Earthquake · Reviewed by USGS

M4.2 earthquake 246 km SE of Shinmachi, Japan

A magnitude 4.2 earthquake struck 246 km SE of Shinmachi, Japan at Apr 30, 2026, 02:18 UTC, at a depth of 10 km. The epicentre was 246 km (153 mi) SE of Isumi.

Details

Magnitude	4.2 mb
Time	Apr 30, 2026, 02:18 UTC
Depth	10.0 km
Coordinates	33.816, 142.471
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
4.7	202 km SSE of Katsuura, Japan	99 km / 62 mi	depth 41 km	Aug 14, 09:58 UTC
4.4	off the east coast of Honshu, Japan	86 km / 53 mi	depth 10 km	Jun 1, 02:28 UTC
4.5	off the east coast of Honshu, Japan	83 km / 52 mi	depth 10 km	May 29, 10:15 UTC
4.3	221 km SE of Katsuura, Japan	32 km / 20 mi	depth 10 km	May 23, 03:34 UTC
4.4	203 km SE of Katsuura, Japan	64 km / 40 mi	depth 10 km	May 1, 07:23 UTC

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