Megacity Megaquakes-- Two Near Misses.

The article discusses geophysics research that showed the seismicity patterns following the Maule earthquake on February 27, 2010 in Chile and the Sendai earthquake on March 11, 2011 in Japan suggests that earthquake hazards can rise sharply in areas far beyond the mainshock rupture zone. Topics include the rate at which small earthquake aftershocks increased beneath Tokyo, Japan and Santiago, Chile, global seismic hazard modeling, and some limitations of global seismic hazard modeling.