This page uses the 3D JavaView viewer to show real-time double-difference hypocenter locations of earthquakes in Northern California. The box below is centered on event 72173786, which has the following hypoDD-RT solution:
Date: 2014/02/24 | Time: 02:00:21.570 | Latitude: 38.84499 | Longitude: -122.83288 | Depth: 2.999 | Magnitude: 0.40
Quality: 2 | Shift: 0.845 | Version: 0.1The high-resolution background seismicity included in the box comes from two double-difference catalogs. Hypocenters for the years 1984-2009 are taken from the DD catalog for Northern California (NCAeqDD.v200912.1). Hypocenters from 2010 up to present are taken from the real-time double-difference catalog DD-RT (NCAeqDD-RT.v201001). Earthquakes from the DD catalog are represented by gray circles, those from the DD-RT catalog by colored circles.
There are 8568 earthquakes in the box. Magnitude cutoff is 2 (except for events within the last week).
Legend:
Viewer instructions:
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The 3D applet was written by Robert Simpson (USGS) and was adapted to run from within the real-time double-difference relocation system DDRT. Contact: felixw@ldeo.columbia.edu or simpson@usgs.gov.
Time created: Mon Feb 24 02:17:34 UTC 2014