PROPAGATION OF HIGH-FREQUENCY (4- TO 50-HZ) P-WAVES IN THE NORTHEASTERN UNITED-STATES

Authors
CHAEL EP LEAHY PJ CARTER JA BARSTOW N POMEROY PW
Citation
Ep. Chael et al., PROPAGATION OF HIGH-FREQUENCY (4- TO 50-HZ) P-WAVES IN THE NORTHEASTERN UNITED-STATES, Bulletin of the Seismological Society of America, 85(4), 1995, pp. 1244-1248
Citations number
9
Categorie Soggetti
Geosciences, Interdisciplinary
Journal title
Bulletin of the Seismological Society of America → ACNP
ISSN journal
00371106
Volume
85
Issue
4
Year of publication
1995
Pages
1244 - 1248
Database
ISI
SICI code
0037-1106(1995)85:4<1244:POH(T5>2.0.ZU;2-T
Abstract
We have measured the decay rate of high-frequency (4- to 50-Hz) P wave s in the northeastern United States. We analyzed signals from 28 explo sions of a 1988 USGS/AFGL/GSC refraction survey recorded at distances between 30 and 400 km. Over this range, the decay rate steadily increa ses from Delta(-2) at 10 Hz to Delta(-4), 45 Hz. If one assumes geomet ric spreading of Delta(-13), then the remaining decay is consistent wi th a nearly frequency-independent Q of about 1000. The results provide a useful parameterization for predicting P-wave spectra at near-regio nal ranges.