OFFSHORE NORTHERN CALIFORNIA
23 October 2026, 08:38:15 (+03) 2026-10-23 05:38:15 UTC
- Magnitude
- 3.1 ml
- Depth
- 10.0 km
- Coordinates
- 40.5188, -125.3264
- Data consistency
- 75/100
Regional activity (100 km)
- Last 24 hours
- 0
- Last 7 days
- 1
- Last 30 days
- 15
Approximate energy released
≈ 0.7 t TNT
2.82e+9 J
Approximated with the Gutenberg–Richter relation (log E = 1.5 M + 4.8); depends on magnitude type. Gutenberg & Richter (1956).
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Community reports
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- Community intensity
- Typical duration
- Farthest report
- felt it
Estimated, close to the MMI scale
Intensity distribution
Provinces with reports
Reported effects
Squares on the map show community reports (~11 km grid; colour = estimated intensity).
Based on voluntary reports from users; not an instrumental measurement or official intensity. For official information follow AFAD and Kandilli Observatory announcements.
Impact information reported by sources
- USGS Earthquake Hazards Program Tsunami flag: No
These values are automatic products of the respective agency, not an assessment by this platform. For tsunami warnings follow the Kandilli Observatory Regional Earthquake-Tsunami Monitoring Center and AFAD.
Nearby places
No records.
Nearby faults (50 km)
No mapped fault within 50 km.
Last year, within 100 km
16 earthquakes
By magnitude
- M0 0
- M1 0
- M2 7
- M3 8
- M4 0
- M5 1
- M6 0
- M7 0
- M8+ 0
By depth
- 0–10 km 6
- 10–20 km 9
- 20–40 km 1
- 40–70 km 0
- 70–150 km 0
- 150+ km 0
Largest previous earthquakes within 100 km
Largest earthquakes in the platform catalogue and entries from historical catalogues (with citation).
- M3,4 OFFSHORE NORTHERN CALIFORNIA 12.10.2026 · 65 km
- M3,2 OFFSHORE NORTHERN CALIFORNIA 15.10.2026 · 19 km
- M3,2 OFFSHORE NORTHERN CALIFORNIA 12.10.2026 · 39 km
- M3,0 OFFSHORE NORTHERN CALIFORNIA 22.10.2026 · 93 km
- M3,0 OFFSHORE NORTHERN CALIFORNIA 20.10.2026 · 39 km
- M3,0 13 km W of Petrolia, CA 15.10.2026 · 78 km
- M3,0 21 km WSW of Petrolia, CA 21.09.2026 · 73 km
- M2,6 18 km WSW of Petrolia, CA 18.10.2026 · 76 km
Comparison with past records
…
No earlier earthquakes are recorded in this area.
- Source:
Where does this earthquake come from?
Source comparison
| Agency | Magnitude | Depth | Time (UTC) | Difference from master | Original record |
|---|---|---|---|---|---|
|
EMSC-CSEM
Displayed
OFFSHORE NORTHERN CALIFORNIA
|
3.1 ml | 10.0 km | 05:38:15.292 | Δt 0 sn · 0 km · ΔM 0 | Original record |
|
USGS Earthquake Hazards Program
70 km W of Ferndale, CA
|
3.4 ml | 10.4 km | 05:38:19.230 | Δt 3.94 sn · 22.56 km · ΔM +0.3 | Original record |
This value summarises agreement between sources; it is not a measure of scientific accuracy. Euro-Mediterranean Seismological Centre (EMSC-CSEM) — CC BY 4.0 U.S. Geological Survey (USGS) Earthquake Hazards Program — Public domain (U.S. Government)
Revision history
-
23.10.2026 08:54:04 · EMSC · update
depth: 10.4 → 10 latitude: 40.6178 → 40.5188 longitude: -125.0938 → -125.3264 magnitude: 3.4 → 3.1 time: 2026-10-23T05:38:19.230+00:00 → 2026-10-23T05:38:15.292+00:00
-
23.10.2026 08:54:04 · SISTEM · recompute
depth: 10.4 → 10 latitude: 40.6178 → 40.5188 longitude: -125.0938 → -125.3264 magnitude: 3.4 → 3.1 time: 2026-10-23T05:38:19.230Z → 2026-10-23 05:38:15.292+00:00
-
23.10.2026 08:40:36 · SISTEM · recompute
source count: 1 → 2 confirming sources: emsc → emsc,usgs
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