![]() Earthquake Hazards Map of the South Carolina Coastal Plain, GGMS-2. Sign up for the USGS Earthquake Notification Service to receive earthquake notifications by email or cell phone. nor to substitute for the standard of care required of such professionals in interpreting and applying the results of the seismic data provided by this. Click or tap on a circle to view more details about an earthquake, such as location, date/time, magnitude, and links to more information about the quake. Register your observations with the USGS. Report of the Independent Expert Panel on New Madrid Seismic Zone Earthquake Hazards (2011) (1. Real-Time Interactive Earthquake Map Legend Earthquakes are shown as circles sized by magnitude (red, ![]() Incorporated Research Institutes for Seismology (IRIS).Multidisciplinary Center for Earthquake Engineering Research - MCEER. Report of the Independent Expert Panel on New Madrid Seismic Zone Earthquake Hazards (2011) (1.8 MB PFD) Lamont-Doherty Cooperative Seismographic Network - LCSN.The geologic record of pre-1811 earthquakes reveals that the New Madrid seismic zone has repeatedly produced sequences of major earthquakes, including several of magnitude 7 to 8, over the past 4,500 years. Hundreds of aftershocks were felt in 1813. The first earthquake was followed by 6 aftershocks in the range M5.5-6.3 in the first 2 days. The 1811-1812 New Madrid sequence consisted of three large earthquakes: Community Internet Intensity Map Contributed by US 1 Origin Review Status REVIEWED Magnitude 5.0 mb Depth 10.0 km Time 00:38:52 UTC Contributed by US 1 View Nearby Seismicity Time Range Three Weeks Search Radius 250.0 km Magnitude Range 2.0 ANSS Comcat For More Information. Larger earthquakes are represented by larger circles. The red polygon is the reporting region for this map the black polygon is the authoritative region of the PNSN. Green circles denote earthquakes that occurred prior to 1974 (USGS Professional Paper 1527). Red circles indicate earthquakes that occurred from 1974 to 2002 with magnitudes larger than 2.5 located using modern instruments (University of Memphis). This map shows earthquakes (circles) of the New Madrid and Wabash Valley seismic zones (orange patches).
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