Location
St. Louis, Missouri
Presentation Date
14 Mar 1991, 10:30 am - 12:30 pm
Abstract
The observations of liquefaction during the Cachar earthquake of N.E. India in December 31, 1984 (M=5.6) and the Great Nicobar earthquake of January 20, 1982 (M=6.3) have been reported. These observation, at short epicentral distances where duration of sustained motion was insufficient to postulate induced dynamic increase in pore water pressure, have been explained as quick-sand phenomena due to disturbance of soil structure under the influence of impulsive force associated with rupture at source. The proposed physical mechanism also explains well the bending of ceiling fan blades in Cachar earthquake and upthrow of objects during earthquakes in general. The discussion presented is expected to widen the scope of the explanation for ground failure, i.e., liquefaction in epicentral region particularly during moderate and shallow earthquake.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
2nd International Conference on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Publisher
University of Missouri--Rolla
Document Version
Final Version
Rights
© 1991 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
Agrawal, Pramod N., "Liquefaction During Two Moderate-Recent Earthquakes in India" (1991). International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics. 30.
https://scholarsmine.mst.edu/icrageesd/02icrageesd/session03/30
Included in
Liquefaction During Two Moderate-Recent Earthquakes in India
St. Louis, Missouri
The observations of liquefaction during the Cachar earthquake of N.E. India in December 31, 1984 (M=5.6) and the Great Nicobar earthquake of January 20, 1982 (M=6.3) have been reported. These observation, at short epicentral distances where duration of sustained motion was insufficient to postulate induced dynamic increase in pore water pressure, have been explained as quick-sand phenomena due to disturbance of soil structure under the influence of impulsive force associated with rupture at source. The proposed physical mechanism also explains well the bending of ceiling fan blades in Cachar earthquake and upthrow of objects during earthquakes in general. The discussion presented is expected to widen the scope of the explanation for ground failure, i.e., liquefaction in epicentral region particularly during moderate and shallow earthquake.
