M3.9 earthquake 163 km NE of Tual, Indonesia
A magnitude 3.9 earthquake struck 163 km NE of Tual, Indonesia on Wed, Sep 23, 1987, 3:40 PM GMT+9 (06:40 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M5.1 196 km NE of Tual, Indonesia. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.9 (mb), minor
- Local time
- UTC
- 1987-09-23 06:40:45 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 4.715° S, 133.907° E
- Region
- Indonesia
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
No one has reported feeling this quake to the USGS.
How well it is located
Reviewed by a seismologist.
- Depth from
- OPERATOR_ASSIGNED
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 5 in the 60 days after this one and 0 in the 30 days before it.
After
- 5.1196 km NE of Tual, Indonesia · 14240 days ago · 33 km deep · 34 km away
- 3.9157 km ENE of Tual, Indonesia · 14240 days ago · 33 km deep · 18 km away
- 4.2113 km NE of Tual, Indonesia · 14216 days ago · 33 km deep · 50 km away
- 4.2188 km ENE of Tual, Indonesia · 14197 days ago · 33 km deep · 39 km away
- 4.9156 km ENE of Tual, Indonesia · 14193 days ago · 33 km deep · 21 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00038mt. Read Tue, Sep 22, 2026, 8:42 AM UTC.