LIGHT EARTHQUAKE
100 km W of Petrolia, CA
A magnitude 4.7 earthquake struck 100 km W of Petrolia, CA on 29 Sept 2026, 11:36 UTC. The hypocentre was 2.3 km below the surface — shallow by seismological convention. The figures have been revised 17 times since the first report. 1 other earthquake above our reporting threshold has been recorded within 250 km in the past 30 days.
- Depth
- 2.3 km
- Latitude
- 40.43°N
- Time
- 11:36 UTC
- Magnitude
- M4.7
shallow
125.46°W longitude
29 Sept 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.
2.3 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 4.5.
OTHER RECENT EARTHQUAKES
19 Oct 2026, 08:51 UTC · 124.8 km deep
19 Oct 2026, 08:21 UTC · 10 km deep
19 Oct 2026, 08:12 UTC · 10 km deep
19 Oct 2026, 07:55 UTC · 10 km deep