Note: Map shows the area with a shake intensity of 3 or greater, which U.S.G.S. defines as “weak,” though the earthquake may be felt outside the areas shown. The New York Times
A major, 7.4-magnitude earthquake struck off the northeast coast of Japan on Monday, according to the United States Geological Survey.
The temblor happened at 3:53 a.m. Eastern about 62 miles northeast of Miyako, Japan, 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.
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 Monday, April 20 at 4:11 a.m. Eastern. Aftershocks data is as of Monday, April 20 at 4:37 a.m. Eastern.

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