Note: The map shows the area with a shaking intensity of 4 or greater, which the USGS defines as “mild,” although the earthquake may be felt outside the areas shown. The New York Times
Two strong earthquakes were part of a series of tremors that shook Taiwan’s east coast Tuesday morning local time. No injuries or deaths had been reported as of Tuesday morning.
The quakes damaged buildings in an area hit by a larger quake that killed 17 people earlier this month and were considered aftershocks of the previous quake, authorities said.
National agencies often report different intensities for an earthquake. Taiwanese authorities reported that Tuesday’s largest quake was a magnitude 6.3, while the U.S. Geological Survey said its magnitude was 6.1.
As seismologists review available data, they may revise the reported magnitude of earthquakes. Additional information collected about the earthquake could also prompt USGS scientists to update the shaking severity maps.
Aftershocks in the region
An aftershock is usually a smaller earthquake that follows a larger earthquake in the same general area. Aftershocks are usually minor adjustments along the part of a fault that slipped during the initial earthquake.
Earthquakes and aftershocks within 100 miles
Aftershocks can occur days, weeks, or even years after the first earthquake. These events can be of equal or greater magnitude than the initial earthquake, and they can continue to affect already damaged sites.
Source: United States Geological Survey | Notes: Agitation categories are based on the Modified Mercalli Intensity Scale. When aftershock data is available, corresponding maps and diagrams include earthquakes within 100 miles and seven days after the initial earthquake. All times above are for Taipei. Shake data is as of Monday, April 22 at 2:46 p.m. Eastern Time. Aftershock data is as of Tuesday, April 23 at 9:42 a.m. Eastern Time.
News Source : www.nytimes.com
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