Location
St. Louis, Missouri
Presentation Date
01 May 1981, 1:00 pm - 2:30 pm
Abstract
For an earthquake of magnitude 7.0 or larger, different published relations between magnitude, M, and epicentral intensity, I0, yield I0 values which may differ from each other by as much as one intensity unit or more. This implies an uncertainty of a factor of about 2 in the estimation of maximum ground acceleration. New empirical relations between M and I0 are derived using the revised estimates of I0 for several earthquakes. Suitability of some of the commonly used M - I0 relations for the estimation of maximum ground acceleration is examined by deriving acceleration-distance curves for different magnitude earthquakes (viz., 5.6, 6.6 and 7.6), using an intensity attenuation relation for the San Andreas attenuation province. The intensity to acceleration conversion is accomplished by using the relation published by Trifunac and Brady (1975). These acceleration-distance curves are compared with several recent acceleration attenuation studies for the western United States. It is found that the use of M - I0 relation derived in this study yields satisfactory acceleration-distance curves for different magnitudes.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
1st International Conference on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Publisher
University of Missouri--Rolla
Document Version
Final Version
Rights
© 1981 University of Missouri--Rolla, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Chandra, U., "Different Magnitude-Epicentral Intensity Relations and Estimation of Maximum Ground Acceleration" (1981). International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics. 3.
https://scholarsmine.mst.edu/icrageesd/01icrageesd/session09/3
Included in
Different Magnitude-Epicentral Intensity Relations and Estimation of Maximum Ground Acceleration
St. Louis, Missouri
For an earthquake of magnitude 7.0 or larger, different published relations between magnitude, M, and epicentral intensity, I0, yield I0 values which may differ from each other by as much as one intensity unit or more. This implies an uncertainty of a factor of about 2 in the estimation of maximum ground acceleration. New empirical relations between M and I0 are derived using the revised estimates of I0 for several earthquakes. Suitability of some of the commonly used M - I0 relations for the estimation of maximum ground acceleration is examined by deriving acceleration-distance curves for different magnitude earthquakes (viz., 5.6, 6.6 and 7.6), using an intensity attenuation relation for the San Andreas attenuation province. The intensity to acceleration conversion is accomplished by using the relation published by Trifunac and Brady (1975). These acceleration-distance curves are compared with several recent acceleration attenuation studies for the western United States. It is found that the use of M - I0 relation derived in this study yields satisfactory acceleration-distance curves for different magnitudes.
