2.1

M2.1 Earthquake 24 km NW of Petrolia, CA — September 20, 2025

2025-09-20 14:43:38 UTC (2025-09-20) · approx. 6:43 AM UTC-8 local

MagnitudeM2.1(md)
Time14:43 UTC≈ 6:43 AM UTC-8
Depth20.3 kmshallow crustal
Coordinates40.449°, -124.513°
Felt byNo felt reports
Status✓ Reviewed by USGS
Map showing earthquake epicenter at 40.45°, -124.51°

Earthquake Details

Magnitude
2.1 md
Depth
20.3 km
shallow crustal
Location
40.4490°N
-124.5132°E

Technical Information

Event ID
nc75239867
Event Type
earthquake
Status
✓ Reviewed
Significance
69
Stations Used
42
Azimuthal Gap
250.0°
Min Station Distance
0.154°
RMS Residual
0.13 sec
Last Updated
2025-09-26 20:42:20 UTC

Nearby Earthquakes (Last 7 Days)

2.5
10 km ESE of Gilroy, CA
1 day ago · 5.1 km deep
3.0
13 km W of Petrolia, CA
1 day ago · 19.6 km deep
3.2
74 km W of Petrolia, CA
2 days ago · 10.7 km deep
2.8
20 km ESE of Silver Springs, Nevada
2 days ago · 8.6 km deep
3.0
7 km NW of The Geysers, CA
2 days ago · 2.5 km deep
3.0
23 km NE of Hydesville, CA
2 days ago · 4.4 km deep
2.7
19 km WSW of Petrolia, CA
4 days ago · 9.4 km deep
2.8
237 km W of Ferndale, California
4 days ago · 10.0 km deep
3.4
29 km W of Petrolia, CA
4 days ago · 0.7 km deep
2.6
13 km NNW of Gerlach, Nevada
4 days ago · 3.5 km deep

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: nc75239867). All scientific values on this page are sourced verbatim from the USGS feed.

Cite this page: EarthquakeTracker.org. (2025, September 20, 2025). M2.1 Earthquake 24 km NW of Petrolia, CA — September 20, 2025. Retrieved September 26, 2025 from https://www.earthquaketracker.org/earthquakes/event/nc75239867/