all recent quakes
Goat Rocks is the center a deeply eroded, glaciated volcanic center of a volcanic field 30 km (18 miles) north of Mount Adams, Washnington, USA.

Background:

Volcanism began approximately 3.2 million years ago with eruption of at least 650 meters of high-silica rhyolite tuff, which is exposed on the east flank of the subsequent Goat Rocks volcano.
Goat Ricks volcano itself was probably build between ca 2.5 - 0.5 million years ago. It produced large volume lava flows, most notably the 1.0 million-year-old Tieton Andesite, which reached ca. 80 kilometers eastward. It is the longest known andesite flow on Earth.
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Source: Wood and Kienle, (eds.), 1990, Volcanoes of North America - United States and Canada: Cambridge University Press., cited on CVO website.


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