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Samos / Very weak shaking (MMI II) / very short
Kokkari / Light shaking (MMI IV) / single lateral shake / very short
Light mag. 3.3 earthquake - Aegean Sea, Greece, 30 km west of Kusadasi, Aydın, Turkey, on Friday, April 23, 2021 at 17:10 GMT -
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Light magnitude 3.3 earthquake at 8 km depth
23 Apr 17:13 UTC: First to report: EMSC after 3 minutes.
23 Apr 17:17: Epicenter location corrected by 1.4 km (0.9 mi) towards SE.
23 Apr 17:17: Now using data updates from NOA
23 Apr 17:27: Magnitude recalculated from 3.0 to 3.3. Hypocenter depth recalculated from 10.0 to 7.8 km (from 6.2 to 4.8 mi). Epicenter location corrected by 4.3 km (2.7 mi) towards ENE.
23 Apr 17:17: Epicenter location corrected by 1.4 km (0.9 mi) towards SE.
23 Apr 17:17: Now using data updates from NOA
23 Apr 17:27: Magnitude recalculated from 3.0 to 3.3. Hypocenter depth recalculated from 10.0 to 7.8 km (from 6.2 to 4.8 mi). Epicenter location corrected by 4.3 km (2.7 mi) towards ENE.
Earthquake details
| Date & time | Apr 23, 2021 17:10:32 UTC - |
| Local time at epicenter | |
| Status | Confirmed |
| Magnitude | 3.3 |
| Depth | 7.8 km |
| Epicenter latitude / longitude | 37.8195°N / 26.9247°E  (Aegean Sea, Greece) |
| Antipode | 37.82°S / 153.075°W |
| Shaking intensity | Weak shaking |
| Felt | 2 reports |
| Primary data source | NOA (National Observatory of Athens) |
| Nearest volcano | Akyarlar (99 km / 62 mi) |
| Nearby towns and cities | 5 km (3 mi) NNE of Kokkari (pop: 1,060) | Show on map | Quakes nearby 14 km (9 mi) N of Pythagorion (pop: 1,270) | Show on map | Quakes nearby 20 km (12 mi) E of Karlovassi (pop: 6,710) | Show on map | Quakes nearby 28 km (18 mi) SW of Özdere (Turkey) (pop: 13,500) | Show on map | Quakes nearby 30 km (18 mi) W of Kusadasi (Turkey) (pop: 63,200) | Show on map | Quakes nearby 34 km (21 mi) WNW of Davutlar (Turkey) (pop: 9,480) | Show on map | Quakes nearby 42 km (26 mi) WSW of Selcuk (Turkey) (pop: 29,100) | Show on map | Quakes nearby 48 km (30 mi) NW of Sarıkemer (Turkey) (pop: 2,700) | Show on map | Quakes nearby 53 km (33 mi) SW of Torbalı (Turkey) (pop: 50,300) | Show on map | Quakes nearby 281 km (175 mi) E of Athens (pop: 664,000) | Show on map | Quakes nearby 40 km (25 mi) N of Agathonisi Island (pop: 150) | Show on map | Quakes nearby |
| Estimated seismic energy released | 5.6 x 109 joules (1.56 megawatt hours, equivalent to 1.34 tons of TNT) | about seismic energy |
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.
| Mag. | Depth | Location | Source |
| 3.3 | 7.8 km | 7 Km NE From Samos, Greece | NOA |
| 3.2 | 11 km | DODECANESE ISLANDS, GREECE | EMSC |
| 3.4 | 12 km | SISAM ADASI (AEGEAN SEA), Greece | KOERI-RETMC |
User reports for this quake (2)
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Earlier earthquakes in the same area
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