GEOLOGY

Detailed explanation-1: -Earthquake hazards have been recognized as one of the major natural hazards in Oregon since the late 1980s, a result of the geologic research to identify and characterize the Cascadia subduction zone and crustal faults. The March 1993 Scotts Mills earthquake (M5. 6) and the September 1993 Klamath Falls earthquakes (M5.

Detailed explanation-2: -The two states that tend to get the most earthquakes on average are California and Alaska. Other states with high amounts of seismic activity include Nevada, Hawaii, Washington state, Wyoming, Idaho, Montana, Utah, and Oregon.

Detailed explanation-3: -California has more earthquakes that cause damage than any other state. Alaska and California have the most earthquakes (not human-induced).

Detailed explanation-4: -Abstract. At 5:34 a.m. on March 25, 1993, much of northwestern Oregon and southwestern Washington was shaken by one if the largest historic earthquakes ever observed in the region. The Richter magnitude 5.6 earthquake occurred near the small town of Scotts Mills, 48 km south of Portland, Oregon.