It looks like you're using an Ad Blocker.
Please white-list or disable AboveTopSecret.com in your ad-blocking tool.
Thank you.
Some features of ATS will be disabled while you continue to use an ad-blocker.
Many recent earthquakes may have been the aftershocks of large quakes that occurred hundreds of years ago, according to scientists.
In the journal Nature, researchers described a new pattern in the frequency of aftershocks that could explain some major quakes.
They found that, away from plate boundaries, echoes of past earthquakes can continue for several hundred years.