Journal ArticleDOI
A moment magnitude scale
Thomas C. Hanks,Hiroo Kanamori +1 more
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The nearly coincident forms of the relations between seismic moment M_0 and the magnitudes M_L, M_S, and M_w imply a moment magnitude scale M = ⅔ log M_ 0 - 10.7 as mentioned in this paper.Abstract:
The nearly coincident forms of the relations between seismic moment M_0 and the magnitudes M_L, M_S, and M_w imply a moment magnitude scale M = ⅔ log M_0 - 10.7 which is uniformly valid for 3 ≲ M_L ≲ 7, 5 ≲ M_s ≲ 7½, and M_w ≳ 7½.read more
Citations
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Journal ArticleDOI
New Empirical Relationships among Magnitude, Rupture Length, Rupture Width, Rupture Area, and Surface Displacement
TL;DR: In this article, a series of empirical relationships among moment magnitude (M ), surface rupture length, subsurface rupture length and downdip rupture width, and average surface displacement per event are developed.
Book
The Mechanics of Earthquakes and Faulting
TL;DR: The connection between faults and the seismicity generated is governed by the rate and state dependent friction laws -producing distinctive seismic styles of faulting and a gamut of earthquake phenomena including aftershocks, afterslip, earthquake triggering, and slow slip events.
Journal ArticleDOI
Stochastic simulation of high-frequency ground motions based on seismological models of the radiated spectra
TL;DR: In this article, the authors proposed a frequency-domain scaling model for predicting seismic motions as a function of source strength, which can be applied to any time series having a stochastic character, including ground acceleration, velocity and the oscillator outputs on which response spectra and magnitude are based.
Book ChapterDOI
Simulation of Ground Motion Using the Stochastic Method
TL;DR: One of the essential characteristics of the method is that it distills what is known about the various factors affecting ground motions into simple functional forms that can be incorporated into practical predictions of ground motion.
OtherDOI
Peak horizontal acceleration and velocity from strong motion records including records from the 1979 Imperial Valley, California, earthquake
TL;DR: In this paper, a magnitude-independent shape based on geometrical spreading and anelastic attenuation was proposed for the attenuation curve, which decouples the determination of the distance dependence of the data from the magnitude dependence.
References
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Journal ArticleDOI
Theoretical basis of some empirical relations in seismology
Hiroo Kanamori,Don L. Anderson +1 more
TL;DR: In this article, an empirical relation involving seismic moment M, energy E, magnitude M, and fault dimension L (or area S) is discussed on the basis of an extensive set of earthquake data (M_S ≧ 6) and simple crack and dynamic dislocation models.
Journal ArticleDOI
The energy release in great earthquakes
TL;DR: In this paper, a new magnitude scale M_w is defined in terms of W_0 through the standard energy-magnitude relation log W_ 0 = 1.5M_w + 11.8.
Journal ArticleDOI
Magnitude and energy of earthquakes
TL;DR: In this article, the relation of earthquake magnitude M to energy E (in ergs) was investigated and three different magnitude scales were proposed: M_L, the magnitude originally defined by Richter for local earthquakes in California as recorded on standard torsion seismometers, M_S, based on calculated ground amplitudes for surface waves of periods of about 20 sec. in shallow teleseisms, and M_B, that based on the amplitude/period ratio in body waves for both shallow and deep earthquakes.
Book
Seismicity Of The Earth
TL;DR: In this article, the relative seismicity of various parts of the earth during the limited period for which accurate information is available, and identify and discuss the geographical and geological relationships of the principal zones and areas of seismic activity.
Journal ArticleDOI
Source parameters of southern California earthquakes
Wayne Thatcher,Thomas C. Hanks +1 more
TL;DR: In this paper, a theoretical relation between magnitude-moment relation and source parameters was developed by using Brune's source model and the displacement response of the Wood-Anderson seismograph, and the result was used to construct the following relations: log M0 = 2.2 − log Δσ, where Δσ is in bars, and log 2r = ⅔ ML + 2.9 − Δσ.