Mt Hood Volcano | John Seach

john

Oregon, USA

45.37 N, 121.69 W, 
summit elevation 3426 m
stratovolcano

Mt Hood is Oregon's highest peak. It is located 75 km ESE of Portland. It is the only volcano in Oregon which has erupted historically. The summit area is composed of andesite and dacite domes. Solfatara activity has weakened the rocks and made them susceptible to slope failure.

The volcano poses a direct hazard to communities downstream due to the risk of pyroclastic flows and lahars during times of eruption.

2002 Earthquakes
A magnitude 4.5 earthquake occurred at Mt Hood volcano on 29th June 2002. Between 29th June and 15th August 2002, there were 200 aftershocks measured. The earthquakes occurred along two faults, and appear to be tectonic in origin, rather than volcanic.

Mt Hood Volcano Eruptions

1907?, 1869?, 1865-66, 1859, 1854?, 1853?, 1795 ± 5 yr, 1765 ± 5, 390 ± 150, 510 AD ± 150, 300 AD ± 200, 4940 BC ± 150.