I think you may be referring to aftershocks. Aftershocks are smaller tremors that can occur at any time for months after an earthquake as the pressure within Earth's crust is gradually released.
aftershock
In any series of earthquakes in the same area, the one with the largest magnitude is called the mainshock. Anything before this is called a foreshock and anything after is called an aftershock.
Aftershock
They have happened twice in the past weeks One of them was on January 12th, 2010, and the other was an aftershock a couple days after. it was so strong, that they decided to call it an aftershock.
Aftershock Aftershock
Aftershock is a noun.
It is basically called an aftershock, or a tremor.
Aftershock - band - ended in 2004.
Aftershock - band - was created in 1992.
WWE Aftershock happened in 2005.
They are bracing for the aftershock.The aftershock provided the nudge the building needed to completely collapse.
Long Beach Aftershock was created in 2002.
Los Angeles Aftershock was created in 2003.
Letters - Aftershock album - was created in 1997.
WWE Aftershock was created on 2005-07-11.
the size of the aftershock in Alaska is about 6.3 magnitude long