This page uses the Three.js 3D JavaScript library to show real-time double-difference hypocenter locations of earthquakes in Northern California. The box below is centered on event 73888866, which has the following hypoDD-RT solution:
Date: 2023/05/16 | Time: 19:59:49.750 | Latitude: 40.22430 | Longitude: -121.12300 | Depth: 4.390 | Magnitude: 2.30
Quality: -9 | Shift: -9 | Version: 3.0The high-resolution background seismicity included in the box comes from two double-difference catalogs. Hypocenters for the years 1984-2011 are taken from the DD base catalog for Northern California (NCAeqDD.v201112.1). Hypocenters from 2012 up to present are taken from the real-time double-difference catalog DD-RT (NCAeqDDRT.v201201). Earthquakes from the DD catalog are represented by gray dots, those from the DD-RT catalog by colored dots.
There are 1660 earthquakes in the box. Magnitude cutoff is 1 (except for events within the last week).
Legend:
Viewer instructions:
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3D applet written by Robert Simpson (USGS), Felix Waldhauser and Eric Malikowski (LDEO).
Time created: Wed May 17 04:50:24 UTC 2023