MEGAQUAKE MYTHS

摘要

Since the M9.1 Sumatra-Andaman earthquake struck on Boxing Day in 2004, another four earthquakes with magnitudes of 8.5 or greater have occurred on the planet, including the Tohoku, Japan, earthquake in 2011 (see diagram, below). This apparent spate has led some to wonder if earthquake frequency is increasing. Careful statistical analysis reveals that it is not.