23 Mar 2026, 12:39 UTC · Mar 23, 8:39 AM ET

M4.6 earthquake 93 km S of Koshima, Japan

A magnitude 4.6 earthquake struck 93 km S of Koshima, Japan at Mar 23, 8:39 AM ET, 38 km deep, light – felt by most people nearby, rattling windows, rarely damage.

under 33–44–55–66+

Magnitude	4.6 mb
Time	23 Mar 2026, 12:39 UTC
Location	29.395°, 130.654° – 93 km S of Koshima, Japan
Depth	37.5 km
Felt reports	0
USGS event	us6000sivm

Within 100 km

Other earthquakes nearby this year

Mag.	Where	When (ET)	Depth	Felt
5.5	103 km NE of Tatsugō, Japan · PAGER green	Feb 4, 1:20 PM 254 d ago	29 km	–
5.4	84 km S of Koshima, Japan · PAGER green	Mar 21, 7:12 AM 209 d ago	22 km	1 report
5.1	99 km S of Yudomari, Japan	Sep 12, 4:32 PM 34 d ago	35 km	1 report
5.1	113 km S of Koshima, Japan	Feb 17, 9:27 PM 241 d ago	32 km	1 report
4.9	97 km SE of Koshima, Japan	Aug 22, 10:56 AM 55 d ago	10 km	–
4.8	112 km S of Koshima, Japan	Oct 3, 2:05 AM 14 d ago	37 km	–
4.8	55 km ESE of Koshima, Japan	Aug 29, 5:00 PM 48 d ago	35 km	–
4.8	62 km ESE of Koseda, Japan	Aug 4, 3:56 PM 73 d ago	28 km	1 report
4.8	139 km SSE of Koshima, Japan	Nov 28, 5:40 PM 322 d ago	10 km	–
4.6	161 km SSE of Koshima, Japan	Jun 30, 8:39 AM 108 d ago	10 km	–
4.6	118 km ESE of Koshima, Japan	Apr 6, 9:14 AM 193 d ago	10 km	–
4.6	52 km SE of Koseda, Japan	Apr 4, 12:14 PM 195 d ago	42 km	–

FAQ

About this earthquake

How strong was the 93 km S of Koshima, Japan earthquake?

Magnitude 4.6 (mb), light – felt by most people nearby, rattling windows, rarely damage. Depth 38 km.

Was it felt?

No felt reports have been submitted to the USGS so far.

Were there aftershocks?

1 earthquakes within 100 km in the following two weeks are in our records, the strongest M4.6.

Earthquakes

Source: U.S. Geological Survey (USGS) earthquake catalog, real-time feeds and FDSN event service; magnitudes and locations are revised by seismologists for hours after an event. Times are Eastern (ET) unless marked UTC. Not an alert service: for warnings follow local authorities and tsunami centers.