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This earthquake resulted in at least 1 death and left at least 185 injured. [14] Serious damage was caused. There was no tsunami. It is believed that this was an aftershock of the earthquake almost 10 years to the exact date of the 2011 mainshock. [15] 2021-03-20 18:09:45 M w 7.0 M JMA 6.9
The frequency of aftershocks decreases roughly with the reciprocal of time after the main shock. This empirical relation was first described by Fusakichi Omori in 1894 and is known as Omori's law. [1] It is expressed as = + where k and c are constants, which vary between earthquake sequences.
The USGS estimated that the earthquake could cause economic losses measuring between 1–10% of Vanuatu's GDP. [19] The United Nations Office for the Coordination of Humanitarian Affairs estimated that 116,000 people had been directly affected by the earthquake, [44] equivalent to a third of Vanuatu's population. [45] Among them were 14,000 ...
The USGS puts the chances of a New Jersey earthquake measuring 4.8 or higher in the next week at 1 in 200, or 0.5%. The odds go down to 0.3% for a quake 5 or above, 0.03% for 6 or above and 0.003% ...
Aftershocks continued Friday after a strong earthquake that prompted a tsunami warning for parts of the U.S. West Coast Thursday. "At this time, there have been 59 earthquakes of magnitude three ...
Aftershocks are possible in the following days, months or years after Friday's 4.8 magnitude earthquake, which was felt throughout parts of New York.
Tōhoku earthquake and aftershocks from 11 to 14 March Satellite image shows snowfall on agricultural fields in Sendai area. See § Weather conditions paragraph for details. Japan experienced over 1,000 aftershocks since the earthquake, with 80 registering over magnitude 6.0 M w and several of which have been over magnitude 7.0 M w.
The third aftershock cluster was in the Santa Susana Mountains after a M w 5.6 aftershock 11 hours after the mainshock. That event and its aftershocks were distributed along a 10 km (6.2 mi) strike and vertically within the crust, likely associated with faults that did not rupture during the mainshock. [11] [15]