Earthquake sequences and b values in the southeast United States
- 1 February 1974
- journal article
- Published by Seismological Society of America (SSA) in Bulletin of the Seismological Society of America
- Vol. 64 (1), 267-273
- https://doi.org/10.1785/bssa0640010267
Abstract
Aftershock and foreshock activity within 12 hr of the July 13, 1971 earthquake near Seneca, South Carolina, indicates a b value of 0.9 at ML = 3.0. Approximately 40 events recorded in a 5-day aftershock survey near Seneca indicate a b value of 1.7 at ML = 0.5. A sequence of over 40 events occurring west of McCormick, South Carolina, indicates a b value of 1.3 at ML = 2.4. The McCormick sequence was active for 4 months. Unlike the Seneca region, the McCormick region has a history of earthquake activity. Examinations of other published southeastern b values suggest that southeastern United States earthquakes originate from conditions of ambient stress which vary with epicentral region or magnitude.Keywords
This publication has 7 references indexed in Scilit:
- Seismic wave attenuation and magnitude relations for eastern North AmericaJournal of Geophysical Research, 1973
- Historical and recent seismic activity in South CarolinaBulletin of the Seismological Society of America, 1972
- Some discriminatory characteristics of earthquakes near the Kariba, Kremasta, and Koyna artificial lakesBulletin of the Seismological Society of America, 1972
- Common features of the reservoir-associated seismic activitiesBulletin of the Seismological Society of America, 1972
- Magnitude-frequency relation and deep-focus earthquakesBulletin of the Seismological Society of America, 1971
- The detailed seismicity of Mid-Oceanic ridgesEarth and Planetary Science Letters, 1968
- The frequency-magnitude relation of microfracturing in rock and its relation to earthquakesBulletin of the Seismological Society of America, 1968