| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
U.S. GEOLOGICAL SURVEY, 345 MIDDLEFIELD ROAD, MENLO PARK, CALIFORNIA 94025
Abstract
The north-central Arkansas swarm, which began in January of 1982 and was still active as of December 1983, has produced over 30,000 events. Three of these events had duration magnitudes greater than 4.0. Fifty-three locatable events, in the magnitude range 3.8 and below, were recorded during the 2 1/2 weeks our 10 digital seismographs were in place. The hypocentral locations are confined to a tight cluster, with a radius of approximately 1 km. Depths range between 4 and 7 km. Focal mechanisms determined for 10 of the events show a combination of strike slip and normal faulting.
Source parameters—seismic moment, source radius, and stress drop—were calculated for 48 of the events. The seismic moments range from 1018 to 1021 dyne-cm while the stress drops range from 0.2 to 60 bars. Acceleration spectra are band-limited at the high end at 30 Hz. The stress drops increase with seismic moment up to 1020 dyne-cm but appear to be constant at greater moment values. The Arkansas source parameters are similar to other body-wave source parameters determined from near-source investigations of earthquakes in Eastern and Central North America (e.g., New Brunswick and South Carolina) and in California (e.g., Mammoth Lakes, Oroville, and Anza), but differ substantially from Lg-wave source parameters estimated for earthquakes in the Eastern and Central United States.
This article has been cited by other articles:
|
|
 |
|
  J. Shi, W.-Y. Kim, and P. G. Richards The corner frequencies and stress drops of intraplate earthquakes in the northeastern United States Bulletin of the Seismological Society of America, April 1, 1998; 88(2): 531 - 542. [Abstract] [PDF]
|
|
|
|
|
|
Y. IIO Seismic source spectrum of microearthquakes Bulletin of the Seismological Society of America, December 1, 1992; 82(6): 2391 - 2409. [Abstract] [PDF]
|
|
|
|
 |
|
 T. C. Hanks and T. C. Hanks Small Earthquakes, Tectonic Forces Science, June 5, 1992; 256(5062): 1430 - 1432. [Abstract] [PDF]
|
|
|
|
|
|
T. C. HANKS and A. C. JOHNSTON Common features of the excitation and propagation of strong ground motion for North American earthquakes Bulletin of the Seismological Society of America, February 1, 1992; 82(1): 1 - 23. [Abstract] [PDF]
|
|
|
|
|
|
M. FEHLER and W. S. PHILLIPS Simultaneous inversion for Q and source parameters of microearthquakes accompanying hydraulic fracturing in granitic rock Bulletin of the Seismological Society of America, April 1, 1991; 81(2): 553 - 575. [Abstract] [PDF]
|
|
|
|
|
|
G. GLASSMOYER and R. D. BORCHERDT Source parameters and effects of bandwidth and local geology on high-frequency ground motions observed for aftershocks of the northeastern Ohio earthquake of 31 January 1986 Bulletin of the Seismological Society of America, August 1, 1990; 80(4): 889 - 912. [Abstract] [PDF]
|
|
|
|
|
|
J. PUJOL, J.-M. CHIU, A. JOHNSTON, and B.-H. CHIN On the relocation of earthquake clusters. A case history: The Arkansas earthquake swarm Bulletin of the Seismological Society of America, December 1, 1989; 79(6): 1846 - 1862. [Abstract] [PDF]
|
|
|
|
|
|
K. W. CAMPBELL The dependence of peak horizontal acceleration on magnitude, distance, and site effects for small-magnitude earthquakes in California and Eastern North America Bulletin of the Seismological Society of America, October 1, 1989; 79(5): 1311 - 1346. [Abstract] [PDF]
|
|
|
|
|
|
E. P. CHAEL and R. P. KROMER High-frequency spectral scaling of a main shock/ aftershock sequence near the Norwegian coast Bulletin of the Seismological Society of America, April 1, 1988; 78(2): 561 - 570. [Abstract] [PDF]
|
|
|
|
|
|
P. S. DYSART, J. A. SNOKE, and I. S. SACKS Source parameters and scaling relations for small earthquakes in the Matsushiro region, southwest Honshu, Japan Bulletin of the Seismological Society of America, April 1, 1988; 78(2): 571 - 589. [Abstract] [PDF]
|
|
|
|
|
|
P. G. SOMERVILLE, J. P. MCLAREN, L. V. LEFEVRE, R. W. BURGER, and D. V. HELMBERGER Comparison of source scaling relations of eastern and western North American earthquakes Bulletin of the Seismological Society of America, April 1, 1987; 77(2): 322 - 346. [Abstract] [PDF]
|
|
|
|
|
|
C. K. SAIKIA and R. B. HERRMANN Moment-tensor solutions for three 1982 Arkansas swarm earthquakes by waveform modeling Bulletin of the Seismological Society of America, June 1, 1986; 76(3): 709 - 723. [Abstract] [PDF]
|
|
|
|
|
|
K. W. CAMPBELL An empirical estimate of near-source ground motion for a major, mb = 6.8, earthquake in the eastern United States Bulletin of the Seismological Society of America, February 1, 1986; 76(1): 1 - 17. [Abstract] [PDF]
|
|
|
|
|
|
L. C. HAAR, C. S. MUELLER, J. B. FLETCHER, and D. M. BOORE Comments on "Some recent Lg phase displacement spectral densities and their implications with respect to prediction of ground motions in Eastern North America" by R. Street Bulletin of the Seismological Society of America, February 1, 1986; 76(1): 291 - 295. [PDF]
|
|
|
|
|
|
E. CRANSWICK, R. WETMILLER, and J. BOATWRIGHT High-frequency observations and source parameters of microearthquakes recorded at hard-rock sites Bulletin of the Seismological Society of America, December 1, 1985; 75(6): 1535 - 1567. [Abstract] [PDF]
|
|
|
|
|
|
C. S. MUELLER and E. CRANSWICK Source parameters from locally recorded aftershocks of the 9 January 1982 Miramichi, New Brunswick, earthquake Bulletin of the Seismological Society of America, April 1, 1985; 75(2): 337 - 360. [Abstract] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
