Light mag. 3.9 earthquake - Ionian Sea, 9 km east of Kefalonia Island, Greece, on 11 Apr 3:17 am (GMT +3) -

Light mag. 3.9 earthquake - Ionian Sea, 9 km east of Kefalonia Island, Greece, on 11 Apr 3:17 am (GMT +3)

Light magnitude 3.9 earthquake at 16 km depth

11 Apr 00:22 UTC: First to report: EMSC after 5 minutes.
11 Apr 00:22: Now using data updates from NOA
11 Apr 00:25: Magnitude recalculated from 3.9 to 3.8.
11 Apr 01:08: Magnitude recalculated from 3.8 to 3.9. Hypocenter depth recalculated from 10.0 to 15.5 km (from 6.2 to 9.6 mi). Epicenter location corrected by 4.9 km (3.1 mi) towards SSW.
Date & time: 11 Apr 2021 00:17:13 UTC -
Local time at epicenter: 11 Apr 3:17 am (GMT +3)
Magnitude: 3.9
Depth: 15.5 km
Epicenter latitude / longitude: 38.2732°N / 20.6822°E (Ionian Sea, Ionian Islands, Greece)
Nearest volcano: Sousaki (213 km / 132 mi)
Nearby towns and cities:
4 km (2 mi) NE of Samos (Kefallonia) (pop: 1,350) --> See nearby quakes!
11 km (7 mi) SSW of Ithaki (pop: 1,840) --> See nearby quakes!
15 km (10 mi) NNW of Poros (pop: 1,060) --> See nearby quakes!
20 km (12 mi) ENE of Argostoli (pop: 9,820) --> See nearby quakes!
74 km (46 mi) WSW of Agrinio (West Greece) (pop: 46,900) --> See nearby quakes!
76 km (47 mi) S of Preveza (Préveza, Epirus) (pop: 17,300) --> See nearby quakes!
79 km (49 mi) NW of Amaliada (West Greece) (pop: 16,800) --> See nearby quakes!
92 km (57 mi) W of Patras (West Greece) (pop: 168,000) --> See nearby quakes!
164 km (102 mi) SSE of Corfu (Kerkira) (pop: 27,000) --> See nearby quakes!
268 km (167 mi) W of Athens (Attica) (pop: 664,000) --> See nearby quakes!
113 km (70 mi) SSE of Paxi Island (pop: 2,300) --> See nearby quakes!
105 km (65 mi) SSE of Antipaxos Island (pop: 20) --> See nearby quakes!
164 km (102 mi) SSE of Corfu Island (pop: 23) --> See nearby quakes!
Weather at epicenter at time of quake:
Clear Sky 6°C (43 F), humidity: 93%, wind: 2 m/s (5 kts) from WNW
Primary data source: NOA (National Observatory of Athens)
Estimated released energy: 4.5 x 1010 joules (12.4 megawatt hours, equivalent to 10.7 tons of TNT) More info
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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
3.916 km6 Km SSW From Ithaki, GreeceNOA
4.25 kmGREECEEMSC
unknownn/aNear Argostoli, Ionian Islands, GreeceVolcanoDiscovery
4.210 km1 Km SSW of Sámi, GreeceUSGS
3.916 kmIthaki / Griechenland, GreeceZAMG

User reports for this quake (3)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
18.5 km WSW of epicenter [Map] / Very weak shaking (MMI II) / rattling, vibrating / very short
Argostoli kefalonia (21.6 km SW of epicenter) [Map] / Weak shaking (MMI III) / rattling, vibrating / 2-5 s
Poros / Weak shaking (MMI III) / rattling, vibrating / 2-5 s
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