Reported by NCEDC today.
The last comparable one was on 29 August 2026.
What the source measured
NCEDC reported: Petrolia, CA
Nearby, since 1 June 2026
- June 1, 2026 · score 0 · 16.0 km
- August 29, 2026 · score 0 · 24.2 km
How we know
One source: NCEDC. Not yet confirmed by a second, independent source.
Our own score for this event is 2 out of 100, at 58 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Earthquake |
| Severity | low |
| Calamity Score (ours) | 2 / 100 |
| Our confidence | 58% |
| Coordinates | 40.4497, -127.5867 |
| Timestamp | 2026-08-31T06:36:38.650Z |
| Source | https://ncedc.org/cgi-bin/catalog-search2.pl?REQID=75427572 |
Score Breakdown
Technical Details
| Mag | 4.2 |
| Depth | 3.95 |
| MagType | Ml |
| Region | Petrolia, CA |
Safety Information
If you feel shaking: Drop, Cover, and Hold On. Move away from windows, heavy objects, and exterior walls. After shaking stops, check for injuries and structural damage. Be prepared for aftershocks, which can occur minutes to months after the mainshock. Follow instructions from local emergency management authorities.
Series begins 10 February 2026. Comparisons refer to that period only. Collection gap: 14-26 August 2026.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.
Calamity.live data shows a earthquake event with CalamityScore 2/100, in Petrolia, Ca (United States), based on data from ncedc. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.