What is an aftershock?
Every aftershock terrifies .
The largest so far was a 6.9 magnitude aftershock.
Applegate said, the magnitude 8.9 quake was an aftershock.
An aftershock of the same magnitude struck the region Sunday.
It is rare, though not unheard of, to have an earthquake followed by a larger aftershock.
Even now, as I write these words, the hotel is swaying from yet another aftershock.
A powerful aftershock occurred at 01:15 local time Tuesday (2315 GMT Monday).
The Sichuan Seismological Bureau warned residents that a strong aftershock was likely to happen in the province, Xinhua reported.
Even people whose homes remained whole chose to sleep outside, lest they be caught in another aftershock.
The United States Geological Survey said Tuesday's initial 6.3-magnitude quake was followed by various aftershocks, and itself was part of an aftershock sequence from last September's quake.
Japan was rattled by a strong aftershock and tsunami warning Thursday night nearly a month after a devastating earthquake and tsunami flattened the northeastern coast.
On Monday morning, an aftershock with a magnitude of 6.5 off the coast of northeast Honshu triggered a tsunami alert, which was later canceled.
Meanwhile, a strongly felt aftershock shook Haiti's capital of Port-au-Prince early Sunday, bringing the total number of aftershocks above 5.0 magnitude to 14, according to Xinhua.
2Elementary school children crouched under their desks at their school in Onagawa, Miyagi prefecture, on April 12, 2011, as a powerful aftershock hit northern Japan.
"No death has been reported so far, but many ramshackle houses in the town seat collapsed in the aftershock," said Zhu Lin, an official in Bikou town of Wenxian County.
The USGS characterized the 6.3-magnitude quake on February 22 as an aftershock of the quake that struck to the west, in Darfield, New Zealand, on September 3, 2010.
