Moderate mag. 4.2 earthquake - Ionian Sea, 53 km west of Amaliada, Ilia Prefecture, Western Greece, on Sunday, 28 Feb 2021 2:26 pm (GMT +2) -
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Moderate magnitude 4.2 earthquake at 19 km depth
28 Feb 12:29 UTC: First to report: EMSC after 3 minutes.
28 Feb 12:31: Now using data updates from NOA
28 Feb 14:21: Hypocenter depth recalculated from 20.6 to 19.0 km (from 12.8 to 11.8 mi).
28 Feb 12:31: Now using data updates from NOA
28 Feb 14:21: Hypocenter depth recalculated from 20.6 to 19.0 km (from 12.8 to 11.8 mi).
Update Sun, 28 Feb 2021, 12:33
Moderate tremor of magnitude 4.2 just reported 56 km northwest of Amaliada, Greece4.2 quake 28 Feb 2:26 pm (GMT +2)
A magnitude 4.2 earthquake near Amaliada, Ilia Prefecture, Western Greece, Greece, was reported only 7 minutes ago by the National Observatory of Athens (NOA), considered the main national agency that monitors seismic activity in Greece. The earthquake occurred at a shallow depth of 10 km beneath the epicenter early afternoon on Sunday 28 February 2021 at 2:26 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 4.5 earthquake. A third agency, the German Research Centre for Geosciences (GFZ), reported the same quake at magnitude 4.5.
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 Korithi (pop. 48) located 7 km from the epicenter, the quake should have been felt as light shaking.
Weak shaking might have been felt in Katastari (pop. 1,400) located 14 km from the epicenter, Gaitani (pop. 1,900) 22 km away, Zakynthos (pop. 11,500) 24 km away, Argostoli (pop. 9,800) 34 km away, and Lixouri (pop. 3,800) 38 km away.
Other towns or cities near the epicenter where the quake might have been felt as very weak shaking include Gastouni (pop. 8,100) located 45 km from the epicenter, Amaliada (pop. 16,800) 56 km away, and Pýrgos (pop. 22,400) 68 km away.
A second report was later issued by the European-Mediterranean Seismological Centre (EMSC), which listed it as a magnitude 4.5 earthquake. A third agency, the German Research Centre for Geosciences (GFZ), reported the same quake at magnitude 4.5.
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 Korithi (pop. 48) located 7 km from the epicenter, the quake should have been felt as light shaking.
Weak shaking might have been felt in Katastari (pop. 1,400) located 14 km from the epicenter, Gaitani (pop. 1,900) 22 km away, Zakynthos (pop. 11,500) 24 km away, Argostoli (pop. 9,800) 34 km away, and Lixouri (pop. 3,800) 38 km away.
Other towns or cities near the epicenter where the quake might have been felt as very weak shaking include Gastouni (pop. 8,100) located 45 km from the epicenter, Amaliada (pop. 16,800) 56 km away, and Pýrgos (pop. 22,400) 68 km away.
Earthquake data:
Date & time: 28 Feb 2021 12:26:03 UTC -
Local time at epicenter: Sunday, 28 Feb 2021 2:26 pm (GMT +2)
Magnitude: 4.2
Depth: 19.0 km
Epicenter latitude / longitude: 37.9015°N / 20.7664°E
(Ionian Sea, Greece)Nearest volcano: Sousaki (205 km / 127 mi)
Nearby towns and cities:
4 km (3 mi) ENE of Mikro Nisi (pop: 38) --> See nearby quakes!
18 km (11 mi) NW of Zakynthos (pop: 11,500) --> See nearby quakes!
28 km (17 mi) S of Poros (pop: 1,060) --> See nearby quakes!
31 km (19 mi) W of Arkoudi (pop: 1,310) --> See nearby quakes!
33 km (21 mi) W of Kyllini (pop: 1,080) --> See nearby quakes!
39 km (25 mi) SE of Argostoli (pop: 9,820) --> See nearby quakes!
43 km (27 mi) W of Gastouni (pop: 8,110) --> See nearby quakes!
53 km (33 mi) WNW of Amaliada (pop: 16,800) --> See nearby quakes!
64 km (40 mi) WNW of Pýrgos (Pirgos) (pop: 22,400) --> See nearby quakes!
260 km (162 mi) W of Athens (pop: 664,000) --> See nearby quakes!
42 km (26 mi) SSE of Kefalonia Island (pop: 34,500) --> See nearby quakes!
Weather at epicenter at time of quake:
Few Clouds
18°C (64 F), humidity: 68%, wind: 3 m/s (5 kts) from NNE
Primary data source: NOA (National Observatory of Athens)Few Clouds
18°C (64 F), humidity: 68%, wind: 3 m/s (5 kts) from NNEEstimated released energy: 1.3 x 1011 joules (35 megawatt hours, equivalent to 30.1 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 |
| 4.2 | 19 km | 13 Km NE From Volimes, Greece | NOA |
| 4.5 | 10 km | Ionian Sea, Greece | GFZ |
| 4.5 | 10 km | IONIAN SEA, Greece | EMSC |
| 4.5 | 10 km | 4 Km SW of Katastárion, Greece | USGS |
| 4.1 | 10 km | Ionian Sea, Greece | NIEP |
| 4.5 | 10 km | Katastarion / Griechenland, Greece | ZAMG |
User reports for this quake (7)
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6.8 km SSW of epicenter [Map] / Moderate shaking (MMI V) / rattling, vibrating / 1-2 s : Quite a strong shake | 4 users found this interesting. (reported through our app)
92 km ENE of epicenter [Map] / Very weak shaking (MMI II) / 2-5 s (reported through our app)
Village Sarlata, Argostoli / Light shaking (MMI IV) / 2-5 s
Kalamaki Beach (21 km SSE of epicenter) [Map] / Moderate shaking (MMI V) / 5-10 s
Zakynthos / Strong shaking (MMI VI)
Alikanas zakynthos (13.1 km SE of epicenter) [Map] / Moderate shaking (MMI V) / 2-5 s
Argostoli / Light shaking (MMI IV) / rattling, vibrating / 2-5 s
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