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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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4.7

33 km NE of Shizunai-furukawachō, Japan

21 October 2026, 17:40:50 (+03) 2026-10-21 14:40:50 UTC

2 sources: EMSC, USGS mb
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Magnitude
4.7 mb
Depth
94.1 km
Coordinates
42.5730, 142.6247
Data consistency
90/100

Regional activity (100 km)

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

Approximate energy released

≈ 169 t TNT

7.08e+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?

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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

3 earthquakes

By magnitude

  • M0 0
  • M1 0
  • M2 0
  • M3 2
  • 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 1
  • 70–150 km 2
  • 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
HOKKAIDO, JAPAN REGION
 4.7 mb 100.0 km 14:40:51.020 Δt 0.27 sn · 3.69 km · ΔM 0 Original record
USGS Earthquake Hazards Program Displayed
33 km NE of Shizunai-furukawachō, Japan
 4.7 mb 94.1 km 14:40:50.748 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. 22.10.2026 09:27:48 · EMSC · update

    latitude: 42.54 → 42.5676 longitude: 142.85 → 142.6691 magnitude: 4.6 → 4.7 time: 2026-10-21T14:40:50.600+00:00 → 2026-10-21T14:40:51.020+00:00

  2. 21.10.2026 19:47:29 · SISTEM · recompute

    depth: 100 → 94.11 latitude: 42.54 → 42.573 longitude: 142.85 → 142.6247 magnitude: 4.6 → 4.7 time: 2026-10-21T14:40:50.600Z → 2026-10-21 14:40:50.748+00:00 source count: 1 → 2 review status: automatic → reviewed confirming sources: emsc → emsc,usgs preferred source: 3 → 4

  3. 21.10.2026 18:26:46 · EMSC · update

    latitude: 42.6 → 42.54 longitude: 142.7 → 142.85 magnitude: 4.2 → 4.6 time: 2026-10-21T14:41:30.000+00:00 → 2026-10-21T14:40:50.600+00:00 magnitude type: m → mb

  4. 21.10.2026 18:26:46 · SISTEM · recompute

    latitude: 42.6 → 42.54 longitude: 142.7 → 142.85 magnitude: 4.2 → 4.6 time: 2026-10-21T14:41:30.000Z → 2026-10-21 14:40:50.600+00:00 magnitude type: m → mb

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