At 10:34:24 (UTC) on December 20, 2022, a magnitude 6.4 earthquake occurred on the Northern California coast near Ferndale.
Geophysical Events
Geophysical Event
M 6.4 Ferndale, California
Image
- Magnitude
- M 6.4
- Location
- 15km WSW of Ferndale, CA
- Depth
- 17.9 km
- Coordinates
- 40.525, -124.423
Shakemap
ShakeMap, developed by the USGS, facilitates communication of earthquake information beyond just magnitude and location. By rapidly mapping out earthquake ground motions, ShakeMap portrays the distribution and severity of shaking.
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Finite Fault
Finite fault models generated by the USGS generally employ a kinematic finite fault inversion in the wavelet domain.
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Did You Feel It
The USGS collects information from people who felt an earthquake and creates maps that show what people experienced and the extent of the damage.
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Earthquake Browser
Explore millions of earthquakes on a Google map. View epicenters in 2D, or rotate through hypocenters in 3D. Options allow changing Time, Magnitude, Depth, and more.
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Nearest GPS stations
Epicenter and GPS/GNSS stations within 158 kilometers, where displacement of at least 2 centimeters is predicted.
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Long-term GPS station velocities
Long-term average velocities of GPS/GNSS stations in the region.
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Coseismic Displacement
This plot shows the ground displacement measured by GPS stations due to the earthquake. (Data credit: Tom Herring/MIT. Image credit: Christine Puskas/EarthScope.)
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Borehole instruments map
Borehole stations within 500 kilometers of the epicenter (shown by circle).
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Borehole strainmeter data
Measured strain at nearby borehole station B934.
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Borehole seismometer data
Borehole seismometer data arranged by distance from the epicenter. (Amplitudes are normalized for ease of viewing.)
ViewGround Motion Visualization
Data-generated visualizations show how the ground moves across the U.S. as seismic waves from moderate local or large distant earthquakes move across the surface of the Earth.
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Event Plot
Suite of plots that are automatically generated following all earthquakes of magnitude 6 or greater that examine different facets of an earthquake.
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Surface-Wave Radiation Patterns
Initial quick-CMT solutions are available within minutes of an event and are later updated to full GCMT solutions when updates arrive.
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EQ Energy
Earthquake energy is a measure of the kinetic energy released through seismic waves during an event
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Moment Tensor
Initial quick-CMT solutions are available within minutes of an event and are later updated to full GCMT solutions when updates arrive.
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Seismic Data Access
Download time series data based on this event.
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Project Support Services
Request instruments or other types of support for PI projects.
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GPS magnitude estimate
Event magnitude estimated by data at GPS/GNSS stations (horizontal motion only).
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GPS magnitude estimate
Event magnitude estimated by data at GPS/GNSS stations (including vertical motion).
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Footnotes
Technical
These data are provided by the Geodetic Facility for the Advancement of Geoscience (GAGE) Facility, operated by EarthScope Consortium with support from the National Science Foundation and the National Aeronautics and Space Administration under NSF Cooperative Agreement EAR-1724794. To acknowledge use of these data please follow the acknowledgment guidelines.