Note: Map shows area with shaking magnitude 3 or greater, which the USGS defines as “weak”, although earthquakes may be felt outside the areas shown. the new York Times
A massive 7.4-magnitude earthquake struck off the northeastern coast of Japan on Monday, according to the United States Geological Survey.
The quake occurred at 3:53 a.m. about 62 miles northeast of Miyako, Japan, agency data shows.
As seismologists review available data, they may revise the reported intensity of an earthquake. Additional information collected about earthquakes may also lead USGS scientists to update the earthquake-severity map.
Source: United States Geological Survey | Notes: The categories of shocks are based on modified mercalli intensity scale. When aftershock data is available, related maps and charts include earthquakes within 100 miles and seven days of the initial earthquake. All times above are Eastern. Shake data as of Monday, April 20 at 4:11 AM Eastern. Aftershock data is as of Monday, April 20 at 4:24 AM Eastern.
