Note: Map shows the area with a shake intensity of 4 or greater, which U.S.G.S. defines as “light,” though the earthquake may be felt outside the areas shown. The New York Times
A strong, 6.2-magnitude earthquake struck in the Sea of Marmara on Wednesday, according to the United States Geological Survey.
The temblor happened at 12:49 p.m. Eastern European time about 13 miles southeast of Marmara Ereğlisi, Turkey, data from the agency shows.
As seismologists review available data, they may revise the earthquake’s reported magnitude. Additional information collected about the earthquake may also prompt U.S.G.S. scientists to update the shake-severity map.
Aftershocks in the region
An aftershock is usually a smaller earthquake that follows a larger one in the same general area. Aftershocks are typically minor adjustments along the portion of a fault that slipped at the time of the initial earthquake.
Quakes and aftershocks within 100 miles
Aftershocks can occur days, weeks or even years after the first earthquake. These events can be of equal or larger magnitude to the initial earthquake, and they can continue to affect already damaged locations.
When quakes and aftershocks occurred
Source: United States Geological Survey | Notes: Shaking categories are based on the Modified Mercalli Intensity scale. When aftershock data is available, the corresponding maps and charts include earthquakes within 100 miles and seven days of the initial quake. All times above are Eastern European time. Shake data is as of Wednesday, April 23 at 6:01 a.m. Eastern. Aftershocks data is as of Wednesday, April 23 at 9:04 a.m. Eastern.
Maps: Daylight (urban areas); MapLibre (map rendering); Natural Earth (roads, labels, terrain); Protomaps (map tiles)
https://www.nytimes.com/interactive/2025/04/23/world/europe/turkey-earthquake.html
