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Charles Francis Richter (/ ˈ r ɪ k t ər /; April 26, 1900 – September 30, 1985) was an American seismologist and physicist.He is the namesake and one of the creators of the Richter magnitude scale, which, until the development of the moment magnitude scale in 1979, was widely used to quantify the size of earthquakes.
Second, Richter arbitrarily defined the zero point of the scale to be where an earthquake at a distance of 100 km makes a maximum horizontal displacement of 0.001 millimeters (1 μm, or 0.00004 in.) on a seismogram recorded with a Wood-Anderson torsion seismograph. [14]
The Wood–Neumann scale was revised in 1956 by Charles Francis Richter and published in his influential textbook Elementary Seismology. [11] Not wanting to have this intensity scale confused with the Richter magnitude scale he had developed, he proposed calling it the "modified Mercalli scale of 1956" (MM56). [8]
A simple seismometer, sensitive to up-down motions of the Earth, is like a weight hanging from a spring, both suspended from a frame that moves along with any motion detected. The relative motion between the weight (called the mass) and the frame provides a measurement of the vertical ground motion. A rotating drum is attached to the frame and ...
Earthquake Game. The Earthquake Game was a college football game in which the crowd reaction after an important play registered on a seismograph. [ 1] Played in front of a crowd of 79,431 at Louisiana State University 's Tiger Stadium on October 8, 1988, the LSU Tigers upset No. 4 Auburn 7–6. [ 2][ 3]
The moment magnitude scale ( MMS; denoted explicitly with M or Mw or Mwg, and generally implied with use of a single M for magnitude [ 1]) is a measure of an earthquake 's magnitude ("size" or strength) based on its seismic moment. Mw was defined in a 1979 paper by Thomas C. Hanks and Hiroo Kanamori.
Earthquake prediction is a branch of the science of seismology concerned with the specification of the time, location, and magnitude of future earthquakes within stated limits, [ 1][ a] and particularly "the determination of parameters for the next strong earthquake to occur in a region". [ 2] Earthquake prediction is sometimes distinguished ...
The Richter scale[ 1] ( / ˈrɪktər / ), also called the Richter magnitude scale, Richter's magnitude scale, and the Gutenberg–Richter scale, [ 2] is a measure of the strength of earthquakes, developed by Charles Richter in collaboration with Beno Gutenberg, and presented in Richter's landmark 1935 paper, where he called it the "magnitude ...
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