M6.6 earthquake in Japan on December 8, 2025

A magnitude 6.6 earthquake struck on December 8, 2025 at 21:52 UTC. According to USGS the epicenter was 129 km south of Honchō, at a depth of 19 km. It was a shallow quake, and shallow quakes are usually felt most strongly at the surface.

6.6magnitude

19 kmdepth

21:52time UTC

greenUSGS alert

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Key facts

4 people reported feeling it to USGS. The USGS PAGER system issued a green alert, expecting little impact.

Nearest cities

Obihiro (Japan)216 km
Tomakomai (Japan)225 km
Hirosaki (Japan)229 km
Kushiro (Japan)244 km
Ōshū (Japan)265 km

Did you feel an earthquake?

Report it to seismologists. These reports help work out quickly where the shaking was strongest. It takes a minute.

Report to USGS (Did You Feel It?)Report to EMSC (LastQuake)

Aftershocks

Since then USGS has recorded 147 quakes of magnitude 4.5 or more within 150 km, the strongest M7.4.

M7.4 · Apr 20, 07:52 UTC112 km
M6.9 · Jun 24, 22:30 UTC115 km
M6.7 · Dec 12, 02:44 UTC30 km
M6.0 · Aug 23, 13:44 UTC101 km
M6.0 · Jul 1, 12:08 UTC104 km
M6.0 · Apr 20, 07:56 UTC134 km
M6.0 · Dec 31, 14:26 UTC97 km
M5.8 · Jun 27, 20:21 UTC101 km

Regional history

Since 1976 there have been 140 earthquakes of magnitude 6 or more within 300 km. The strongest was M8.2 (September 25, 2003).

M8.2 · September 25, 2003113 km
M7.8 · December 28, 199455 km
M7.6 · December 8, 202581 km
M7.6 · January 15, 1993262 km
M7.4 · September 25, 200396 km