Live record · USGSReports quakes after they happen. Not an alert system.

Earthquake · Reviewed by USGS

M4.0 earthquake 40 km NE of Ambunti, Papua New Guinea

A magnitude 4.0 earthquake struck 40 km NE of Ambunti, Papua New Guinea at Aug 28, 2025, 08:29 UTC, at a depth of 86 km. The epicentre was 77 km (48 mi) SW of Wewak.

Details

Magnitude4.0 mb
TimeAug 28, 2025, 08:29 UTC
Depth86.3 km
Coordinates-3.968, 143.081
Felt reports0
Tsunami flagNone
SourceUSGS event page
Fig. 1The epicentre and other earthquakes within 100 km, since the day before

02 — Around it

Other earthquakes within 100 km

Other earthquakes within 100 km since the day before this event
MagnitudeLocationDistanceDepthTime
5.433 km ESE of Ambunti, Papua New Guinea44 km / 27 midepth 72 km
4.269 km SW of Angoram, Papua New Guinea95 km / 59 midepth 105 km
4.345 km WSW of Angoram, Papua New Guinea72 km / 45 midepth 126 km
4.216 km NNE of Ambunti, Papua New Guinea27 km / 17 midepth 132 km
4.248 km WSW of Angoram, Papua New Guinea71 km / 44 midepth 134 km
4.339 km E of Ambunti, Papua New Guinea34 km / 21 midepth 97 km
4.016 km ENE of Ambunti, Papua New Guinea24 km / 15 midepth 85 km
4.570 km SE of Ambunti, Papua New Guinea86 km / 54 midepth 90 km
4.139 km ESE of Aitape, Papua New Guinea88 km / 54 midepth 10 km
4.437 km NNW of Wewak, Papua New Guinea98 km / 61 midepth 10 km
4.617 km N of Wewak, Papua New Guinea90 km / 56 midepth 10 km
4.114 km NNE of Wewak, Papua New Guinea90 km / 56 midepth 10 km
4.757 km S of Aitape, Papua New Guinea99 km / 61 midepth 35 km
4.572 km E of Aitape, Papua New Guinea96 km / 59 midepth 10 km
4.542 km NE of Ambunti, Papua New Guinea7 km / 5 midepth 10 km
4.933 km W of Ambunti, Papua New Guinea67 km / 41 midepth 116 km
4.233 km ESE of Aitape, Papua New Guinea94 km / 58 midepth 45 km
4.825 km NNE of Ambunti, Papua New Guinea18 km / 11 midepth 69 km

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