M4.2 earthquake 20 km SE of Póros, Greece
A magnitude 4.2 earthquake struck 20 km SE of Póros, Greece on Sun, Aug 23, 1981, 12:43 AM GMT+3 (21:43 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M4.3 27 km SW of Lithakiá, Greece. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.2 (mb), light
- Local time
- UTC
- 1981-08-22 21:43:25 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 38.030° N, 20.937° 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
- 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: 12 in the 60 days after this one and 6 in the 30 days before it.
After
- 4.327 km SW of Lithakiá, Greece · 16464 days ago · 33 km deep · 59 km away
- 3.823 km N of Itháki, Greece · 16461 days ago · 33 km deep · 64 km away
- 3.647 km WNW of Lixoúri, Greece · 16454 days ago · 10 km deep · 95 km away
- 4.317 km W of Kyllíni, Greece · 16444 days ago · 50 km deep · 10 km away
- 4.137 km WSW of Lixoúri, Greece · 16440 days ago · 36 km deep · 79 km away
- 4.232 km W of Lixoúri, Greece · 16440 days ago · 35 km deep · 79 km away
- 4.330 km WSW of Lixoúri, Greece · 16440 days ago · 43 km deep · 73 km away
- 3.944 km NW of Lixoúri, Greece · 16440 days ago · 33 km deep · 91 km away
- 4.037 km W of Lixoúri, Greece · 16439 days ago · 42 km deep · 84 km away
- 4.136 km W of Lixoúri, Greece · 16439 days ago · 37 km deep · 82 km away
- 4.243 km S of Lithakiá, Greece · 16417 days ago · 33 km deep · 79 km away
- 3.67 km SE of Lefkáda, Greece · 16415 days ago · 10 km deep · 85 km away
Before
- 3.734 km WSW of Lixoúri, Greece · 16473 days ago · 33 km deep · 77 km away
- 3.446 km SSE of Lithakiá, Greece · 16485 days ago · 10 km deep · 79 km away
- 4.064 km WSW of Katastárion, Greece · 16491 days ago · 33 km deep · 89 km away
- 3.857 km WSW of Katastárion, Greece · 16492 days ago · 33 km deep · 80 km away
- 3.441 km W of Lixoúri, Greece · 16493 days ago · 33 km deep · 86 km away
- 4.358 km S of Lithakiá, Greece · 16496 days ago · 33 km deep · 94 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0001fef. Read Tue, Sep 22, 2026, 9:35 AM UTC.