Strange Things are Afoot at the Circle K.: One or Two Quakes a Minute in Washington

Monday, September 27, 2004

One or Two Quakes a Minute in Washington

One or Two Quakes a Minute in Washington

"SEATTLE - Small earthquakes rattled Mount St. Helens at the rate of one or two a minute Monday, and seismologists were working to determine the significance of some of the most intense seismic activity in nearly 20 years...

...Sunday's activity was the most in a 24-hour period since the 1986 eruption, said survey geologist Willie Scott. Earthquake swarms in 1998 and 2001 did not result in any surface activity."

Wow, but what really interests me is something I noticed myself, something not mentioned in the story. The volcano seems to be running on some kind of three-year cycle:

1980: The last major Mt. St. Helens eruption which "killed 57 people, leveled hundreds of square miles of forests and dumped volcanic ash across the Northwest."
1983: Nothing. At least nothing mentioned in the story anyway. I'd like to see if there was anything happening with the volcano in ths year.
1986: "...the mountain's last lava-dome-building eruption occurred"
1989: Nothing Mentioned.
1992: Ditto.
1995: Ditto.
1998: Earthquake swarm like the one that's happening now.
2001: Another earthquake swarm.
And now, 2004: It's happening again.