![]() Some of the aftershocks from large earthquakes are listed but are incomplete in many instances, especially for ones that occurred before seismic instruments were in univeral usage. The data shown in table 1 are estimates of the most accurate epicenter, magnitude, and intensity of each earthquake, on the basis of historical and current information. As recently as 1991, an earthquake with a magnitude. The Earthquake Event Page application supports most recent browsers, view supported browsers.Or, try our Real-time Notifications, Feeds, and Web Services. ![]() Some epicenters were relocated on the basis of new information. Some parts of Arkansas, Illinois, Missouri, Kentucky, and Tennessee are on a fault line called New Madrid. ![]() Intensity values were updated from new and additional data sources that were not available at the time of original compilation. Louis: this year: 2.5 in Imperial, Missouri, United States. These data have been reexamined which resulted in some revisions of epicenters and intensities as well as assignment of intensities to earthquakes that previously had none assigned. (KFVS) - A magnitude 2.3 earthquake was recorded in southeast Missouri on Tuesday afternoon, June 13. The earthquake data shown on this map and listed in table 1 are a list of earthquakes that were originally used in preparing the Seismic Risk Studies in the United States in the United States (Algermissen, 1969) which have been recompiled and updated through 1977.
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