BTTT quake-interest list.
NEIC: Near Real Time Earthquake List - Updated as of Sat Jun 29 20:45:07 UTC 2002.
DATE-(UTC)-TIME Latitude Longitude Depth Magnitude Q COMMENTS
2002/06/29 18:49:58 45.34N 121.68W 6.1 3.8 <SEA> WASH-OREGON BDR REG
2002/06/29 14:41:21 45.33N 121.68W 2.7 3.2 <SEA> WASH-OREGON BDR REG
2002/06/29 14:36:04 45.34N 121.69W 6.1 4.5 <SEA> WASH-OREGON BDR REG
Mt. St. Helens started with a 5+ earthquake as follows (source: 15 ):
"...The first hint of trouble came on March 20th, 1980, when the mountain gave a violent shudder, bouncing the Richter needle to 4.1. On March 27, the first eruption opened a crater and sent a plume of ash and steam 7,000 feet into the air. Quake followed quake in the next few weeks. Scientists had long expected this. Now they predicted a major eruption." Corps: Before the EruptionHere is the current earthquake map for Mt. Hood: Recent Earthquakes for 122-45[On May 18, 1980] "A magnitude 5+ earthquake at 8:32 a.m. set the blast in motion. Huge masses of rock began sliding down the mount's north flank, releasing gas pressure inside. Within seconds the whole north face exploded in a cloud of ash, rock fragments, and hot gases rushing northward at speeds up to 120 miles per hour. Once uncapped, the eruption continued vigorously until late afternoon. The top 1200 feet of the mountain rose in a billowing dark-gray plume of pulverized rock 11 miles high, and began drifting east. ..." Corps: The Crises and Response