M4.1 earthquake 176 km S of Tomohon, Indonesia
A magnitude 4.1 earthquake struck 176 km S of Tomohon, Indonesia on Fri, Aug 21, 1981, 4:11 AM GMT+8 (20:11 UTC), 155 km (96 mi) below the surface.
A larger quake followed: M4.5 94 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
- 4.1 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1981-08-20 20:11:11 UTC
- Depth
- 154.5 km (96.0 mi), intermediate-depth
- Epicenter
- 0.278° S, 124.675° 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 1.5 and up: 1 in the 60 days after this one and 0 in the 30 days before it.
After
Earthquakes todayIndonesia earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0001fd0. Read Thu, Oct 1, 2026, 1:00 PM UTC.