Tag: CalVO

Volcano Hazards Program CalVO Medicine Lake volcano

Medicine Lake Volcano from a distant northern view.



Medicine Lake volcano is situated just east of the Cascade Volcanic Arc axis in northern California’s high desert 55 km (35 mi), northeast of Mount Shasta. Also known as the Medicine Lake Highlands, this volcanic region covers a total area of about 2,200 km2 (850 mi2), extending approximately 80 km (50 mi) north-south and 50 km (30 mi) east-west. A shallow, but wide (7×12 km, 4.3×7.5 mi) caldera basin containing its namesake lake is located at the summit of the volcano. Intermittent, mostly effusive (non-explosive) eruptions over the last half-million years produced this large, shield-shaped volcano. In the last 13,000 years, effusive flank eruptions created expansive lava flows with single flows covering as much as 195 km2 (75 mi2). Two-thirds of Lava Beds National Monument, on the north flank of the volcano, is covered by one such flow. Seven of the nine eruptions of
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