2.5

M2.5 Earthquake 21 km W of Petrolia, CA — September 21, 2026

2026-09-21 22:41:51 UTC (5 hours ago) · approx. 2:41 PM UTC-8 local

MagnitudeM2.5(md)
Time22:41 UTC≈ 2:41 PM UTC-8
Depth10.5 kmshallow crustal
Coordinates40.304°, -124.536°
Felt byNo felt reports
StatusAutomatic (preliminary)
Map showing earthquake epicenter at 40.30°, -124.54°

Earthquake Details

Magnitude
2.5 md
Depth
10.5 km
shallow crustal
Location
40.3035°N
-124.5358°E

Technical Information

Event ID
nc75439702
Event Type
earthquake
Status
Automatic
Significance
96
Stations Used
22
Azimuthal Gap
274.0°
Min Station Distance
0.174°
RMS Residual
0.17 sec
Last Updated
2026-09-22 00:22:22 UTC

Nearby Earthquakes (Last 7 Days)

3.0
21 km WSW of Petrolia, CA
8 hours ago · 5.7 km deep
2.7
22 km SSW of Manton, CA
2 days ago · 16.4 km deep
2.5
10 km ENE of Milpitas, CA
2 days ago · 2.7 km deep
2.6
17 km W of Petrolia, CA
3 days ago · 8.6 km deep
2.6
2 km ENE of Aromas, CA
4 days ago · 0.6 km deep
2.6
21 km E of Alum Rock, CA
5 days ago · 6.3 km deep
3.5
20 km WSW of Petrolia, CA
5 days ago · 20.1 km deep
3.8
20 km WSW of Gerlach, Nevada
5 days ago · 7.0 km deep
2.7
3 km ESE of Santa Rosa, CA
6 days ago · 9.1 km deep
3.3
17 km WSW of Petrolia, CA
6 days ago · 9.0 km deep

Actions

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Understanding This Data

Magnitude 2.5 earthquakes are typically only recorded by instruments.

Learn more about magnitude →

Authoritative source: USGS event page (event ID: nc75439702). All scientific values on this page are sourced verbatim from the USGS feed.

Cite this page: EarthquakeTracker.org. (2026, September 21, 2026). M2.5 Earthquake 21 km W of Petrolia, CA — September 21, 2026. Retrieved September 22, 2026 from https://www.earthquaketracker.org/earthquakes/event/nc75439702/