Earthquake · Reviewed by USGS

M4.2 earthquake 199 km SSE of Shimoda, Japan

A magnitude 4.2 earthquake struck 199 km SSE of Shimoda, Japan at Dec 16, 2025, 21:09 UTC, at a depth of 193 km. The epicentre was 199 km (124 mi) SSE of Shimoda.

Details

Magnitude	4.2 mb
Time	Dec 16, 2025, 21:09 UTC
Depth	192.7 km
Coordinates	32.977, 139.634
Felt reports	0
Tsunami flag	None
Source	USGS event page

Fig. 1The epicentre and other earthquakes within 100 km, since the day before

01 — Nearby

Nearest cities

02 — Around it

Other earthquakes within 100 km

Other earthquakes within 100 km since the day before this event
Magnitude	Location	Distance	Depth	Time
4.2	115 km SSE of Shimoda, Japan	85 km / 53 mi	depth 10 km	Sep 12, 19:18 UTC
4.3	234 km SSE of Shimoda, Japan	46 km / 29 mi	depth 119 km	Aug 14, 16:54 UTC
4.4	241 km S of Tateyama, Japan	71 km / 44 mi	depth 110 km	Aug 4, 04:46 UTC
4.3	184 km S of Tateyama, Japan	71 km / 44 mi	depth 80 km	Jul 24, 23:18 UTC
4.2	238 km SSE of Shimoda, Japan	48 km / 30 mi	depth 128 km	Apr 17, 13:51 UTC
4.0	231 km SSE of Shimoda, Japan	39 km / 24 mi	depth 167 km	Mar 27, 02:27 UTC
4.5	253 km SSE of Shimoda, Japan	70 km / 43 mi	depth 95 km	Feb 17, 13:00 UTC
4.4	261 km SSE of Tateyama, Japan	93 km / 58 mi	depth 67 km	Feb 2, 08:31 UTC
4.7	270 km SSE of Shimoda, Japan	73 km / 46 mi	depth 145 km	Dec 19, 12:54 UTC

USGS can revise magnitude and location after the first report. See magnitude vs intensity and aftershocks.