- seismic moment
-
A quantity used to determine the the size of an earthquake. Calculated either from a seismogram, or from the measurement of the area affected and the displacement of the rocks.
Wikipedia foundation.
seismic moment
Look at other dictionaries:
Seismic moment — is a quantity used by earthquake seismologists to measure the size of an earthquake. The scalar seismic moment M 0 is defined by the equationM 0=mu Au, where *mu is the shear modulus of the rocks involved in the earthquake, typically 30… … Wikipedia
Moment — Moment(s) may refer to: Moment (time) Contents 1 Science, engineering, and mathematics 2 Art and entertainment … Wikipedia
Moment magnitude scale — Part of a series on earthquakes Types Foreshock • Aftershock • Blind thrust Doublet • Interplate • … Wikipedia
Seismic scale — A seismic scale is used to measure and compare the severity of earthquakes. (For a quick review, see the table of seismic scales at the end of this article.)Two fundamentally different but equally important types of scales are commonly used by… … Wikipedia
Seismic retrofit — Seismic retrofitting is the modification of existing structures to make them more resistant to seismic activity, ground motion, or soil failure due to earthquakes. Other retrofit techniques are applicable to areas subject to tropical cyclones,… … Wikipedia
New Madrid Seismic Zone — Coordinates: 36°34′57″N 89°35′17″W / 36.58245°N 89.58801°W / 36.58245; 89.58801 … Wikipedia
China Seismic Intensity Scale — The China Seismic Intensity Scale (CSIS) is a national standard in the People s Republic of China[1] used to measure seismic intensity. Similar to EMS 92 on which CSIS drew reference, seismic impacts are classified into 12 degrees of intensity,… … Wikipedia
Échelle de magnitude du moment — L échelle de magnitude du moment est une échelle logarithmique quantifiant la magnitude d un séisme. Elle fut introduite en 1979 par Thomas C. Hanks et Hiroo Kanamori pour succéder à l échelle de Richter[1]. La magnitude de moment ou de Kanamori … Wikipédia en Français
Earth Sciences — ▪ 2009 Introduction Geology and Geochemistry The theme of the 33rd International Geological Congress, which was held in Norway in August 2008, was “Earth System Science: Foundation for Sustainable Development.” It was attended by nearly… … Universalium
earthquake — /errth kwayk /, n. 1. a series of vibrations induced in the earth s crust by the abrupt rupture and rebound of rocks in which elastic strain has been slowly accumulating. 2. something that is severely disruptive; upheaval. [1300 50; ME erthequake … Universalium
