Japan earthquake: magnitude 6.7 aftershock rocks Honshu
Japan earthquake: The magnitude 6.7 quake is the 75th aftershock of at least magnitude 6.0 following the devastating March earthquake in Japan.
A magnitude 6.7 earthquake rocked Japan today, the 75th aftershock of at least magnitude 6.0 from the devastating magnitude 9.0 quake on March 11, according to the U.S. Geological Survey (USGS). The earthquake data is preliminary and subject to revision.
Japan has been rocked by hundreds of aftershocks since the deadly Tohoku earthquake, the biggest in Japan's recorded history. The aftershocks have been so plentiful that the world's premier earthquake-measurement service has since modified its alert system to filter out the smaller aftershocks. The largest aftershock was a magnitude 7.9 quake that struck less than an hour after the main shock. A magnitude 7.7 also struck that day. A magnitude 7.1 aftershock struck on April 7. [When Will the Aftershocks in Japan End?]
The number of aftershocks seems staggering, but geologists are not surprised, especially for such large mainshock.
