National Geophysical Data Center / World Data Service (NGDC/WDS): NCEI/WDS Global Significant Earthquake Database. NOAA National Centers for Environmental Information (1972). «Significant Earthquake Information». NOAA National Centers for Environmental Information. doi:10.7289/V5TD9V7K. Consultado em 20 de agosto de 2010
National Geophysical Data Center / World Data Service (NGDC/WDS): NCEI/WDS Global Significant Earthquake Database. NOAA National Centers for Environmental Information (1972). «Significant Earthquake Information». NOAA National Centers for Environmental Information. doi:10.7289/V5TD9V7K. Consultado em 20 de agosto de 2010