Note: The map shows the area with a shaking intensity of 4 or greater, which USGS defines as “mild,” although the earthquake may be felt outside the areas shown. The New York Times
According to the United States Geological Survey, a massive 7.3 magnitude earthquake struck in the Coral Sea on Tuesday.
The quake triggered a tsunami risk for parts of Vanuatu, the statement said US tsunami warning systemwhich is part of the National Weather Service.
The quake struck at 12:47 p.m. Vanuatu time about 19 miles west of Port-Vila, Vanuatu, agency data shows.
USGS data previously reported the magnitude was 7.4.
As seismologists review the available data, they may revise the reported magnitude of the earthquake. Additional information gathered about the earthquake could also prompt USGS scientists to update the shaking severity map.
Aftershocks in the region
An aftershock is usually a smaller earthquake that follows a larger earthquake in the same area. Aftershocks are typically minor adjustments along the portion of a fault that was displaced at the time of the initial earthquake.
Earthquakes and aftershocks within 100 miles
Aftershocks can occur days, weeks or even years after the initial earthquake. These events may be of equal or greater magnitude than the original earthquake and may continue to impact already damaged sites.
Source: United States Geological Survey | Notes: Shake categories are based on Modified Mercalli intensity Scale. When aftershock data is available, corresponding maps and charts include earthquakes within 100 miles and seven days of the initial quake. All times above are based on Vanuatu time. Shake data as of Monday, December 16th at 9:01 p.m. Eastern Time. Aftershock data is as of Monday, December 16, 10:18 p.m. Eastern Time.
