Date of Award
Master of Science
Steve P Horton
The April 18, 2008 (5.4 Mw) Mt. Carmel, Illinois earthquake is the largest event in the central United States in the previous 40 years. Approximately 180 aftershocks (0.8 to 4.6) were located using a combination of regional network stations and temporary broadband seismometers deployed in the epicentral area by the University of Memphis and Indiana University. To help constrain earthquake source mechanism, the orientation of faults and the tectonic processes of the area, moment tensor inversion of these aftershocks is performed. i have tested a moment tensor inversion technique using synthetic data in the presence of realistic noise levels and determined that source parameters for aftershocks with Mw < 2.1 can not be resolved. The method was applied to the observed data, yielding nineteen-earthquake moment tensor estimates for events between 5.4 Mw to 2.3 Mw. Fault orientations are approximately east-west, consistent with previous studies.
dissertation or thesis originally submitted to the local University of Memphis Electronic Theses & dissertation (ETD) Repository.
Ayele, Solomon Taddese, "Source Parameter Study Based on the April 18, 2008 (5.4 Mw) Mt. Carmel, Illinois Earthquake Sequence" (2010). Electronic Theses and Dissertations. 114.