Skip to content
You are offline: the data shown may be out of date.

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.

Back to map
4.5

43 km E of Onagawa Chō, Japan

8 November 2026, 23:16:30 (+03) 2026-11-08 20:16:30 UTC

2 sources: EMSC, USGS mwr
Did you feel this earthquake?
Magnitude
4.5 mwr
Depth
55.7 km
Coordinates
38.3782, 141.9370
Data consistency
88/100

Regional activity (100 km)

Last 24 hours
0
Last 7 days
5
Last 30 days
9

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).

Did you feel this earthquake?

Your report adds to a community map of where and how this earthquake was felt. It takes less than a minute.

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

11 earthquakes

By magnitude

  • M0 0
  • M1 0
  • M2 0
  • M3 3
  • M4 7
  • M5 1
  • M6 0
  • M7 0
  • M8+ 0

By depth

  • 0–10 km 0
  • 10–20 km 1
  • 20–40 km 1
  • 40–70 km 8
  • 70–150 km 1
  • 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
NEAR EAST COAST OF HONSHU, JAPAN
 4.5 mw 35.0 km 20:16:28.020 Δt 2.33 sn · 9.54 km · ΔM 0 Original record
USGS Earthquake Hazards Program Displayed
43 km E of Onagawa Chō, Japan
 4.5 mwr 55.7 km 20:16:30.347 Δt 0 sn · 0 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)

Revision history

  1. 09.11.2026 01:13:44 · EMSC · update

    depth: 55.7 → 35 latitude: 38.3782 → 38.2965 longitude: 141.937 → 141.9708 time: 2026-11-08T20:16:30.347+00:00 → 2026-11-08T20:16:28.020+00:00

  2. 08.11.2026 23:36:51 · USGS · update

    depth: 58.08 → 55.7 latitude: 38.3824 → 38.3782 longitude: 141.8815 → 141.937 magnitude: 4.8 → 4.5 time: 2026-11-08T20:16:30.710+00:00 → 2026-11-08T20:16:30.347+00:00 location: 38 km E of Onagawa Chō, Japan → 43 km E of Onagawa Chō, Japan magnitude type: mb → mwr

  3. 08.11.2026 23:36:51 · SISTEM · recompute

    depth: 58.08 → 55.7 latitude: 38.3824 → 38.3782 longitude: 141.8815 → 141.937 magnitude: 4.8 → 4.5 time: 2026-11-08T20:16:30.710Z → 2026-11-08 20:16:30.347+00:00 magnitude type: mb → mwr

  4. 08.11.2026 23:36:50 · EMSC · update

    depth: 58.1 → 55.7 latitude: 38.3824 → 38.3782 longitude: 141.8815 → 141.937 magnitude: 4.8 → 4.5 time: 2026-11-08T20:16:30.710+00:00 → 2026-11-08T20:16:30.347+00:00 magnitude type: mb → mw

  5. 08.11.2026 23:34:52 · SISTEM · recompute

    depth: 58.1 → 58.08 source count: 1 → 2 review status: automatic → reviewed confirming sources: emsc → emsc,usgs preferred source: 3 → 4

This platform is provided for information and data visualisation purposes. Follow the announcements of the competent authorities for official emergency warnings.