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The map above is an earthquake epicenter map for
the Pacific Northwest portion of the United States.
(An epicenter is the location on earth's surface that
is directly above the source of an earthquake.) This
map shows the epicenters of earthquakes that occurred
in the two weeks prior to July 11th, 2004. The color
of each square corresponds to the time of the earthquake
and the size of the squares corresponds to the strength
of the earthquake.
The map was produced by the Pacific
Northwest Seismographic Network. Their website
displays a continuously updated version of this map.
Full USA earthquake mapping can be found at the USGS
Earthquake Hazards Program website.
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