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

Nearby Earthquakes (Last 7 Days)

3.6
1 km NE of Ridgemark, CA
57 min ago · 6.9 km deep
2.5
18 km SSE of Silver Springs, Nevada
12 hours ago · 1.8 km deep
2.5
15 km SSW of French Gulch, CA
1 day ago · 49.5 km deep
2.8
4 km W of Cobb, CA
2 days ago · 2.2 km deep
2.6
11 km E of Silver Springs, Nevada
2 days ago · 13.5 km deep
2.6
22 km NNE of Yerington, Nevada
2 days ago · 8.6 km deep
2.6
20 km SE of Silver Springs, Nevada
3 days ago · 9.2 km deep
3.4
19 km ESE of Silver Springs, Nevada
3 days ago · 4.0 km deep
2.8
18 km SSE of Silver Springs, Nevada
3 days ago · 8.1 km deep
3.0
2 km NNE of Middletown, CA
4 days ago · 4.0 km deep

Actions

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Understanding This Data

Magnitude 2.1 earthquakes are typically only recorded by instruments.

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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 May 17, 2026 from https://www.earthquaketracker.org/earthquakes/event/nc75288746/