Light mag. 3.7 earthquake - 5 km northwest of Glyfada, Phocis, Central Greece, on Wednesday, 23 Dec 2020 10:02 pm (GMT +2) -
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Light magnitude 3.7 earthquake at 8 km depth
23 Dec 20:06 UTC: First to report: EMSC after 4 minutes.
23 Dec 20:08: Magnitude recalculated from 3.6 to 4.2. Epicenter location corrected by 1.1 km (0.7 mi) towards S.
23 Dec 22:01: Now using data updates from NOA
23 Dec 20:08: Magnitude recalculated from 3.6 to 4.2. Epicenter location corrected by 1.1 km (0.7 mi) towards S.
23 Dec 22:01: Now using data updates from NOA
Update Wed, 23 Dec 2020, 20:15
Light 4.2 quake hits near Glyfada, Greece4.2 quake 23 Dec 10:02 pm (GMT +2)
A very shallow magnitude 4.2 earthquake was reported late at night near Glyfada, Phocis, Central Greece, Greece.
According to the European-Mediterranean Seismological Centre (EMSC), the quake hit on Wednesday 23 December 2020 at 10:02 pm local time at a very shallow depth of 2 km. Shallow earthquakes are felt more strongly than deeper ones as they are closer to the surface. The exact magnitude, epicenter, and depth of the quake might be revised within the next few hours or minutes as seismologists review data and refine their calculations, or as other agencies issue their report.
A second report was later issued by the German Research Centre for Geosciences (GFZ), which listed it as a magnitude 4.2 earthquake as well.
Based on the preliminary seismic data, the quake was probably felt by many people in the area of the epicenter. It should not have caused significant damage, other than objects falling from shelves, broken windows, etc.
In Glyfada (pop. 480) located 5 km from the epicenter, Longos (pop. 660) 7 km away, Kamarai (pop. 1,200) 7 km away, Selianitika (pop. 900) 9 km away, Aigio (pop. 20,400) 13 km away, and Kastraki (pop. 910) 13 km away, the quake should have been felt as light shaking.
Weak shaking might have been felt in Témeni (pop. 1,100) located 16 km from the epicenter, Nafpaktos (pop. 13,400) 18 km away, and Patrai (pop. 168,000) 29 km away.
According to the European-Mediterranean Seismological Centre (EMSC), the quake hit on Wednesday 23 December 2020 at 10:02 pm local time at a very shallow depth of 2 km. Shallow earthquakes are felt more strongly than deeper ones as they are closer to the surface. The exact magnitude, epicenter, and depth of the quake might be revised within the next few hours or minutes as seismologists review data and refine their calculations, or as other agencies issue their report.
A second report was later issued by the German Research Centre for Geosciences (GFZ), which listed it as a magnitude 4.2 earthquake as well.
Based on the preliminary seismic data, the quake was probably felt by many people in the area of the epicenter. It should not have caused significant damage, other than objects falling from shelves, broken windows, etc.
In Glyfada (pop. 480) located 5 km from the epicenter, Longos (pop. 660) 7 km away, Kamarai (pop. 1,200) 7 km away, Selianitika (pop. 900) 9 km away, Aigio (pop. 20,400) 13 km away, and Kastraki (pop. 910) 13 km away, the quake should have been felt as light shaking.
Weak shaking might have been felt in Témeni (pop. 1,100) located 16 km from the epicenter, Nafpaktos (pop. 13,400) 18 km away, and Patrai (pop. 168,000) 29 km away.
Earthquake data:
Date & time: 23 Dec 2020 20:02:24 UTC -
Local time at epicenter: Wednesday, 23 Dec 2020 10:02 pm (GMT +2)
Magnitude: 3.7
Depth: 8.0 km
Epicenter latitude / longitude: 38.4096°N / 22.0326°E
(Phocis, Central Greece, Greece)Nearest volcano: Sousaki (103 km / 64 mi)
Nearby towns and cities:
5 km (3 mi) NW of Glyfada (pop: 477) --> See nearby quakes!
18 km (11 mi) E of Nafpaktos (West Greece) (pop: 13,400) --> See nearby quakes!
18 km (11 mi) NNW of Aigio (West Greece) (pop: 20,400) --> See nearby quakes!
32 km (20 mi) NE of Patras (West Greece) (pop: 168,000) --> See nearby quakes!
33 km (20 mi) WSW of Amfissa (pop: 6,850) --> See nearby quakes!
34 km (21 mi) W of Itea (pop: 4,780) --> See nearby quakes!
42 km (26 mi) NE of Vrachnaiika (West Greece) (pop: 2,570) --> See nearby quakes!
49 km (30 mi) W of Arachova (pop: 2,660) --> See nearby quakes!
65 km (40 mi) SSW of Lamia (pop: 52,000) --> See nearby quakes!
156 km (97 mi) WNW of Athens (Attica) (pop: 664,000) --> See nearby quakes!
128 km (79 mi) E of Kefalonia Island (pop: 34,500) --> See nearby quakes!
119 km (74 mi) E of Ithaca Island (pop: 3,210) --> See nearby quakes!
140 km (87 mi) NW of Nisi Agkistri Island (pop: 1,140) --> See nearby quakes!
Primary data source: NOA (National Observatory of Athens)
Estimated released energy: 2.2 x 1010 joules (6.22 megawatt hours, equivalent to 5.35 tons of TNT) More info
Data for the same earthquake reported by different agencies
Info: The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.
| Magnitude | Depth | Location | Source |
| M 3.7 | 8 km | Greece | NOA |
| M 4.2 | 10 km | Greece | GFZ |
| M 4.2 | km | GREECE | EMSC |
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