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 75149016, which has the following hypoDD-RT solution:
Date: 2025/03/15 | Time: 05:59:39.730 | Latitude: 36.84303 | Longitude: -121.56841 | Depth: 5.666 | Magnitude: 2.50
Quality: 1 | Shift: 1.414 | Version: 2.1The 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 5036 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: Tue Mar 25 01:22:10 UTC 2025