Earthquakes 3 km ESE of San Ramon, CA — 144 people reported feeling this earthquake — CDI 3.4 (Weak)
Right now
One other detection within 20 km in the last 24 hours, 18 km from here.
Reported by USGS 173 days ago.
It is the 5th strongest of the 13 detections recorded within 20 km of this point since 8 March 2026. The last comparable one was on 13 March 2026. One more was recorded here in the fortnight before it.
What the source measured
USGS reported: 3 km ESE of San Ramon, CA — 144 people reported feeling this earthquake — CDI 3.4 (Weak)
USGS recorded magnitude 2.8 at a depth of 9 km.
Nearby, since 8 March 2026
- March 8, 2026 · score 5 · 1.5 km
- March 8, 2026 · score 5 · 1.5 km
- March 13, 2026 · score 0 · 1.5 km
How we know
One source: USGS. Not yet confirmed by a second, independent source.
Our own score for this event is 0 out of 100, at 50 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Earthquakes |
| Severity | Low |
| Calamity Score (ours) | 0 / 100 |
| Our confidence | 50% |
| Coordinates | 37.7635, -121.9457 |
| Timestamp | 2026-03-24T07:31:47.030Z |
| Source | https://earthquake.usgs.gov/earthquakes/eventpage/nc75332242/dyfi |
Score Breakdown
Technical Details
| Mag | 2.81 |
| Depth | 8.51 |
| Felt | 144 |
| Cdi | 3.4 |
| CdiDescription | Weak |
| Sig | 170 |
| Tsunami | false |
| Place | 3 km ESE of San Ramon, CA |
| Types | ,dyfi,focal-mechanism,nearby-cities,origin,phase-data,scitech-link, |
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 8 March 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.
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