Light mag. 3.8 earthquake - Aegean Sea, 15 km south of Nisida Garmpias Island, Lesvos, North Aegean, Greece, on Monday, 1 Feb 2021 7:03 am (GMT +2) -
This quake was likely a foreshock of the 4.8 quake Aegean Sea, 12 km south of Nisida Garmpias Island, Lesbos, North Aegean, Greece, 1 Feb 2021 7:47 am (GMT +2), which followed after 45 minutes.
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Light magnitude 3.8 earthquake at 16 km depth
1 Feb 05:07 UTC: First to report: EMSC after 4 minutes.
1 Feb 05:08: Now using data updates from NOA
1 Feb 05:40: Magnitude recalculated from 3.9 to 3.8. Hypocenter depth recalculated from 16.3 to 16.1 km (from 10.1 to 10 mi). Epicenter location corrected by 3.8 km (2.4 mi) towards ESE.
1 Feb 05:08: Now using data updates from NOA
1 Feb 05:40: Magnitude recalculated from 3.9 to 3.8. Hypocenter depth recalculated from 16.3 to 16.1 km (from 10.1 to 10 mi). Epicenter location corrected by 3.8 km (2.4 mi) towards ESE.
Date & time: 1 Feb 2021 05:03:24 UTC -
Local time at epicenter: Monday, 1 Feb 2021 7:03 am (GMT +2)
Magnitude: 3.8
Depth: 16.1 km
Epicenter latitude / longitude: 38.9442°N / 26.0957°E

Nearest volcano: Kenger (196 km / 122 mi)
Nearby towns and cities:
10 km (6 mi) SW of Agios Fokas (pop: 16) --> See nearby quakes!
28 km (18 mi) WSW of Agiasos (pop: 2,320) --> See nearby quakes!
29 km (18 mi) SSE of Eresos (pop: 1,040) --> See nearby quakes!
37 km (23 mi) SSW of Ayia Paraskevi (pop: 2,200) --> See nearby quakes!
43 km (27 mi) S of Petras (pop: 1,300) --> See nearby quakes!
44 km (27 mi) WSW of Mytilene (Mitilini) (pop: 28,300) --> See nearby quakes!
64 km (40 mi) N of Chios (pop: 24,000) --> See nearby quakes!
66 km (41 mi) SW of Ayvalik (Turkey) (pop: 70,000) --> See nearby quakes!
78 km (48 mi) WNW of Aliağa (Turkey) (pop: 44,900) --> See nearby quakes!
232 km (144 mi) ENE of Athens (pop: 664,000) --> See nearby quakes!
Weather at epicenter at time of quake:
Few Clouds
15.6°C (60 F), humidity: 72%, wind: 10 m/s (20 kts) from S
Primary data source: NOA (National Observatory of Athens)Few Clouds

Estimated released energy: 3.2 x 1010 joules (8.78 megawatt hours, equivalent to 7.56 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 |
3.8 | 16 km | 44 Km WSW From Mitilini, Greece | NOA |
3.9 | 10 km | 35 Km WSW From Mitilini, Greece | EMSC |
4.1 | 9 km | AEGEAN SEA, Greece | KOERI-RETMC |
4.3 | 9 km | Near the Coast of Western Turkey | NIEP |
3.8 | 16 km | Polikhnitos / Ägäis, Greece | ZAMG |
4.2 | 10 km | Aegean Sea, Greece | GFZ |
User reports for this quake (3)
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Leave a comment if you find a particular report interesting or want to add to it.
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Send your own user report!
Sarimsakki/ Atvalik / Light shaking (MMI IV) / horizontal (sideways) swinging / 5-10 s : I was lying in bed, intense short shaking of the house, scary, jumping out of bed ready to run outside when it stopped 10 minutes later again was a shorter and less intense shaking
Istanbul, kucukcekmece / Weak shaking (MMI III) / horizontal (sideways) swinging / 2-5 s : .
İzmir Türkiye / Light shaking (MMI IV)
Earlier earthquakes in the same area since 1900
- Date / time UTC| Mag |Depth|Age|Distance| Details
- 08 Nov 1905 22:06| 7.4 |15km / 9.3mi|116 years ago|184km / 115mi| Aegean Sea, 10.1 km E of Patitiri, Magnesia, Thessaly, Greece
- 18 Mar 1953 19:06| 7.3 |10km / 6.2mi|68 years ago|191km / 119mi| 7.8 km N of Gönen, Balıkesir, Turkey
- 19 Dec 1981 14:10| 7.2 |10km / 6.2mi|39 years ago|82km / 51mi| Aegean Sea, 125 km NW of Chios, North Aegean, Greece
- 19 Feb 1968 22:45| 7.2 |15km / 9.3mi|53 years ago|109km / 68mi| Aegean Sea, 57 km S of Myrina, Lesvos, North Aegean, Greece
- 09 Aug 1912 01:29| 7.1 |15km / 9.3mi|109 years ago|204km / 127mi| 30 km S of Malkara, Tekirdağ, Turkey
- 06 Oct 1944 02:34| 6.8 |15km / 9.3mi|77 years ago|76km / 47mi| Aegean Sea, 22 km NW of Ayvalik, Balıkesir, Turkey
- 30 Oct 2020 11:51| 6.7 |2km / 1.2mi|25 weeks ago|129km / 80mi| Aegean Sea, 17 km NE of Karlovasi, Samos, North Aegean, Greece
- 04 Mar 1967 17:58| 6.6 |15km / 9.3mi|54 years ago|123km / 77mi| Aegean Sea, 24 km NE of Skýros, Euboea, Central Greece
- 27 Dec 1981 17:39| 6.5 |13.3km / 8.3mi|39 years ago|103km / 64mi| Aegean Sea, 31 km E of Skyros Island, Euboea, Central Greece
- 23 Jul 1949 15:03| 6.5 |15km / 9.3mi|72 years ago|40km / 25mi| Aegean Sea, 10.1 km NW of Karaburun, Izmir, Turkey
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