New discoveries, from more recent research, has extended this "Crack" anomaly in where it combines with a MegaShear zone to the middle of Washington State and possibly with the Olympic-Wallowa Lineament (OWL) - which reaches to the Pacific Ocean near Port Angeles Washington. The results revealed an astonishing ancient rift in the North American crust that extends some 1,700 miles from Idaho to the southern Appalachian Mountains. Louis used data processing techniques where 600,000 discrete gravity measurements, from 20 years of scientific data gathering, to synthesize a map. The original 1,700 mile "Crack Across America" was found using modern day gravity mapping satellite data, and using computers, to process the measurements. Recently, and less known, is a study from an independent geologic research set of work, that has identified a possible second "Crack Through America" that crosses into and through the same volatile New Madrid Seismic Zone. Scientists have been struggling, since then, to answer the question of what risk this mega feature may pose to our heartland today. Worse yet, this crack cuts through the New Madrid Seismic Zone, where in 18 three giant earthquakes devastatingly struck the center of America. LOS ANGELES, CA (California Network) - In Nov 1981, a study was published that rocked the scientific world, and sparked concern in FEMA circles, in which a 1,700 mile "Crack Across America" was discovered. Keywords: crack, across, America, megaquake, New Madrid, Yellowstone
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