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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.

5 km ESE of Asahi, Japan earthquake sequence

Active Gardner–Knopoff windows · 28.10.2026 18:07 – ongoing

Earthquakes
7
Largest
M5,5
Mainshock
M5,5 · 5 km ESE of Asahi, Japan · 28.10.2026 18:07

Earthquakes of the sequence (oldest to newest)

Earthquakes per day

Earthquakes in the sequence

MagnitudeLocationTime (Europe/Istanbul)Depth
5.5 5 km ESE of Asahi, Japan 28.10.2026 18:07 41,4 km
5.4 Near East Coast of Honshu, Japan 28.10.2026 18:07 50,2 km
4.7 6 km N of Asahi, Japan 28.10.2026 21:32 41,5 km
4.3 10 km SSE of Hasaki, Japan 28.10.2026 23:22 26,0 km
3.5 NEAR EAST COAST OF HONSHU, JAPAN 28.10.2026 23:22 26,0 km
4.8 6 km S of Asahi, Japan 03.11.2026 08:40 52,3 km
3.4 NEAR EAST COAST OF HONSHU, JAPAN 03.11.2026 23:34 60,0 km

Sequences group earthquakes that have occurred by proximity in time and location (Gardner–Knopoff windows, Poisson rate test). Follow AFAD and Kandilli Observatory for official assessments. (Gardner & Knopoff (1974))