Plot showing
magnitude-frequency
relation of earthquakes
Plot your own map of historic events for a given region
More seismicity maps
|
18 h 54 min 31 sec |
47.17N 122.73W |
7.0M |
49.0 km |
|
Tectonic setting of this earthquake Most earthquakes in this region are subduction zone earthquakes. As the oceanic plate subducts beneath the continental plate, large compressive forces build up. Slip along the plate interface manifests as earthquakes. The animation on the left
shows typical fault motion for this region. More fault animations More about
plate movement and boundaries (To USGS) |
| Frequency of such earthquakes | |
|---|---|
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The map on the left shows all earthquakes (yellow circles) that
have occurred in the region from 1973 to the present
with magnitude greater that 5.0. The red star shows
the epicenter of this earthquake and the black lines
represent plate boundaries
(click map to enlarge - new window will open)
Plot showing
magnitude-frequency
relation of earthquakes |
| Seismic Waves | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Earthquakes generate seismic
waves which travel through the earth. The map shows the time at which
p-waves generated by this earthquake arrived at a few cities world wide.
In general, seismic wave amplitudes at any location on earth are dependent
on the magnitude of the earthquake and the distance from the earthquake.
If the seismic waves are large near an urban center, extensive loss of
human life and damage to human property may result. (click map
to enlarge - new window will open)
More about seismic
waves | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||