Right now
Nothing else has been detected within 20 km in the last 24 hours.
Reported by NCEDC 88 days ago.
No stronger detection stands among the 15 recorded within 20 km of this point since 18 June 2026 — one other scored the same. The last comparable one was on 18 June 2026. One more was recorded here in the fortnight before it.
What the source measured
NCEDC reported: Redwood Valley, CA
NCEDC recorded magnitude 5.5 at a depth of 9 km.
The seismic region given by the source is Redwood Valley, CA.
Urban PEI: 238 within a heuristic 20 km radius; not unique people.
Nearby, since 18 June 2026
- June 24, 2026 · score 17 · 0.0 km
- June 26, 2026 · score 0 · 0.4 km
- June 25, 2026 · score 0 · 0.8 km
How we know
One source: NCEDC. Not yet confirmed by a second, independent source.
Our own score for this event is 17 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
Computed under scoring rules v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Earthquakes |
| Severity | Medium |
| Calamity Score (ours) | 17 / 100 |
| Legacy data-support index | 0.78/1 |
| Coordinates | 39.3623, -123.2288 |
| Nearest City | Ukiah (24 km) |
| Urban exposure index (PEI) | 238 within 20 km |
| Impact Tier | minor |
| Timestamp | 2026-06-24T13:10:40.760Z |
| Source | https://ncedc.org/cgi-bin/catalog-search2.pl?REQID=75382936 |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: ncedc. Occurrence: 2026-06-24T13:10:40.760Z.
First archived: 2026-06-25T01:05:34.556Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Mag | 5.5 |
| Depth | 8.85 |
| MagType | Mw |
| Region | Redwood Valley, CA |
Cascade Risks
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.
Review the area, threshold and delivery channel in your account.
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