Weak mag. 3.0 earthquake - Aegean Sea, 21 km south of Nisida Garmpias Island, Lesvos, North Aegean, Greece, on Sunday, 31 Jan 2021 11:42 pm (GMT +2) -
This quake was likely a foreshock of the 5.1 quake Aegean Sea, 15 km southeast of Nisida Garmpias Island, Greece, 1 Feb 2021 10:35 am (GMT +2), which followed after 11 hours.
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Weak magnitude 3.0 earthquake at 16 km depth
31 Jan 21:47 UTC: First to report: NOA after 5 minutes.
31 Jan 21:50: Epicenter location corrected by 6.7 km (4.2 mi) towards ENE.
31 Jan 21:59: Magnitude recalculated from 2.9 to 3.0. Hypocenter depth recalculated from 10.0 to 15.6 km (from 6.2 to 9.7 mi). Epicenter location corrected by 26 km (16 mi) towards WSW.
31 Jan 21:50: Epicenter location corrected by 6.7 km (4.2 mi) towards ENE.
31 Jan 21:59: Magnitude recalculated from 2.9 to 3.0. Hypocenter depth recalculated from 10.0 to 15.6 km (from 6.2 to 9.7 mi). Epicenter location corrected by 26 km (16 mi) towards WSW.
Date & time: 31 Jan 2021 21:42:27 UTC -
Local time at epicenter: Sunday, 31 Jan 2021 11:42 pm (GMT +2)
Magnitude: 3
Depth: 15.6 km
Epicenter latitude / longitude: 38.893°N / 26.1287°E

Nearest volcano: Kenger (179 km / 111 mi)
Nearby towns and cities:
13 km (8 mi) SSW of Agios Fokas (pop: 16) --> See nearby quakes!
30 km (19 mi) SW of Agiasos (pop: 2,320) --> See nearby quakes!
35 km (22 mi) SSE of Eresos (pop: 1,040) --> See nearby quakes!
38 km (24 mi) S of Kalloni (pop: 1,780) --> See nearby quakes!
44 km (27 mi) WSW of Mytilene (Mitilini) (pop: 28,300) --> See nearby quakes!
58 km (36 mi) N of Chios (pop: 24,000) --> See nearby quakes!
65 km (40 mi) NNW of Çeşme (Turkey) (pop: 21,300) --> See nearby quakes!
68 km (42 mi) SW of Ayvalik (Turkey) (pop: 70,000) --> See nearby quakes!
74 km (46 mi) W of Aliağa (Turkey) (pop: 44,900) --> See nearby quakes!
232 km (144 mi) ENE of Athens (pop: 664,000) --> See nearby quakes!
37 km (23 mi) SSW of Lesvos Island (pop: 86,400) --> See nearby quakes!
Weather at epicenter at time of quake:
Few Clouds
14°C (57 F), humidity: 77%, wind: 10 m/s (20 kts) from S
Primary data source: NOA (National Observatory of Athens)Few Clouds

Estimated released energy: 2 x 109 joules (554 kilowatt hours, equivalent to 0.477 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 |
3.0 | 10 km | NEAR THE COAST OF WESTERN TURKEY | EMSC |
3.0 | 16 km | 43 Km N From Oinoussai, Greece | NOA |
3.1 | 9 km | AEGEAN SEA, Greece | KOERI-RETMC |
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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There are no user reports for this quake yet. If you felt it Earlier earthquakes in the same area since 1900
- Date / time UTC| Mag |Depth|Age|Distance| Details
- 09 Jul 1956 03:11| 7.7 |20km / 12.4mi|65 years ago|248km / 154mi| Aegean Sea, 19 km S of Amorgos, Nomos Kykladon, South Aegean, Greece
- 08 Nov 1905 22:06| 7.4 |15km / 9.3mi|116 years ago|188km / 117mi| Aegean Sea, 10.1 km E of Patitiri, Magnesia, Thessaly, Greece
- 18 Mar 1953 19:06| 7.3 |10km / 6.2mi|68 years ago|193km / 120mi| 7.8 km N of Gönen, Balıkesir, Turkey
- 19 Dec 1981 14:10| 7.2 |10km / 6.2mi|39 years ago|87km / 54mi| Aegean Sea, 125 km NW of Chios, North Aegean, Greece
- 19 Feb 1968 22:45| 7.2 |15km / 9.3mi|53 years ago|114km / 71mi| Aegean Sea, 57 km S of Myrina, Lesvos, North Aegean, Greece
- 09 Aug 1912 01:29| 7.1 |15km / 9.3mi|109 years ago|209km / 130mi| 30 km S of Malkara, Tekirdağ, Turkey
- 06 Oct 1944 02:34| 6.8 |15km / 9.3mi|77 years ago|79km / 49mi| Aegean Sea, 22 km NW of Ayvalik, Balıkesir, Turkey
- 30 Oct 2020 11:51| 6.7 |2km / 1.2mi|25 weeks ago|123km / 76mi| Aegean Sea, 17 km NE of Karlovasi, Samos, North Aegean, Greece
- 04 Mar 1967 17:58| 6.6 |15km / 9.3mi|54 years ago|127km / 79mi| Aegean Sea, 24 km NE of Skýros, Euboea, Central Greece
- 27 Dec 1981 17:39| 6.5 |13.3km / 8.3mi|39 years ago|106km / 66mi| Aegean Sea, 31 km E of Skyros Island, Euboea, Central Greece
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