Information on the earthquake: moderate mag. Earthquake 4.2 – Aegean Sea, 46 km south of Kos, Dodecanese, South Aegean, Greece, on Thursday, September 30, 2021 at 01:22 (GMT +3)
29 Sep 22:25 UTC: First to report: EMSC after 2 minutes.
Sep 29 22:26: Now using NOA data updates
September 29 23:11: Depth of the hypocenter recalculated from 9.9 to 4.9 km (from 6.2 to 3 mi). Epicenter location corrected 2.1 km (1.3 mi) towards SSW.
The event was classified by the Athens National Observatory (NOA), the first seismological agency to report it.
Our monitoring service identified a second report from the Kandilli Observatory and the Istanbul Earthquake Research Institute (KOERI-RETMC) that listed the earthquake at a magnitude of 4.3. Other agencies reporting the same earthquake include the Euro-Mediterranean Seismological Center (EMSC) of magnitude 4.3 and the German Research Center for Geosciences (GFZ) of magnitude 4.2.
Based on preliminary seismic data, the quake was likely felt by many people in the epicenter area. It should not have caused any significant damage, other than objects falling from shelves, broken glass, etc.
In Nikia (48 inhabitants) located 10 km from the epicenter, the earthquake should have been felt as slight tremors.
Weak tremors could have been felt in Kardamena (1,900 inhabitants) located 33 km from the epicenter, Kefalos (2,500 inhabitants) 36 km, Antimacheia (2,300 inhabitants) 37 km, Kos (19,200 inhabitants) 45 km, and Kalymnos (12,300 inhabitants) 55 km.
Other towns close to the epicenter where the earthquake could have been felt as very weak tremors include Turgutreis (16,500 inhabitants) located 59 km from the epicenter, Bodrum (39,300 inhabitants) 64 km away and Rhodes (56 km). 100 inhabitants) 90 km.
VolcanoDiscovery will automatically update the magnitude and depth if these change and follow up if other significant earthquake news becomes available. If you are in the region, please share your experience with us through our reporting mechanism, online or through our mobile app. This will help us provide more first-hand updates to anyone in the world who is interested in learning more about this earthquake.