M3.3 earthquake 18 km SSW of Kallíthiro, Greece
A magnitude 3.3 earthquake struck 18 km SSW of Kallíthiro, Greece on Sun, Dec 20, 1987, 11:41 AM GMT+2 (09:41 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M4.9 7 km SSE of Kandíla, Greece. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.3 (md), minor
- Local time
- UTC
- 1987-12-20 09:41:25 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 39.124° N, 21.833° 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: 5 in the 60 days after this one and 8 in the 30 days before it.
After
- 3.317 km WSW of Deskáti, Greece · 14154 days ago · 10 km deep · 88 km away
- 3.17 km E of Galatás, Greece · 14143 days ago · 33 km deep · 87 km away
- 4.97 km SSE of Kandíla, Greece · 14124 days ago · 37 km deep · 91 km away
- 3.46 km N of Astakós, Greece · 14123 days ago · 10 km deep · 88 km away
- 3.316 km NNE of Karpenísi, Greece · 14103 days ago · 10 km deep · 7 km away
Before
- 3.02 km NNW of Áno Kastrítsi, Greece · 14158 days ago · 10 km deep · 93 km away
- 3.31 km W of Vónitsa, Greece · 14169 days ago · 10 km deep · 87 km away
- 4.310 km WSW of Galaxídhion, Greece · 14170 days ago · 10 km deep · 96 km away
- 3.09 km WNW of Pátra, Greece · 14175 days ago · 10 km deep · 95 km away
- 4.25 km WSW of Néa Anchiálos, Greece · 14177 days ago · 35 km deep · 81 km away
- 3.18 km NNE of Grammenítsa, Greece · 14178 days ago · 10 km deep · 71 km away
- 3.112 km NE of Kamárai, Greece · 14183 days ago · 10 km deep · 86 km away
- 3.33 km ENE of Rizómylos, Greece · 14186 days ago · 10 km deep · 89 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0003be8. Read Wed, Sep 23, 2026, 5:19 AM UTC.