Visit REQ2, Our New
Interactive Recent
Earthquakes Page
![Earthquake Index Map](https://webarchive.library.unt.edu/web/20090115192557im_/http://www.pnsn.org/recenteqs/index_map.gif)
Click on an earthquake on the map above to zoom in.
Did you feel it? -
Report an Earthquake
ShakeMaps -
Washington and Oregon
Special maps -
Mount St. Helens ||
Seattle Region
| What earthquakes are shown on the map? |
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Maps are updated within 5 minutes of an earthquake and once an hour on the hour (note that a further delay of up to 5 minutes
may take place while the page is uploaded to our webserver). |
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An automatic, computer-generated, epicenter is shown if an earthquake a) has an automatic preliminary magnitude
exceeding 1.7, b) is recorded by at least 10 seismic stations, c) is less than 80 km deep.
Automatic, unreviewed, locations must meet 2 further quality criteria to appear: d) location uncertainty
less than 10 km, e) timing uncertainty (rms misfit) of 1.5 s or less.
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After review by an analyst, earthquakes as small as magnitude 1.0 or with depths greater than 80 km are also posted.
The review status of an earthquake may be found by clicking on an epicenter.
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Earthquakes more than two weeks old are removed. |
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Try to reload this page if you do not have the most current map. |
Big earthquake list ||
All earthquake list
Lists of M > 3 earthquakes and of all earthquakes appearing on the above map.
About Real-time Earthquake Maps
Frequently Asked Questions, Data Sources, Credits and Disclaimer,
Glossary, Other Sites that Host these Maps.
Old version of maps without sidebar
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