Watch what a 6-magnitude earthquake does in China vs. the US(vox.com)
vox.com
Watch what a 6-magnitude earthquake does in China vs. the US
http://www.vox.com/2014/8/26/6069921/watch-what-a-6-magnitude-earthquake-does-in-china-vs-the-us
http://www.vox.com/2014/8/26/6069921/watch-what-a-6-magnitude-earthquake-does-in-china-vs-the-us
Their destructiveness can be increased by many factors, such as the type of ground that buildings are on and the depth of the earthquake.