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Pressure on the fault where the 1811–1812 New Madrid earthquakes occurred was believed to be increasing, [23] but a later study by Eric Calais of Purdue University and other experts concluded the land adjacent to the New Madrid fault was moving less than 0.2 mm (0.0079 in) a year, increasing the span between expected earthquakes on the fault ...
The USGS issued a fact sheet in 2009 stating the estimate of a 7–10% chance of a New Madrid earthquake of magnitude comparable to one of the 1811–12 quakes within the next 50 years, and a 25–40% chance of a magnitude 6 earthquake in the same time frame. [32] In July 2014, the USGS increased the risk assessment for the New Madrid area. [33]
"The strongest earthquakes in the last few years have come from the Wabash Valley Fault, which needs more investigation." [4] Numerical modeling indicates that stress transfer following the 1811–1812 New Madrid earthquakes may be loading faults in the Wabash Zone. [6] Notable modern earthquakes in this zone include: June 10, 1987, magnitude 5.0
A magnitude 5 earthquake may affect 5-15 times larger of an area in the New Madrid Seismic Zone compared to California, largely due to the crustal geology of the two areas.
1811–1812 New Madrid earthquakes; Geology of Illinois; Illinois Basin; New Madrid seismic zone; Sandwich Fault Zone; ... Miscellaneous Field Studies Map 1143 ...
Nearly 75% of the country is at risk for a potentially damaging earthquake in the next 100 years, according to a recently updated map from the U.S. Geological Survey. The map is the first to ...
“Instead of allowing this event to scare you, use this real world event to help you review and update your family emergency plan,” public safety official said.
New Madrid fault and earthquake-prone region considered at high risk today. The 1811–1812 New Madrid earthquakes were a series of intense intraplate earthquakes beginning with an initial earthquake of moment magnitude 7.2–8.2 on December 16, 1811, followed by a moment magnitude 7.4 aftershock on the same day. Two additional earthquakes of ...