4 Aug 2026, 09:29 UTC · Aug 4, 5:29 AM ET

M4.5 earthquake 103 km S of Koshima, Japan

A magnitude 4.5 earthquake struck 103 km S of Koshima, Japan at Aug 4, 5:29 AM ET, 35 km deep, light – felt by most people nearby, rattling windows, rarely damage.

M4.5 103 km S of Koshima, JapanM4.6 161 km SSE of Koshima, JapanM4.6 52 km SE of Koseda, JapanM4.6 93 km S of Koshima, JapanM4.6 92 km S of Koshima, JapanM4.8 112 km S of Koshima, JapanM4.8 55 km ESE of Koshima, JapanM4.8 139 km SSE of Koshima, JapanM4.9 97 km SE of Koshima, JapanM5.1 99 km S of Yudomari, JapanM5.1 113 km S of Koshima, JapanM5.4 84 km S of Koshima, JapanM5.5 103 km NE of Tatsugō, Japan
under 33–44–55–66+
Magnitude4.5 mb
Time4 Aug 2026, 09:29 UTC
Location29.308°, 130.635° – 103 km S of Koshima, Japan
Depth35.0 km
Felt reports0
USGS eventus6000tj01
Within 100 km

Other earthquakes nearby this year

Mag.WhereWhen (ET)DepthFelt
5.5103 km NE of Tatsugō, Japan · PAGER greenFeb 4, 1:20 PM
254 d ago
29 km–
5.484 km S of Koshima, Japan · PAGER greenMar 21, 7:12 AM
209 d ago
22 km1 report
5.199 km S of Yudomari, JapanSep 12, 4:32 PM
34 d ago
35 km1 report
5.1113 km S of Koshima, JapanFeb 17, 9:27 PM
241 d ago
32 km1 report
4.997 km SE of Koshima, JapanAug 22, 10:56 AM
55 d ago
10 km–
4.8112 km S of Koshima, JapanOct 3, 2:05 AM
14 d ago
37 km–
4.855 km ESE of Koshima, JapanAug 29, 5:00 PM
48 d ago
35 km–
4.8139 km SSE of Koshima, JapanNov 28, 5:40 PM
322 d ago
10 km–
4.6161 km SSE of Koshima, JapanJun 30, 8:39 AM
108 d ago
10 km–
4.652 km SE of Koseda, JapanApr 4, 12:14 PM
195 d ago
42 km–
4.693 km S of Koshima, JapanMar 23, 8:39 AM
207 d ago
38 km–
4.692 km S of Koshima, JapanMar 21, 7:53 AM
209 d ago
40 km–
FAQ

About this earthquake

How strong was the 103 km S of Koshima, Japan earthquake?

Magnitude 4.5 (mb), light – felt by most people nearby, rattling windows, rarely damage. Depth 35 km.

Was it felt?

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

Were there aftershocks?

No earthquakes within 100 km have followed so far in our records.

Earthquakes

More

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.

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M4.5 earthquake 103 km S of Koshima, Japan — 77.today