Memphis Area Regional Seismic Network. Final report, October 1986--September 1992
Technical Report
·
OSTI ID:10140675
- Memphis State Univ., TN (United States). Center for Earthquake Research and Information
The Memphis Area Regional Seismic Network (MARSN) has provided important southern coverage of the New Madrid seismic zone (NMSZ). One of the most important contributions of MARSN is to provide essential data for the successful identification of the Crittenden County fault zone which is located to the east and parallel to the south-west segment of the NMSZ. In addition to felt reports and earthquake locations, MARSN data has also been added into database obtained by the PANDA (Portable Array for Numerical Data Acquisition) experiment for a comprehensive seismological study of the NMSZ. Results from the PANDA experiment combined with regional seismic network data clearly demonstrate that the seismogenic zone in the NMSZ is mainly confined within depths ranging from 3 to 15 km. The SW, NW, and NE segments of the NMSZ are characterized by narrow vertical strike-slip faults. The central NMSZ is, however, very complicated. The northcentral NMSZ is characterized by a well-defined planar feature dipping {approximately} 31{degree} SW which shows dominantly normal faulting. The southcentral NMSZ is characterized by a {approximately} 48{degree} SW dipping fault which shows dominantly reverse faulting. Although the east-west compressional regional stress may play an important role in fault movements in the NMSZ, the complication in focal mechanism along each segment may suggest that other factors including postseismic relaxation by one or more of the 1811--1812 earthquakes, or the interactions between adjacent fault segments, or other tectonic features such as the right-lateral strike-slip Crittenden County Fault can not be overlooked in future tectonic studies of the NMSZ.
- Research Organization:
- Nuclear Regulatory Commission, Washington, DC (United States). Div. of Engineering; Memphis State Univ., TN (United States). Center for Earthquake Research and Information
- Sponsoring Organization:
- Nuclear Regulatory Commission, Washington, DC (United States)
- OSTI ID:
- 10140675
- Report Number(s):
- NUREG/CR--6209; ON: TI94009553; CNN: Contract NRC-04-86-120
- Country of Publication:
- United States
- Language:
- English
Similar Records
Bootheel lineament: A possible coseismic fault of the great New Madrid earthquakes
The Bootheel lineament, the 1811-1812 New Madrid earthquake sequence, and modern seismicity
Rapid intraplate strain accumulation in the New Madrid seismic zone
Journal Article
·
Tue Oct 01 00:00:00 EDT 1991
· Geology; (United States)
·
OSTI ID:5996619
The Bootheel lineament, the 1811-1812 New Madrid earthquake sequence, and modern seismicity
Conference
·
Tue Dec 31 23:00:00 EST 1991
· Geological Society of America, Abstracts with Programs; (United States)
·
OSTI ID:5935142
Rapid intraplate strain accumulation in the New Madrid seismic zone
Journal Article
·
Tue Sep 01 00:00:00 EDT 1992
· Science (Washington, D.C.); (United States)
·
OSTI ID:6819706