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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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4.5

288 km SSE of Muroto-misakicho, Japan

2 November 2026, 04:54:55 (+03) 2026-11-02 01:54:55 UTC

3 sources: EMSC, USGS, GFZ mb
Did you feel this earthquake?
Magnitude
4.5 mb
Depth
510.1 km
Coordinates
30.8406, 135.1987
Data consistency
92/100

Regional activity (100 km)

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

Approximate energy released

≈ 85 t TNT

3.55e+11 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

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

1 earthquakes

By magnitude

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

By depth

  • 0–10 km 0
  • 10–20 km 0
  • 20–40 km 0
  • 40–70 km 0
  • 70–150 km 0
  • 150+ km 1

Largest previous earthquakes within 100 km

Largest earthquakes in the platform catalogue and entries from historical catalogues (with citation).

No records.

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
SOUTHEAST OF SHIKOKU, JAPAN
 4.8 mb 510.0 km 01:54:54.950 Δt 0.24 sn · 6.87 km · ΔM +0.3 Original record
USGS Earthquake Hazards Program Displayed
288 km SSE of Muroto-misakicho, Japan
 4.5 mb 510.1 km 01:54:55.186 Δt 0 sn · 0 km · ΔM 0 Original record
GFZ GEOFON
Southeast of Shikoku, Japan
 4.9 Mw 504.3 km 01:54:54.610 Δt 0.58 sn · 12.58 km · ΔM +0.4 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. 02.11.2026 10:47:48 · EMSC · update

    depth: 510.1 → 510 latitude: 30.8406 → 30.8167 longitude: 135.1987 → 135.2649 magnitude: 4.5 → 4.8 time: 2026-11-02T01:54:55.186+00:00 → 2026-11-02T01:54:54.950+00:00

  2. 02.11.2026 05:28:51 · GFZ · update

    magnitude: 4.8 → 4.9 magnitude type: mb → Mw

  3. 02.11.2026 05:13:41 · SISTEM · recompute

    depth: 510.1 → 510.07 source count: 2 → 3 review status: automatic → reviewed confirming sources: emsc,gfz → emsc,usgs,gfz preferred source: 3 → 4

  4. 02.11.2026 05:13:41 · SISTEM · recompute

    depth: 504.3 → 510.1 latitude: 30.82 → 30.8406 longitude: 135.328 → 135.1987 magnitude: 4.8 → 4.5 time: 2026-11-02T01:54:54.610Z → 2026-11-02 01:54:55.186+00:00 source count: 1 → 2 confirming sources: gfz → emsc,gfz preferred source: 5 → 3

  5. 02.11.2026 05:08:19 · GFZ · update

    depth: 506.4 → 504.3 latitude: 30.799 → 30.82 longitude: 135.371 → 135.328 time: 2026-11-02T01:54:54.440+00:00 → 2026-11-02T01:54:54.610+00:00

  6. 02.11.2026 05:08:19 · SISTEM · recompute

    depth: 506.4 → 504.3 latitude: 30.799 → 30.82 longitude: 135.371 → 135.328 time: 2026-11-02T01:54:54.440Z → 2026-11-02 01:54:54.610+00:00

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