Results 221 to 230 of about 117,803 (257)

Unbiased Estimation of Moment Magnitude from Body- and Surface-Wave Magnitudes

Bulletin of the Seismological Society of America, 2014
Abstract For regression of variables having measurement errors, general orthogonal regression (GOR) is the most appropriate statistical procedure that yields a linear relation between the true values of the dependent ( y t ) and independent ( x t ) variables.
R. Das, H. R. Wason, M. L. Sharma
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Moment Magnitude-Local Magnitude Calibration for Earthquakes in Western Canada

Bulletin of the Seismological Society of America, 2005
Local magnitude ( M L ) is the primary magnitude scale calculated for western Canada by the Geological Survey of Canada (gsc). Moment magnitude ( M w ), derived from moment tensor analysis, provides a more robust estimate of the magnitude of earthquakes but is more demanding to calculate.
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Empirical Relationship between Moment Magnitude and Nuttli Magnitude for Small-magnitude Earthquakes in Southeastern Canada

Seismological Research Letters, 2005
The most common catalog magnitude for eastern North America is the Nuttli magnitude (Nuttli, 1973), referred to as MN or MbLg . The Nuttli magnitude is based on the amplitude of the Lg phase (multiply reflected and refracted shear waves). MN is quickly and easily determined from the time series, making it convenient for routine catalog purposes.
E. Sonley, G. M. Atkinson
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Development of a Moment Magnitude Relation for Albania

Bulletin of the Seismological Society of America, 2002
The Albanian Seismological Network (ASN) has been operating 13 seismological stations since 1976. All these stations are equipped with short-period seismographs and analog-type drum recorders. The well-known Richter9s formula modified for our conditions has been used to report local magnitude.
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A SEISMIC MOMENT MAGNITUDE SCALE

Theaimofobtaininga single scale for earthquake magnitudes has led many studies in the past to either develop relationships among various existing scales or develop an altogether new scale to represent a wide range of magnitudes on a single scale.
Ranjit DAS Das, MUKAT SHARMA, HANS WASON, DEEPANKAR choudhury, Gabriel Gonzalez   +4 more
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On the magnitude of the local moment in the Anderson model

Solid State Communications, 1977
Abstract Consideration of the self-consistent coupling between transverse spin fluctuations and charge fluctuations at the impurity provides an understanding of the magnetic atom's susceptibility law which reduces to that appropriate for a spin one half only in the symmetric configuration at low temperatures.
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Comparison of Magnitude Estimates for New Zealand Earthquakes: Moment Magnitude, Local Magnitude, and Teleseismic Body-Wave Magnitude

Bulletin of the Seismological Society of America, 2009
New Zealand is one of the more seismically active countries in the world, with more than 15,000 earthquakes located each year. Routine moment tensor analysis of regional seismic data for earthquakes with moment magnitude M w>∼3.5–4.0 has recently been implemented in New Zealand. Nearly 330 regional moment tensor (RMT) solutions have been calculated for
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Empirical Calibration of Local Magnitude Data Sets Versus Moment Magnitude in Italy

Bulletin of the Seismological Society of America, 2013
Using general orthogonal regressions (GORs), we calibrated local magnitudes, estimated in Italy using various methods in different periods of time from 1981 to 2010, with a set of homogeneous moment magnitudes ( M w). Magnitude uncertainties, necessary for the application of GOR methods, are inferred by a trial‐and‐error procedure based on a priori ...
GASPERINI, PAOLO, LOLLI, BARBARA, G. Vannucci   +2 more
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A Correction to Body-wave Magnitude mb Based on Moment Magnitude Mw

Seismological Research Letters, 2003
Although body-wave magnitude mb (as well as surface-wave magnitude Ms ) is rapidly being supplanted by moment magnitude MW as the magnitude of record for moderate to large earthquakes, the first, automatically determined teleseismic estimate of earthquake size is still mb .
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A Note on the Ratio of the Moment Magnitude Scale to Other Magnitude Scales: Theory and Applications

Seismological Research Letters, 2016
ABSTRACT The relationship between the moment magnitude scale and other magnitude scales is a subject of continuing research ever since the moment magnitude ( M w ) was first proposed. Empirical results show that in western North America, the moment magnitude is greater than, equal to, and less than the Richter ( M L ) and Nuttli magnitudes ( m b Lg
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