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. Source: U.S.G.S. By William B. Davis and John Keefe
A major, 7.6-magnitude earthquake struck in the South Atlantic Ocean on Friday, according to the United States Geological Survey. The earthquake prompted alerts about potential tsunami along the coast of Chile on the western side of South America, but after a little over an hour, the authorities said dangerous waves were unlikely.
The U.S. National Tsunami Warning Centers in Alaska and Hawaii said there was no tsunami danger for Hawaii, or for the east and west coasts of Canada and the United States.
The temblor happened at 4:29 p.m. Eastern, 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. Shake data is as of Friday, Oct. 10 at 4:47 p.m. Eastern. Aftershocks data is as of Friday, Oct. 10 at 9:14 p.m. Eastern.
Maps: Daylight (urban areas); MapLibre (map rendering); Natural Earth (roads, labels, terrain); Protomaps (map tiles)
