Event 75174521 M=1.70 - 3D View

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 75174521, which has the following hypoDD-RT solution:

Date: 2025/05/01 | Time: 13:09:54.710 | Latitude: 40.49370 | Longitude: -124.47570 | Depth: 17.760 | Magnitude: 1.70
Quality: -9 | Shift: -9 | Version: 2.0

The 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 88 earthquakes in the box. Magnitude cutoff is 1 (except for events within the last week).

This viewer requires JavaScript

Legend:

  • Red dot is hypoDD-RT solution for event 75174521 (M=1.70)
  • Events in previous HOUR | DAY | WEEK
  • DD-RT catalog (2010-present) (M>1)
  • DD catalog (84-09) (M>1)
  • Larger dots: M>4
  • White dot is original (NCSN) location
  • Brown lines at surface: faults from USGS
  • Top square of the bounding box has green/blue sides, blue on the North.
  • XYZ box dimensions (km) = 15.0 x 15.0 x 15.0.


    • Viewer instructions:

    Left-Mouse Drag to rotate
    Middle-Mouse / Scroll-Wheel / s Drag to scale
    Right-Mouse / d Drag to translate
    r Reset view
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    3D applet written by Robert Simpson (USGS), Felix Waldhauser and Eric Malikowski (LDEO).
    Time created: Mon May 12 22:22:43 UTC 2025