3.0

M3.0 Earthquake 8 km SSE of Olancha, CAApril 20, 2026

2026-04-20 00:53:48 UTC (16 hours ago)

On April 20, 2026 at 00:53 UTC, a magnitude 3.0 shallow crustal earthquake struck 8 km SSE of Olancha, CA, at a depth of 2.5 km and coordinates 36.2122°, -117.9775°.

Map showing earthquake epicenter at 36.21°, -117.98°

Earthquake Details

Magnitude
3.0 ml
Depth
2.5 km
shallow crustal
Location
36.2122°N
-117.9775°E
Felt Reports
1
DYFI responses
Community Intensity
3.4
CDI from reports

Technical Information

Event ID
ci41445272
Event Type
earthquake
Status
✓ Reviewed
Significance
139
Stations Used
38
Azimuthal Gap
48.0°
Min Station Distance
0.104°
RMS Residual
0.18 sec
Last Updated
2026-04-20 14:26:39 UTC

Common Questions

How strong was the magnitude 3.0 earthquake near Olancha, CA?

The magnitude 3.0 earthquake that struck 8 km SSE of Olancha, CA on April 20, 2026 at 00:53 UTC had a depth of 2.5 km. For context, this was a minor earthquake typically detected only by instruments.

Were there aftershocks?

Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 3.0 earthquakes can continue for several days and gradually diminish over time.

What should I do after an earthquake?

If you were in the affected area: check yourself and others for injuries, inspect your home for damage, and be prepared for aftershocks. For detailed guidance, see our earthquake safety guide and emergency planning resources.