But New Madrid has experienced some big quakes in its history. Researchers have geologic evidence of several major earthquakes of around magnitude 7 and 8 striking the area over the past 4,500 years. More recently, the region experienced a series of strong quakes in 1811 and 1812. The first occurred in Arkansas on December 16, 1811, and scientistsâ best estimate for its strength is that it was a magnitude-7.7 earthquake. Six hours later, the region shook again with a similar-sized aftershock.
Unallocated space, also called free space, is defined as the unused portion of the hard drive; file slack is the unused space that is created between the end-of-file marker and the end of the hard drive cluster in which the file is stored.
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