How Often Do We Have Earthquakes?

Tools

By By Steve Pool

SEATTLE - The University of Washington Seismology Department says typically, the Northwest gets about 1,000 quakes a year greater than a magnitude of 1.0, but only about 25 or so are strong enough to be felt -- usually at least a 2.5 or 3.0 magnitude.

As far as damaging quakes go, there have been 25 in Washington and Oregon since 1872 in which about 17 people have been killed.

In the greater Puget Sound region, we've had 12 quakes of magnitude 5.0 or larger since 1900, so that averages out to roughly one every 8 years, but they can come in bunches.

Seattle went 30 years (1965-1995) without a quake over 5.0, but have had four in the eight years since.

For More Information:

UW Seismology Lab -- www.geophys.washington.edu

Your Photos

YouNews Moonrise taken from Entiat WA. Moonrise taken from Entiat WA.
Moonrise over Orondo WA taken from Entiat WA. I waited a long time for the moon to rise in this area. Shot with a 600mm lens.
YouNews Near Full Moon Jet Near Full Moon Jet
These are various frames from a video taken Wednesday night
of a jet passing in front of the Apogee Moon. An Orion
short tube 80mm telescope and an Imaging Source Video Camera
were used to take these images.
YouNews 8yr Pure Athleticism, Talent and Heart 8yr Pure Athleticism, Talent and Heart
My son Keoni Bananola Lamar is 8yr old. The video is when he was 6yrs. He started doing flips on a trampoline in his grandma back yard when he was 5yr. From the first time he got on the trampoline I knew he was fearless.