Sign in
Author

Conference

Journal

Organization

Year

DOI
Look for results that meet for the following criteria:
since
equal to
before
between
and
Search in all fields of study
Limit my searches in the following fields of study
Agriculture Science
Arts & Humanities
Biology
Chemistry
Computer Science
Economics & Business
Engineering
Environmental Sciences
Geosciences
Material Science
Mathematics
Medicine
Physics
Social Science
Multidisciplinary
Keywords
(2)
Southern California
Peak Ground Velocity
Related Publications
(1)
Regional Lg Attenuation for the Continental United States
Subscribe
Academic
Publications
The Richter scale: its development and use for determining earthquake source parameters
The Richter scale: its development and use for determining earthquake source parameters,10.1016/00401951(89)90200X,Tectonophysics,DAVID M. BOORE
Edit
The Richter scale: its development and use for determining earthquake source parameters
(
Citations: 9
)
BibTex

RIS

RefWorks
Download
DAVID M. BOORE
Boore, D.M.. 1989. The Richter scale: its development and use for determining earthquake source parameters. In: D. Denharn (Editor), Quantification of Earthquakes and the Determination of Source Parameters. Tectonophysics, 166: l14. The M, scale, introduced by Richter in 1935, is the antecedent of every magnitude scale in use today. The scale is defined such that a magnitude3 earthquake recorded on a WoodAnderson torsion seismometer at a distance of 100 km would write a record with a peak excursion of 1 mm. To be useful, some means are needed to correct recordings to the standard distance of 100 km. Richter provides a table of correction values, which he terms log A,,, the latest of which is contained in his 1958 textbook. A new analysis of over 9000 readings from almost 1000 earthquakes in the
southern California
region was recently completed to redetermine the log A, values. Although some systematic differences were found between this analysis and Richter's values (such that using Richter's values would lead to under and overestimates of ML at distances less than 40 km and greater than 200 km, respectively), the accuracy of his values is remarkable in view of the small number of data used in their determination. Richter's corrections for the distance attenuation of the peak amplitudes on WoodAnderson seismographs apply only to the
southern California
region, of course, and should not be used in other areas without first checking to make sure that they are applicable. Often in the past this has not been done, but recently a number of papers have been published determining the corrections for other areas. If there are significant differences in the attenuation within 100 km between regions, then the definition of the magnitude at 100 km could lead to difficulty in comparing the sixes of earthquakes in various parts of the world. To alleviate this, it is proposed that the scale be defined such that a magnitude 3 corresponds to 10 mm of motion at 17 km. This is consistent both with Richter's definition of M, at 100 km and with the newly determined distance corrections in the
southern California
region. Aside from the obvious (and original) use as a means of cataloguing earthquakes according to sire, M, has been used in predictions of ground shaking as a function of distance and magnitude; it has also been used in estimating energy and seismic moment. There is a good correlation of
peak ground velocity
and the peak motion on a WoodAnderson instrument at the same location, as well as an observationally defined (and theoretically predicted) nonlinear relation between M, and seismic moment. An important byproduct of the establishment of the ML scale is the continuous operation of the network of WoodAnderson seismographs on which the scale is based. The records from these instruments can be used to make relative comparisons of amplitudes and waveforms of recent and historic earthquakes; furthermore, because of the moderate gain, the instruments can write onscale records from great earthquakes at teleseismic distances and thus can provide important information about the energy radiated from such earthquakes at frequencies where many instru ments have saturated.
Journal:
Tectonophysics
, vol. 166, no. 13, pp. 114, 1989
DOI:
10.1016/00401951(89)90200X
Cumulative
Annual
View Publication
The following links allow you to view full publications. These links are maintained by other sources not affiliated with Microsoft Academic Search.
(
linkinghub.elsevier.com
)
(
adsabs.harvard.edu
)
(
quake.wr.usgs.gov
)
(
quake.usgs.gov
)
More »
Citation Context
(7)
...Charles Richter’s scale [
8
,27] for measuring earthquake magnitude is also logarithmic, and earthquake magnitude frequency follows an exponential distribution as well (see Fig. 1(c)‐(d))...
Michael T. Goodrich
,
et al.
Priority Range Trees
...Such a projection is generally referred to as magnitude calibration (e.g.,
Boore, 1989
)...
Antonella Bobbio
,
et al.
A Local Magnitude Scale for Southern Italy
...One is that regional differences in attenuation are known to exist (e.g.,
Boore 1989,
Benz et al. 1997), Figure 5. Combined amplification for T = 0.2 s and T = 3.0 s as function of pga4nl, for suite of VS30...
David M. Boorea
,
et al.
GroundMotion Prediction Equations for the Average Horizontal Componen...
...It has been suggested (Papazachos et al., 1997) and proved by Margaris and Papazachos (1999) that this difference is due to low static magnification (V∼1000) of the WoodAnderson instrument in Athens (NOA), which is much smaller than the effective static magnification of V∼2080 found for WA instruments (
Boore, 1989;
Uhrhammer and Collins, 1990)...
B. C. Papazachos
,
et al.
Uncertainties in the estimation of earthquake magnitudes in Greece
...(
Boore, 1987;
where A is amplitude, D is distance in km, and c is constant) through the log velocities by varying constant c in the equation until the mean difference between the log velocities and the curve is equal to zero...
Mark W. Stirling
,
et al.
Assessment of the Site Conditions of Precariously Balanced Rocks in th...
References
(10)
Stochastic Simulation of HighFrequency Ground Motions Based on Seismological Models of the Radiated
(
Citations: 214
)
D. M. Boore
SHORTPERIOD P AND SWAVE RADIATION FROM LARGE EARTHQUAKES: IMPLICATIONS FOR SPECTRAL SCALING RELATIONS
(
Citations: 40
)
DAVID M. BOORE
Published in 1986.
MomentMagnitude Relations in Theory and Practice
(
Citations: 52
)
Thomas C. Hanks
,
David M. Boore
Journal:
Journal of Geophysical Research
, vol. 89, no. B7, pp. 62296235, 1984
THE ML SCALE IN SOUTHERN CALIFORNIA
(
Citations: 45
)
L. K. HUTTON
,
DAVID M. BOORE
Published in 1987.
DETERMINATION OF LOCAL MAGNITUDE, ML, FROM STRONG MOTION ACCELEROGRAMS
(
Citations: 21
)
HIROO KANAMORI
,
PAUL C. JENNINGS
Published in 1978.
Sort by:
Citations
(9)
Priority Range Trees
Michael T. Goodrich
,
Darren Strash
Journal:
Computing Research Repository  CORR
, vol. abs/1009.3, pp. 97108, 2010
A Local Magnitude Scale for Southern Italy
(
Citations: 1
)
Antonella Bobbio
,
Maurizio Vassallo
,
Gaetano Festa
Journal:
Bulletin of The Seismological Society of America  BULL SEISMOL SOC AMER
, vol. 99, no. 4, pp. 24612470, 2009
GroundMotion Prediction Equations for the Average Horizontal Component of PGA, PGV, and 5%Damped PSA at Spectral Periods between 0.01 s and 10.0 s
(
Citations: 33
)
David M. Boorea
,
Gail M. Atkinson
Journal:
Earthquake Spectra  EARTHQ SPECTRA
, vol. 24, no. 1, 2008
Earthquake ground motion estimation using strongmotion records: A review of equations for the estimation of peak ground acceleration and response spectral ordinates
(
Citations: 102
)
J. Douglas
Journal:
Earthscience Reviews  EARTHSCI REV
, vol. 61, no. 1, pp. 43104, 2003
Uncertainties in the estimation of earthquake magnitudes in Greece
(
Citations: 9
)
B. C. Papazachos
,
V. G. Karakostas
,
A. A. Kiratzi
,
B. N. Margaris
,
C. B. Papazachos
,
E. M. Scordilis
Journal:
Journal of Seismology  J SEISMOL
, vol. 6, no. 4, pp. 557570, 2002