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" (Data Set). NOAA National Centers for Environmental Information. doi:10.7289/V5TD9V7K. Retrieved 10 June 2022.
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ngdc.noaa.gov
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" (Data Set). NOAA National Centers for Environmental Information. doi:10.7289/V5TD9V7K. Retrieved 10 June 2022.