Reported by USGS 114 days ago.
No stronger detection stands among the 10 recorded within 20 km of this point since 4 April 2026 — 9 others scored the same. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
USGS reported: 1 km SE of Muscoy, CA
USGS recorded magnitude 3.4 at a depth of 13 km.
Nearby, since 4 April 2026
- April 16, 2026 · score 0 · 6.9 km
- June 9, 2026 · score 0 · 19.6 km
- May 8, 2026 · score 0 · 19.7 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 61 % 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) | 0 / 100 |
| Our confidence | 61% |
| Coordinates | 34.1473, -117.3340 |
| Timestamp | 2026-05-09T06:32:27.990Z |
| Source | https://earthquake.usgs.gov/earthquakes/eventpage/ci41459312 |
Score Breakdown
Technical Details
| Mag | 3.39 |
| Depth | 13.28 |
| Tsunami | false |
| Felt | 584 |
| Mmi | 3.41 |
| Sig | 387 |
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 0/100, 1 km SE of Muscoy, CA (United States), based on data from usgs. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.