The events displayed on the map represent the most recent data collected from USArray stations that are currently stored at the ANF facility at Scripps Institution of Oceanography, University of California, San Diego.
All event locations are PRELIMINARY and are subject to change after human analyst review. If the Review status for an event is not 'y' (for 'yes'), the event has not been reviewed by an analyst.
The number of events plotted on the map, the oldest data plotted, and the most recent data plotted is listed in the top right of the map. You can set the page refresh time to see the latest events recorded and also preserve the zoom and location of the map (requires you to accept browser cookies) using the drop-down select box and 'Preserve zoom & location' button respectively.
Use the time slider in the top left of the map to define a start and end time of events to plot. Slide the left and right sliders to the time range you wish to see displayed and click the 'Replot' button.
There are a series of predefined views for this event map listed in the bottom left. Clicking a view button pans the map to the selected region.
What defines an 'event'?
A seismic event is typically an earthquake, however, mine blasts and other naturally occurring phenomenon can have a similar signal to our sensors. This interface does not differentiate between the seismic source.
|Latitude||Longitude||Magnitude||Depth (km)||UTC Time||Location||Author||Review status||Map|