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Moderate mag. 4.8 earthquake - Central Greece, 16 km east of Nafpaktos, Aitoloakarnania, Western Greece, on Wednesday, Dec 23, 2020 at 4:58 pm (GMT +2)

Moderate mag. 4.8 earthquake - Central Greece, 16 km east of Nafpaktos, Aitoloakarnania, Western Greece, on Wednesday, Dec 23, 2020 at 4:58 pm (GMT +2) Moderate mag. 4.8 earthquake - Central Greece, 16 km east of Nafpaktos, Aitoloakarnania, Western Greece, on Wednesday, Dec 23, 2020 at 4:58 pm (GMT +2)

Moderate magnitude 4.8 earthquake at 10 km depth

23 Dec 15:02 UTC: First to report: GFZ after 4 minutes.
23 Dec 18:10: Magnitude recalculated from 5.3 to 4.8. Epicenter location corrected by 5.2 km (3.2 mi) towards SSW.
Update Wed, 23 Dec 2020, 15:06

Significant earthquake of magnitude 5.3 just reported 19 km northeast of Nafpaktos, Greece

5.3 quake 23 Dec 4:58 pm (GMT +2)
5.3 quake 23 Dec 4:58 pm (GMT +2)
A magnitude 5.3 earthquake near Nafpaktos, Aitoloakarnania, West Greece, Greece, was reported only 8 minutes ago by the German Research Centre for Geosciences (GFZ), considered one of the key international agencies that monitor seismic activity worldwide. The earthquake occurred at a shallow depth of 10 km beneath the epicenter in the afternoon on Wednesday 23 December 2020 at 4:58 pm local time. 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 European-Mediterranean Seismological Centre (EMSC), which listed it as a magnitude 4.8 earthquake.
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 Nafpaktos (pop. 13,400) located 19 km from the epicenter, Aigio (pop. 20,400) 22 km away, Rio (pop. 4,700) 27 km away, Galaxidi (pop. 3,000) 30 km away, Amfissa (pop. 6,900) 31 km away, Itea (pop. 4,800) 34 km away, and Patrai (pop. 168,000) 34 km away, the quake should have been felt as light shaking.
Weak shaking might have been felt in Lamia (pop. 52,000) located 62 km from the epicenter.
VolcanoDiscovery will automatically update magnitude and depth if these change and follow up if other significant news about the quake become available. If you're in the area, please send us your experience through our reporting mechanism, either online or via our mobile app. This will help us provide more first-hand updates to anyone around the globe who wants to know more about this quake.

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Earthquake details

Date & timeDec 23, 2020 14:58:26 UTC
Local time at epicenterWednesday, Dec 23, 2020 at 4:58 pm (GMT +2)
StatusConfirmed
Magnitude4.8
Depth10.0 km
Epicenter latitude / longitude38.4°N / 22.01°E (Phocis, Central Greece, Greece)
Antipode38.4°S / 157.99°W
Shaking intensityWeak shaking
Felt2 reports
Primary data sourceGFZ (German Research Centre for Geosciences)
Nearest volcanoSousaki (108 km / 67 mi)
Nearby towns and cities10 km (6 mi) E of Kastraki (Phocis) (pop: 912) | Show on map | Quakes nearby
16 km (10 mi) E of Nafpaktos (West Greece) (pop: 13,400) | Show on map | Quakes nearby
18 km (11 mi) NNW of Aigio (West Greece) (pop: 20,400) | Show on map | Quakes nearby
30 km (18 mi) NE of Patras (West Greece) (pop: 168,000) | Show on map | Quakes nearby
58 km (36 mi) ESE of Agrinio (West Greece) (pop: 46,900) | Show on map | Quakes nearby
67 km (41 mi) SSW of Lamia (pop: 52,000) | Show on map | Quakes nearby
76 km (47 mi) W of Livadia (Levádhia) (pop: 21,500) | Show on map | Quakes nearby
95 km (59 mi) NNE of Pyrgos (Pirgos, West Greece) (pop: 22,400) | Show on map | Quakes nearby
97 km (60 mi) WNW of Corinto (Peloponnese) (pop: 30,200) | Show on map | Quakes nearby
157 km (98 mi) WNW of Athens (Attica) (pop: 664,000) | Show on map | Quakes nearby
Weather at epicenter at time of quakeFew Clouds 7.5°C (45 F), humidity: 85%, wind: 2 m/s (3 kts) from W
Estimated seismic energy released1 x 1012 joules (278 megawatt hours, equivalent to 239 tons of TNT) | about seismic energy
Show interactive Map
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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.
Mag.DepthLocationSource
4.810 km- 12 km NNE of Kamárai, GreeceGFZ
4.62 kmGREECEEMSC
4.513 kmNavpaktos / Griechenland, GreeceZAMG
4.58 kmGreeceNOA
4.89.6 km12 Km NNE of Kamárai, GreeceUSGS
4.45 kmGreeceNIEP

Seismograms

Seismic station: Ankara, Turkey (ANTO/IU network) | Distance from quake: 944 km / 586 mi | Show on map | Station Info
Seismic station Ankara, Turkey: vertical movement plot around time of quake (source: IRIS/BUD)
Seismogram (vertical component) around time of quake. Thin dotted red line indicates time of quake. Seismic waves arrive some time later, depending on distance. Source: IRIS Buffer of Uniform Data (BUD) webtool
Show more

User reports for this quake (8)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Contribute:
Leave a comment if you find a particular report interesting or want to add to it.
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Trizonia / Weak shaking (MMI III) / 2-5 s : We were on a boat in the south bay of trizonia island. We felt vibrations in the boat and the doors rattled a bit. There were no other signs. | 4 users found this interesting.  
  • Maybe the engine
Trizonia / Weak shaking (MMI III) / 2-5 s : We were on a boat in the south bay of trizonia island. We felt vibrations in the boat and the doors rattled a bit. There were no other signs.  
Iraklion, Crete (439.9 km SE of epicenter) [Map] / not felt (reported through our app)
Augusta, Syracuse, Sicily (610.1 km W of epicenter) [Map] / not felt (reported through our app)
Galatsi, Nomarchía Athínas, Attica (156.1 km ESE of epicenter) [Map] / not felt (reported through our app)
Banī Suwayf (1333.9 km SE of epicenter) [Map] / not felt (reported through our app)
Shibîn el-Qanâṭir, Qalyubia (1245.6 km SE of epicenter) [Map] / not felt (reported through our app)
Sankt Martin, Linz-Land, Upper Austria (1260 km NNW of epicenter) [Map] / not felt (reported through our app)

Earlier earthquakes in the same area

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