Seismic Hazard Map
Magnitude 4.9 TONGA
Monday, May 07, 2012 at 06:46:58 UTC
Major Tectonic Boundaries: Subduction Zones -purple, Ridges -red and Transform Faults -green
Global Seismic Hazard Assessment Program -GSHAP
Preliminary Earthquake Report
U.S. Geological Survey, National Earthquake Information Center
World Data Center for Seismology, Denver