Seismic Hazard Map
Magnitude 4.8 TONGA
Thursday, May 19, 2011 at 06:23:03 UTC
Major Tectonic Boundaries: Subduction Zones -purple, Ridges -red and Transform Faults -green
Preliminary Earthquake Report
U.S. Geological Survey, National Earthquake Information Center
World Data Center for Seismology, Denver
