M5.5 earthquake 21 km ENE of Biga, Turkey
A magnitude 5.5 earthquake struck 21 km ENE of Biga, Turkey on Sun, Aug 21, 1966, 3:30 AM GMT+2 (01:30 UTC), 20 km (12 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.5 (mw), moderate
- Local time
- UTC
- 1966-08-21 01:30:46 UTC
- Depth
- 19.9 km (12.4 mi), shallow
- Epicenter
- 40.328° N, 27.456° E
- Region
- Turkey
- 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.
- Magnitude uncertainty
- ±0.20
- Depth from
- From location
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.5 and up: 0 in the 60 days after this one and 0 in the 30 days before it.
None recorded.
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event iscgem844762. Read Wed, Sep 23, 2026, 6:12 AM UTC.