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Significant earthquake

This summarises a recorded earthquake only; it is not a warning or a prediction. Follow AFAD and the competent authorities for official statements and guidance.

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3.0

NORTHERN CALIFORNIA

21 October 2026, 18:55:24 (+03) 2026-10-21 15:55:24 UTC

2 sources: EMSC, USGS ml
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Magnitude
3.0 ml
Depth
7.3 km
Coordinates
40.8915, -120.6155
Data consistency
85/100

Regional activity (100 km)

Last 24 hours
0
Last 7 days
1
Last 30 days
4

Approximate energy released

≈ 0.5 t TNT

2.00e+9 J

Approximated with the Gutenberg–Richter relation (log E = 1.5 M + 4.8); depends on magnitude type. Gutenberg & Richter (1956).

Did you feel this earthquake?

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Community reports

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

5 earthquakes

By magnitude

  • M0 0
  • M1 0
  • M2 4
  • M3 1
  • M4 0
  • M5 0
  • M6 0
  • M7 0
  • M8+ 0

By depth

  • 0–10 km 4
  • 10–20 km 1
  • 20–40 km 0
  • 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).

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
NORTHERN CALIFORNIA
 3.0 ml 7.3 km 15:55:24.083 Δt 0 sn · 0 km · ΔM 0 Original record
USGS Earthquake Hazards Program
39 km SSW of Likely, CA
 3.1 ml 6.2 km 15:55:24.610 Δt 0.53 sn · 1.19 km · ΔM +0.1 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

  1. 21.10.2026 20:08:07 · EMSC · update

    depth: 6.2 → 7.3 latitude: 40.8835 → 40.8915 longitude: -120.6062 → -120.6155 time: 2026-10-21T15:55:24.610+00:00 → 2026-10-21T15:55:24.083+00:00

  2. 21.10.2026 20:08:07 · SISTEM · recompute

    depth: 6.2 → 7.3 latitude: 40.8835 → 40.8915 longitude: -120.6062 → -120.6155 time: 2026-10-21T15:55:24.610Z → 2026-10-21 15:55:24.083+00:00

  3. 21.10.2026 19:41:06 · EMSC · update

    magnitude: 2.8 → 3

  4. 21.10.2026 19:41:06 · SISTEM · recompute

    magnitude: 2.8 → 3

  5. 21.10.2026 18:59:19 · EMSC · update

    magnitude: 3.1 → 2.8

  6. 21.10.2026 18:59:19 · SISTEM · recompute

    magnitude: 3.1 → 2.8

  7. 21.10.2026 18:58:20 · SISTEM · recompute

    source count: 1 → 2 confirming sources: emsc → emsc,usgs

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