Reported by ISC today.
The last comparable one was on 24 July 2026.
What the source measured
ISC reported: Off coast of northern California
ISC recorded magnitude 4.6 at a depth of 10 km.
The seismic region given by the source is Off coast of northern California.
Nearby, since 24 July 2026
- July 24, 2026 · score 0 · 15.4 km
How we know
One source: ISC. Not yet confirmed by a second, independent source.
Our own score for this event is 5 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) | 5 / 100 |
| Our confidence | 58% |
| Coordinates | 40.5500, -126.6600 |
| Nearest City | Eureka (213 km) |
| Impact Tier | minor |
| Timestamp | 2026-08-31T06:36:47.500Z |
| Source | http://www.isc.ac.uk/cgi-bin/web-db-run?event_id=646263915&out_format=IMS1.0&request=COMPREHENSIVE |
Score Breakdown
Technical Details
| Mag | 4.6 |
| Depth | 10 |
| MagType | MB |
| Region | Off coast of northern California |
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 5/100, in Off Coast of Northern California (United States), based on data from isc. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.