Go to the Earthquake Hazards Program Real-time Earthquake Map. There are three columns which make up the real-time earthquake map. The left column comprises the list of earthquakes, the center
Report an earthquake experience or related observation through the Did You Feel It? citizen science webpage.
The maps and lists show events which have been located by the USGS and contributing agencies within the last 30 days.
The USGS and networks contributing to the Advance National Seismic System (ANSS) take great effort to provide accurate and timely earthquake information. Occasionally our systems produce errone
Seismologists evaluate the hypocenter location and the focal mechanism of an earthquake to decide if the earthquake occurs on a named fault.
Can I get on a list to receive an email message when there is an earthquake? How do I sign up for earthquake notifications? Are there any Feeds I can subscribe to?
Yes, please go to Earthquake Notification Services (ENS) to sign up for free emails or text messages to your phone, or check out the many different
1. If we get information (alerts) from any of the tsunami centers or 2. For any earthquake, magnitude 5.0 or greater, that occurred in
The USGS often updates an earthquake's magnitude in the hours and sometimes days following the event. Updates occur as more data become available for analysis and more time-intensive analysis is performed.
10 km is a "fixed depth". Sometimes data are too poor to compute a reliable depth for an earthquake. In such a case, the depth is assigned to be 10 km. In many areas around the world, reliable depths tend to average 10 km or close to it.
Seismic signals are transmitted in real-time by radio, satellite, telemetry, and land lines from remote seismic stations to one or more of the four centers.
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