Moderate mag. 4.3 earthquake - Ionian Sea, 15 km north of Aigio, Achaea, Western Greece, on Friday, 1 Jan 2021 5:55 am (GMT +2) -
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Moderate magnitude 4.3 earthquake at 2 km depth
1 Jan 03:59 UTC: First to report: EMSC after 4 minutes.
1 Jan 04:22: Magnitude recalculated from 3.3 to 3.5. Hypocenter depth recalculated from 2.0 to 0.0 km (from 1.2 to 0 mi).
1 Jan 04:25: Magnitude recalculated from 3.5 to 4.3. Hypocenter depth recalculated from 0.0 to 2.0 km (from 0 to 1.2 mi).
1 Jan 08:30: Epicenter location corrected by 1.4 km (0.9 mi) towards NE.
1 Jan 04:22: Magnitude recalculated from 3.3 to 3.5. Hypocenter depth recalculated from 2.0 to 0.0 km (from 1.2 to 0 mi).
1 Jan 04:25: Magnitude recalculated from 3.5 to 4.3. Hypocenter depth recalculated from 0.0 to 2.0 km (from 0 to 1.2 mi).
1 Jan 08:30: Epicenter location corrected by 1.4 km (0.9 mi) towards NE.
Update Fri, 1 Jan 2021, 04:33
Light magnitude 4.3 quake hits 14 km northwest of Aigio, Greece early morning4.3 quake 1 Jan 5:55 am (GMT +2)
An earthquake of magnitude 4.3 occurred early morning on Friday 1 January 2021 at 5:55 am local time near Aigio, Achaea, West Greece, Greece, as reported by the European-Mediterranean Seismological Centre (EMSC).
According to preliminary data, the quake was located at a very shallow depth of 2 km. Shallow earthquakes are felt more strongly than deeper ones as they are closer to the surface. Magnitude and other quake parameters can still change in the coming hours as the agency continues to process seismic data.
A second report was later issued by NOA_HL, which listed it as a magnitude 3.3 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 Trizonia (pop. 64) located 6 km from the epicenter, Glyfada (pop. 480) 6 km away, Kamarai (pop. 1,200) 7 km away, Longos (pop. 660) 7 km away, Selianitika (pop. 900) 9 km away, Kastraki (pop. 910) 12 km away, and Aigio (pop. 20,400) 14 km away, the quake should have been felt as light shaking.
Weak shaking might have been felt in Nafpaktos (pop. 13,400) located 16 km from the epicenter, and Patrai (pop. 168,000) 27 km away.
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.
According to preliminary data, the quake was located at a very shallow depth of 2 km. Shallow earthquakes are felt more strongly than deeper ones as they are closer to the surface. Magnitude and other quake parameters can still change in the coming hours as the agency continues to process seismic data.
A second report was later issued by NOA_HL, which listed it as a magnitude 3.3 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 Trizonia (pop. 64) located 6 km from the epicenter, Glyfada (pop. 480) 6 km away, Kamarai (pop. 1,200) 7 km away, Longos (pop. 660) 7 km away, Selianitika (pop. 900) 9 km away, Kastraki (pop. 910) 12 km away, and Aigio (pop. 20,400) 14 km away, the quake should have been felt as light shaking.
Weak shaking might have been felt in Nafpaktos (pop. 13,400) located 16 km from the epicenter, and Patrai (pop. 168,000) 27 km away.
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.
Earthquake data:
Date & time: 1 Jan 2021 03:55:20 UTC -
Local time at epicenter: Friday, 1 Jan 2021 5:55 am (GMT +2)
Magnitude: 4.3
Depth: 2.0 km
Epicenter latitude / longitude: 38.37°N / 22.02°E
(Ionian Sea, Greece)Nearest volcano: Sousaki (105 km / 65 mi)
Nearby towns and cities:
5 km (3 mi) W of Trizonia (pop: 64) --> See nearby quakes!
15 km (9 mi) NNW of Aigio (pop: 20,400) --> See nearby quakes!
17 km (11 mi) E of Nafpaktos (pop: 13,400) --> See nearby quakes!
29 km (18 mi) ENE of Patras (pop: 168,000) --> See nearby quakes!
36 km (22 mi) WSW of Amfissa (pop: 6,850) --> See nearby quakes!
36 km (22 mi) W of Itea (pop: 4,780) --> See nearby quakes!
51 km (32 mi) E of Messolonghi (Μεσολόγγι) (pop: 12,800) --> See nearby quakes!
60 km (37 mi) ESE of Agrinio (pop: 46,900) --> See nearby quakes!
86 km (54 mi) NE of Amaliada (pop: 16,800) --> See nearby quakes!
155 km (97 mi) WNW of Athens (pop: 664,000) --> See nearby quakes!
126 km (78 mi) E of Kefalonia Island (pop: 34,500) --> See nearby quakes!
118 km (73 mi) E of Ithaca Island (pop: 3,210) --> See nearby quakes!
Weather at epicenter at time of quake:
Few Clouds
8.3°C (47 F), humidity: 82%, wind: 2 m/s (3 kts) from W
Primary data source: EMSC (European-Mediterranean Seismological Centre)Few Clouds
8.3°C (47 F), humidity: 82%, wind: 2 m/s (3 kts) from WEstimated released energy: 1.8 x 1011 joules (49.4 megawatt hours, equivalent to 42.5 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 4.3 | 2 km | GREECE | EMSC |
| M 3.5 | 9.2 km | 14 Km NW From Aiyion, Greece | NOA |
User reports for this quake
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Earlier earthquakes in the same area
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