The 1980 eruption of Mount St. Helens is surpased by a volcano that was formed in 1912 located where?
Novarupta Novarupta (meaning "newly erupted" in Latin) is a volcano that was formed in 1912, located on the Alaska Peninsula in Katmai National Park and Preserve, about 290 mi southwest of Anchorage. Formed during the largest volcanic eruption of the 20th century, Novarupta released 30 times the volume of magma of the 1980 eruption of Mount St. Helens.
Medicine Lake Volcano Medicine Lake Volcano is a large shield volcano in northeastern California about 50 km northeast of Mount Shasta. The volcano is located in a zone of east-west crustal extension east of the main axis of the Cascade Volcanic Arc and the Cascade Range. The 1 km thick shield is 35 km from east to west and 45 to from north to south, and covers more than 2000 km2 . The underlying rock has downwarped by 0.5 km under the center of the volcano. The volcano is primarily composed of basalt and basaltic andesite lava flows, and has a 7 by caldera at the center.