Why Have 20th Century Earthquakes in Turkey Suggested That Some

Multiple Choice

Why have 20th century earthquakes in Turkey suggested that some earthquakes beget subsequent earthquakes?

A) Two of the earthquakes were particularly strong.
B) Shoddy building construction in the most recent led to many deaths.
C) Prior to the Izmit earthquake in 1999, there had been no major quakes in more than 200 years.
D) Earthquakes have occurred in a pattern from east to west.