aftershock

There have also been a steady stream of aftershocks.

The initial quake was followed by a number of large aftershocks, which are thought to have caused further deaths.

Russian experts had warned strong aftershocks were possible for several weeks after Wednesday's earthquake - which was one of the strongest ever recorded and saw millions of people evacuate.

A series of strong aftershocks have also been recorded.

Instead, the study argues, we should consider the ways the aftershocks of religious traditions, political systems and armed conflicts can influence the genetic structure of urban wildlife populations.