⚠️ This earthquake carries a tsunami threat. Follow official guidance from your national agency.
LIGHT EARTHQUAKE
85 km W of Petrolia, CA
A magnitude 4.7 earthquake struck 85 km W of Petrolia, CA on 29 Aug 2026, 02:41 UTC. The hypocentre was 10 km below the surface — shallow by seismological convention. The reporting agency flagged a tsunami threat for this event; follow official warnings rather than this page. 1 other earthquake above our reporting threshold has been recorded within 250 km in the past 30 days.
- Depth
- 10 km
- Latitude
- 40.45°N
- Time
- 02:41 UTC
- Magnitude
- M4.7
shallow
125.27°W longitude
29 Aug 2026
mw
EPICENTRE
MAGNITUDE 4.7
Noticeable shaking of indoor objects. Damage is unlikely.
The scale is logarithmic: this released about 350 times the energy of a magnitude 3.0, roughly the energy of 169 tonnes of TNT.
10 KM DEEP
Shallow earthquakes release their energy close to the surface, so they are felt more strongly, and do more damage, than deeper earthquakes of the same magnitude.
NEARBY IN THE PAST 30 DAYS
1 earthquake above our reporting threshold within 250 km of this one, the largest a magnitude 4.4.
OTHER RECENT EARTHQUAKES
18 Sept 2026, 02:12 UTC · 36.3 km deep
18 Sept 2026, 01:29 UTC · 106 km deep
18 Sept 2026, 01:07 UTC · 53.9 km deep
17 Sept 2026, 22:11 UTC · 82.7 km deep