2.1

M2.1 Earthquake 3 km W of Cobb, CA — December 30, 2025

2025-12-30 23:27:37 UTC (2025-12-30) · approx. 3:27 PM UTC-8 local

MagnitudeM2.1(md)
Time23:27 UTC≈ 3:27 PM UTC-8
Depth1.6 kmshallow crustal
Coordinates38.820°, -122.763°
Felt byNo felt reports
StatusAutomatic (preliminary)
Map showing earthquake epicenter at 38.82°, -122.76°

Earthquake Details

Magnitude
2.1 md
Depth
1.6 km
shallow crustal
Location
38.8198°N
-122.7630°E

Technical Information

Event ID
nc75288746
Event Type
earthquake
Status
Automatic
Significance
68
Stations Used
47
Azimuthal Gap
55.0°
Min Station Distance
0.012°
RMS Residual
0.05 sec
Last Updated
2025-12-31 01:22:20 UTC

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Actions

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Understanding This Data

Magnitude 2.1 earthquakes are typically only recorded by instruments.

Learn more about magnitude →

Authoritative source: USGS event page (event ID: nc75288746). All scientific values on this page are sourced verbatim from the USGS feed.

Cite this page: EarthquakeTracker.org. (2025, December 30, 2025). M2.1 Earthquake 3 km W of Cobb, CA — December 30, 2025. Retrieved December 31, 2025 from https://www.earthquaketracker.org/earthquakes/event/nc75288746/