Moderate mag. 4.7 earthquake - Aegean Sea, 18 km south of Nisida Garmpias Island, Lesvos, North Aegean, Greece, on Monday, 1 Feb 2021 10:35 am (GMT +2) -

This quake was likely a foreshock of the 4.6 quake Aegean Sea, 39 km southwest of Mytilene, Lesvos, North Aegean, Greece, 1 Feb 2021 10:46 pm (GMT +2), which followed after 12 hours.
Moderate mag. 4.7 earthquake - Aegean Sea, 18 km south of Nisida Garmpias Island, Lesvos, North Aegean, Greece, on Monday, 1 Feb 2021 10:35 am (GMT +2)

Moderate magnitude 4.7 earthquake at 16 km depth

1 Feb 08:40 UTC: First to report: NOA after 5 minutes.
1 Feb 08:41: Magnitude recalculated from 4.5 to 4.6. Epicenter location corrected by 2.6 km (1.6 mi) towards SSW.
1 Feb 08:47: Magnitude recalculated from 4.6 to 4.8. Hypocenter depth recalculated from 10.0 to 17.3 km (from 6.2 to 10.7 mi). Epicenter location corrected by 45 km (28 mi) towards NE.
1 Feb 12:16: Magnitude recalculated from 4.8 to 4.7. Hypocenter depth recalculated from 17.3 to 16.2 km (from 10.7 to 10.1 mi).
Update Mon, 1 Feb 2021, 08:45
Moderate magnitude 4.6 quake hits 46 km northwest of Chios, Greece in the morning
4.6 quake 1 Feb 10:35 am (GMT +2)
4.6 quake 1 Feb 10:35 am (GMT +2)
An earthquake of magnitude 4.6 occurred in the morning on Monday 1 February 2021 at 10:35 am local time near Chios, North Aegean, Greece, as reported by the National Observatory of Athens (NOA).
According to preliminary data, the quake was located at a shallow depth of 10 km. Shallow earthquakes are felt more strongly than deeper ones as they are closer to the surface. 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.
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 Agion Gala (pop. 38) located 14 km from the epicenter, the quake should have been felt as light shaking.
Weak shaking might have been felt in Vrontados (pop. 5,300) located 43 km from the epicenter, Chios (pop. 24,000) 46 km away, Thymiana (pop. 1,600) 50 km away, and Polichnitos (pop. 2,700) 63 km away.
Other towns or cities near the epicenter where the quake might have been felt as very weak shaking include Agiasos (pop. 2,300) located 75 km from the epicenter, Mytilene (pop. 28,300) 89 km away, Foça (pop. 15,200) 90 km away, and Urla (pop. 45,200) 97 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.
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Earthquake data:

Date & time: 1 Feb 2021 08:35:17 UTC -
Local time at epicenter: Monday, 1 Feb 2021 10:35 am (GMT +2)
Magnitude: 4.7
Depth: 16.2 km
Epicenter latitude / longitude: 38.9182°N / 26.0898°E (Aegean Sea, Greece)
Nearest volcano: Akyarlar (231 km / 144 mi)
Nearby towns and cities:
12 km (8 mi) SW of Agios Fokas (pop: 16) --> See nearby quakes!
45 km (28 mi) WSW of Mytilene (Mitilini) (pop: 28,300) --> See nearby quakes!
61 km (38 mi) N of Chios (pop: 24,000) --> See nearby quakes!
68 km (43 mi) NNW of Çeşme (Turkey) (pop: 21,300) --> See nearby quakes!
69 km (43 mi) SW of Ayvalik (Turkey) (pop: 70,000) --> See nearby quakes!
78 km (48 mi) W of Aliağa (Turkey) (pop: 44,900) --> See nearby quakes!
88 km (55 mi) NW of Urla (Turkey) (pop: 45,200) --> See nearby quakes!
92 km (57 mi) WNW of Menemen (Turkey) (pop: 53,500) --> See nearby quakes!
97 km (60 mi) WSW of Bergama (Turkey) (pop: 57,200) --> See nearby quakes!
230 km (143 mi) ENE of Athens (pop: 664,000) --> See nearby quakes!
36 km (22 mi) SSW of Lesvos Island (pop: 86,400) --> See nearby quakes!
187 km (116 mi) ENE of Euboea Island (pop: 198,100) --> See nearby quakes!
Weather at epicenter at time of quake:
Few Clouds 18°C (64 F), humidity: 72%, wind: 11 m/s (22 kts) from SSE
Primary data source: NOA (National Observatory of Athens)
Estimated released energy: 7.1 x 1011 joules (197 megawatt hours, equivalent to 169 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.
MagnitudeDepthLocationSource
4.716 km17 Km NE From Psara, GreeceNOA

User reports for this quake (5)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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77.6 km E of epicenter [Map] / Light shaking (MMI IV) : I was lying down, it was a common winter shake that we are used to living in this area  
102.3 km ESE of epicenter [Map] / Light shaking (MMI IV) (reported through our app)
Gaziemir Izmir / Light shaking (MMI IV) / 2-5 s
Mytilene / Moderate shaking (MMI V) / 5-10 s
Gaziemir Izmir / Light shaking (MMI IV) / 2-5 s
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