M3.6 earthquake 21 km ESE of Astypálaia, Greece
A magnitude 3.6 earthquake struck 21 km ESE of Astypálaia, Greece on Fri, Jun 28, 1991, 5:04 PM GMT+3 (14:04 UTC), 153 km (95 mi) below the surface.
A larger quake followed: M4.7 59 km S of Mandráki, Greece. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.6 (Md, duration), minor
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1991-06-28 14:04:08 UTC
- Depth
- 152.7 km (94.9 mi), intermediate-depth
- Epicenter
- 36.443° N, 26.553° E
- Region
- Greece
- 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 1 in the 30 days before it.
After
Before
Earthquakes todayGreece earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0004th3. Read Sun, Oct 4, 2026, 7:42 AM UTC.