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Note: The map shows an area with a shaking intensity of 4 or greater, which the USGS defines as “light,” although the earthquake may be felt outside the areas shown. The New York Times
A powerful 7.3-magnitude earthquake struck the Coral Sea on Tuesday, according to the United States Geological Survey.
The quake briefly triggered a tsunami warning for parts of Vanuatu, according to US Tsunami Warning Systemwhich is part of the National Weather Service. As of 2:14 p.m. local time, US officials said the threat had passed.
The quake struck at 12:47 a.m. Vanuatu time, about 29 miles west of Port-Vila, Vanuatu, the agency said.
USGS data previously reported that the magnitude was 7.4.
As seismologists review available data, they may revise the reported magnitude of the earthquake. Additional information gathered about the earthquake may also prompt USGS scientists to update the earthquake magnitude map.
Aftershocks in the region
An aftershock is usually a smaller earthquake that follows a larger one in the same general area. Aftershocks are usually smaller adjustments along the part of the fault that slipped at the time of 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 can continue to affect already damaged sites.
Source: United States Geological Survey | Notes: Shake categories are based on Modified Mercalli intensity measure. When aftershock data are available, the corresponding maps and diagrams include earthquakes within 100 miles and seven days of the initial earthquake. All times above are Vanuatu time. Earthquake data is as of Monday, December 16 at 9:01 PM Eastern. Aftershock data is as of Tuesday, December 17 at 11:48 a.m. Eastern.
