M7.7 earthquake 19 km SSE of Amorgós, Greece
A magnitude 7.7 earthquake struck 19 km SSE of Amorgós, Greece on Mon, Jul 9, 1956, 5:11 AM GMT+2 (03:11 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
- 7.7 (mw), major
- Local time
- UTC
- 1956-07-09 03:11:45 UTC
- Depth
- 20.0 km (12.4 mi), shallow
- Epicenter
- 36.664° N, 25.957° E
- Region
- Greece
- Strongest shaking
- VIII, severe shaking
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Shaking
The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.
- Strongest estimated
- VIII, severe shaking
- Peak ground acceleration
- 58.5% of gravity
- Peak ground velocity
- 55.3 cm/s
- Map
- Automatic
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: 7 in the 60 days after this one and 0 in the 30 days before it.
After
- 5.525 km SSW of Amorgós, Greece · 25642 days ago · 15 km deep · 16 km away
- 5.522 km E of Amorgós, Greece · 25641 days ago · 15 km deep · 26 km away
- 5.340 km ESE of Emporeío, Greece · 25641 days ago · 15 km deep · 49 km away
- 5.7Dodecanese Islands, Greece · 25641 days ago · 15 km deep · 23 km away
- 5.415 km ENE of Astypálaia, Greece · 25629 days ago · 15 km deep · 48 km away
- 6.163 km N of Sitia, Greece · 25621 days ago · 15 km deep · 99 km away
- 5.758 km SE of Emporeío, Greece · 25621 days ago · 15 km deep · 74 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event iscgem888445. Read Tue, Sep 22, 2026, 2:36 AM UTC.