Alternative Title
Paper No. 3.22
Location
St. Louis, Missouri
Date
11 Mar 1998, 1:30 pm - 4:00 pm
Abstract
Morphoseismic features arc new landforms produced by earthquakes or pre-existing landforms modified by them. The New Madrid Seismic Zone (NMSZ) contains thousands of earthquake-related surface features distributed over 13,000 square kilometers. They are attributable to some combination of (1) seismically-induced liquefaction, (2) secondary deformation, and (3) seismically-induced slope failures. Most were produced by the series of great earthquakes that occurred in 1811-12, but some predate and some postdate those events. They are being modified by ongoing activities such a fluvial processes, mass wasting, eolian processes, hydrologically-induced liquefaction (HIL), mechanically-induced liquefaction (MJL), and human activities.
Dynamic responses to ground motion include sand extrusion, sand intrusion, lateral spreading, faulting, subsidence, uplift, stream modification, landsliding, groundwater flooding, and explosion cratering. We have identified thirty-four types of morphoseismic features. While the formation of these features during and following earthquakes can be devastating to engineering structures in place at the time of the ground motion, they pose unique hazards to structures built over them for all subsequent time. Geotechnical engineers working in the NMSZ, or any other region where large earthquakes occur, need to recognize and compensate for them.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
4th Conference of the International Conference on Case Histories in Geotechnical Engineering
Publisher
University of Missouri--Rolla
Document Version
Final Version
Rights
© 1998 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
Knox, Ray and Stewart, David, "Morphoseismic Features in the New Madrid Seismic Zone (central USA) and their Implications for Geotechnical Engineering" (1998). International Conference on Case Histories in Geotechnical Engineering. 6.
https://scholarsmine.mst.edu/icchge/4icchge/4icchge-session03/6
Morphoseismic Features in the New Madrid Seismic Zone (central USA) and their Implications for Geotechnical Engineering
St. Louis, Missouri
Morphoseismic features arc new landforms produced by earthquakes or pre-existing landforms modified by them. The New Madrid Seismic Zone (NMSZ) contains thousands of earthquake-related surface features distributed over 13,000 square kilometers. They are attributable to some combination of (1) seismically-induced liquefaction, (2) secondary deformation, and (3) seismically-induced slope failures. Most were produced by the series of great earthquakes that occurred in 1811-12, but some predate and some postdate those events. They are being modified by ongoing activities such a fluvial processes, mass wasting, eolian processes, hydrologically-induced liquefaction (HIL), mechanically-induced liquefaction (MJL), and human activities.
Dynamic responses to ground motion include sand extrusion, sand intrusion, lateral spreading, faulting, subsidence, uplift, stream modification, landsliding, groundwater flooding, and explosion cratering. We have identified thirty-four types of morphoseismic features. While the formation of these features during and following earthquakes can be devastating to engineering structures in place at the time of the ground motion, they pose unique hazards to structures built over them for all subsequent time. Geotechnical engineers working in the NMSZ, or any other region where large earthquakes occur, need to recognize and compensate for them.
