M4.7 earthquake 172 km SSW of Tomohon, Indonesia
A magnitude 4.7 earthquake struck 172 km SSW of Tomohon, Indonesia on Wed, Dec 16, 1987, 1:31 AM GMT+8 (17:31 UTC), 91 km (57 mi) below the surface.
A larger quake followed: M5.6 161 km S of Tondano, Indonesia. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.7 (mb), light
- Local time
- UTC
- 1987-12-15 17:31:47 UTC
- Depth
- 91.1 km (56.6 mi), intermediate-depth
- Epicenter
- 0.201° S, 124.438° 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
- FROM_LOCATION
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.7 and up: 2 in the 60 days after this one and 4 in the 30 days before it.
After
- 5.6161 km S of Tondano, Indonesia · 14153 days ago · 61 km deep · 50 km away
- 4.3167 km S of Tondano, Indonesia · 14113 days ago · 88 km deep · 54 km away
Before
- 5.6155 km S of Tondano, Indonesia · 14176 days ago · 58 km deep · 63 km away
- 4.9190 km SSE of Tondano, Indonesia · 14177 days ago · 68 km deep · 94 km away
- 6.3181 km S of Tondano, Indonesia · 14178 days ago · 34 km deep · 50 km away
- 6.1171 km S of Tondano, Indonesia · 14179 days ago · 33 km deep · 70 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0003baf. Read Tue, Sep 22, 2026, 9:11 AM UTC.