Moderate mag. 3.9 earthquake - 83 km southwest of İzmir, Turkey, Greece, on Saturday, 31 Oct 2020 6:12 am (GMT +2) -

This quake was likely an aftershock of the 6.7 quake Aegean Sea, 17 km northeast of Karlovasi, Samos, North Aegean, Greece, 30 Oct 2020 1:51 pm (GMT +2), which had occurred 16 hours earlier.
Moderate mag. 3.9 earthquake - 83 km southwest of İzmir, Turkey, Greece, on Saturday, 31 Oct 2020 6:12 am (GMT +2)

Moderate magnitude 3.9 earthquake at 8 km depth

31 Oct 04:17 UTC: First to report: EMSC after 4 minutes.
31 Oct 04:19: Hypocenter depth recalculated from 2.0 to 5.0 km (from 1.2 to 3.1 mi). Epicenter location corrected by 2.1 km (1.3 mi) towards ENE.
31 Oct 04:24: Hypocenter depth recalculated from 5.0 to 10.0 km (from 3.1 to 6.2 mi). Epicenter location corrected by 4.5 km (2.8 mi) towards ENE.
31 Oct 06:26: Magnitude recalculated from 4.0 to 3.9. Hypocenter depth recalculated from 10.0 to 8.0 km (from 6.2 to 5 mi). Epicenter location corrected by 3.5 km (2.1 mi) towards NNE.
Date & time: 31 Oct 2020 04:12:56 UTC -
Local time at epicenter: Saturday, 31 Oct 2020 6:12 am (GMT +2)
Magnitude: 3.9
Depth: 8.0 km
Epicenter latitude / longitude: 37.89°N / 26.46°E (Aegean Sea, Greece)
Nearest volcano: Akyarlar (126 km / 78 mi)
Nearby towns and cities:
19 km (12 mi) NW of Ormos Agiou Isidorou (pop: 23) --> See nearby quakes!
24 km (15 mi) WNW of Karlovasi (pop: 6,710) --> See nearby quakes!
33 km (20 mi) WNW of Agios Konstantinos (pop: 368) --> See nearby quakes!
38 km (24 mi) NW of Spatharaioi (pop: 236) --> See nearby quakes!
43 km (27 mi) WNW of Mytilinioi (pop: 1,980) --> See nearby quakes!
48 km (30 mi) SW of Seferihisar (Turkey) (pop: 19,600) --> See nearby quakes!
50 km (31 mi) SSE of Çeşme (Turkey) (pop: 21,300) --> See nearby quakes!
55 km (34 mi) SSW of Urla (Turkey) (pop: 45,200) --> See nearby quakes!
55 km (34 mi) SSE of Thymiana (pop: 1,570) --> See nearby quakes!
240 km (149 mi) E of Athens (pop: 664,000) --> See nearby quakes!
68 km (42 mi) SSE of Chios Island (pop: 32,400) --> See nearby quakes!
147 km (91 mi) S of Lesvos Island (pop: 86,400) --> See nearby quakes!
65 km (40 mi) NW of Agathonisi Island (pop: 150) --> See nearby quakes!
Weather at epicenter at time of quake:
Few Clouds 16°C (61 F), humidity: 93%, wind: 10 m/s (19 kts) from NNE
Primary data source: EMSC (European-Mediterranean Seismological Centre)
Estimated released energy: 4.5 x 1010 joules (12.4 megawatt hours, equivalent to 10.7 tons of TNT) More info
Show interactive Map
[smaller] [bigger]
If you felt this quake (or if you were near the epicenter), please share your experience and submit a short "I felt it" report! Other users would love to hear about it!
Also if you did NOT feel the quake although you were in the area, please report it! Your contribution is valuable also to earthquake science and earthquake hazard analysis and mitigation efforts. You can use your device location or the map to indicate where you were during the earthquake. Thank you!

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.
M 3.98 kmDodecanese Islands, GreeceEMSC
M 3.65 kmAegean Sea, GreeceKOERI-RETMC

User reports for this quake (2)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Leave a comment if you find a particular report interesting or want to add to it.
Flag as inappropriate.
Mark as helpful or interesting.
Send your own user report!
Aigina / Very weak shaking (MMI II)
Aydın (Turkey, 122 km E of epicenter) : Uykudan uyandım. 06:50 (reported through EMSC)
Volcanoes & Earthquakes - new app for Android

Earlier earthquakes in the same area

Volcanoes & Earthquakes - new app for Android
Why is there advertising on this site?
Support us - Help us upgrade our services!
We truly love working to bring you the latest volcano and earthquake data from around the world. Maintaining our website and our free apps does require, however, considerable time and resources.
We need financing to increase hard- and software capacity as well as support our editor team. We're aiming to achieve uninterrupted service wherever an earthquake or volcano eruption unfolds, and your donations can make it happen! Every donation will be highly appreciated. If you find the information useful and would like to support our team in integrating further features, write great content, and in upgrading our soft- and hardware, please make a donation (PayPal or Online credit card payment).

Planned features:
  • Weather reports
  • Tsunami alerts
  • Design upgrades
  • Faster responsiveness
Thanks to your past donations, these features have been added recently:
  • Earthquake archive from 1900 onwards
  • Additional seismic data sources
  • Improved content in English
Download and Upgrade the Volcanoes & Earthquakes app to get one of the fastest seismic and volcano alerts online:
Android | IOS
Thank you!
Copyrights: VolcanoDiscovery and other sources as noted.
Use of material: Most texts and images, in particular photographs, on this website are protected by copyright. Further reproduction and use of without authorization is usually not consented. If you are not sure or need licensing rights for photographs, for example for publications and commercial use, please contact us.