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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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4.8

6 km S of Asahi, Japan

3 November 2026, 08:40:18 (+03) 2026-11-03 05:40:18 UTC

3 sources: EMSC, USGS, GFZ mwr
Did you feel this earthquake?
Magnitude
4.8 mwr
Depth
52.3 km
Coordinates
35.6591, 140.6480
Data consistency
96/100

Regional activity (100 km)

Last 24 hours
0
Last 7 days
2
Last 30 days
13

Approximate energy released

≈ 239 t TNT

1.00e+12 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

15 earthquakes

By magnitude

  • M0 0
  • M1 0
  • M2 0
  • M3 6
  • M4 6
  • M5 3
  • M6 0
  • M7 0
  • M8+ 0

By depth

  • 0–10 km 0
  • 10–20 km 0
  • 20–40 km 3
  • 40–70 km 9
  • 70–150 km 3
  • 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

Sources report different values.
Agency Magnitude Depth Time (UTC) Difference from master Original record
EMSC-CSEM
NEAR EAST COAST OF HONSHU, JAPAN
 5.0 mb 46.0 km 05:40:18.080 Δt 0.02 sn · 11.3 km · ΔM +0.2 Original record
USGS Earthquake Hazards Program Displayed
6 km S of Asahi, Japan
 4.8 mwr 52.3 km 05:40:18.064 Δt 0 sn · 0 km · ΔM 0 Original record
GFZ GEOFON
Near East Coast of Honshu, Japan
 4.8 Mw 62.1 km 05:40:19.890 Δt 1.83 sn · 11.2 km · ΔM 0 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) GEOFON Program, GFZ Helmholtz Centre for Geosciences — CC BY 4.0

Revision history

  1. 03.11.2026 17:10:01 · EMSC · update

    depth: 60 → 46 latitude: 35.6376 → 35.6463 longitude: 140.5556 → 140.5242 time: 2026-11-03T05:40:19.550+00:00 → 2026-11-03T05:40:18.080+00:00

  2. 03.11.2026 12:42:42 · SISTEM · recompute

    depth: 60 → 52.27 latitude: 35.6376 → 35.6591 longitude: 140.5556 → 140.648 magnitude: 5 → 4.8 time: 2026-11-03T05:40:19.550Z → 2026-11-03 05:40:18.064+00:00 source count: 2 → 3 review status: automatic → reviewed magnitude type: mb → mwr confirming sources: emsc,gfz → emsc,usgs,gfz preferred source: 3 → 4

  3. 03.11.2026 10:50:35 · EMSC · update

    latitude: 35.6 → 35.6376 longitude: 140.81 → 140.5556 time: 2026-11-03T05:40:17.000+00:00 → 2026-11-03T05:40:19.550+00:00

  4. 03.11.2026 10:50:35 · SISTEM · recompute

    latitude: 35.6 → 35.6376 longitude: 140.81 → 140.5556 time: 2026-11-03T05:40:17.000Z → 2026-11-03 05:40:19.550+00:00

  5. 03.11.2026 09:37:30 · GFZ · update

    depth: 61.9 → 62.1 magnitude: 5.1 → 4.8 time: 2026-11-03T05:40:19.860+00:00 → 2026-11-03T05:40:19.890+00:00 magnitude type: mb → Mw

  6. 03.11.2026 09:33:06 · EMSC · update

    depth: 46 → 60 latitude: 35.6336 → 35.6 longitude: 140.5133 → 140.81 time: 2026-11-03T05:40:18.220+00:00 → 2026-11-03T05:40:17.000+00:00

  7. 03.11.2026 09:33:06 · SISTEM · recompute

    depth: 46 → 60 latitude: 35.6336 → 35.6 longitude: 140.5133 → 140.81 time: 2026-11-03T05:40:18.220Z → 2026-11-03 05:40:17.000+00:00

  8. 03.11.2026 09:12:32 · EMSC · update

    depth: 61.9 → 46 latitude: 35.61 → 35.6336 longitude: 140.54 → 140.5133 time: 2026-11-03T05:40:19.860+00:00 → 2026-11-03T05:40:18.220+00:00

  9. 03.11.2026 09:12:32 · SISTEM · recompute

    depth: 61.9 → 46 latitude: 35.61 → 35.6336 longitude: 140.54 → 140.5133 time: 2026-11-03T05:40:19.860Z → 2026-11-03 05:40:18.220+00:00

  10. 03.11.2026 08:58:06 · GFZ · update

    depth: 65.9 → 61.9 latitude: 35.635 → 35.61 longitude: 140.693 → 140.54 time: 2026-11-03T05:40:19.130+00:00 → 2026-11-03T05:40:19.860+00:00

  11. 03.11.2026 08:57:18 · EMSC · update

    depth: 46 → 61.9 latitude: 35.6231 → 35.61 longitude: 140.5625 → 140.54 time: 2026-11-03T05:40:18.020+00:00 → 2026-11-03T05:40:19.860+00:00

  12. 03.11.2026 08:57:18 · SISTEM · recompute

    depth: 46 → 61.9 latitude: 35.6231 → 35.61 longitude: 140.5625 → 140.54 time: 2026-11-03T05:40:18.020Z → 2026-11-03 05:40:19.860+00:00

  13. 03.11.2026 08:51:58 · SISTEM · recompute

    depth: 65.9 → 46 latitude: 35.635 → 35.6231 longitude: 140.693 → 140.5625 magnitude: 5.1 → 5 time: 2026-11-03T05:40:19.130Z → 2026-11-03 05:40:18.020+00:00 source count: 1 → 2 confirming sources: gfz → emsc,gfz preferred source: 5 → 3

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