DOI: 10.1002/2016GL071433
论文题名: Moment rate scaling for earthquakes 3.3 ≤ M ≤ 5.3 with implications for stress drop
作者: Archuleta R.J. ; Ji C.
刊名: Geophysical Research Letters
ISSN: 0094-8356
EISSN: 1944-8087
出版年: 2016
卷: 43, 期: 23 起始页码: 12004
结束页码: 12011
语种: 英语
英文关键词: earthquake
; seismic moment
; stress drop
; strong motion
Scopus关键词: Drops
; Earthquake effects
; Geophysics
; Seismology
; Fourier amplitude spectra
; High frequency HF
; Peak ground acceleration
; Peak ground velocity
; Seismic moment
; Stress drop
; Stress parameter
; Strong motion
; Earthquakes
英文摘要: We have determined a scalable apparent moment rate function (aMRF) that correctly predicts the peak ground acceleration (PGA), peak ground velocity (PGV), local magnitude, and the ratio of PGA/PGV for earthquakes 3.3 ≤ M ≤ 5.3. Using the NGA-West2 database for 3.0 ≤ M ≤ 7.7, we find a break in scaling of LogPGA and LogPGV versus M around M ~ 5.3 with nearly linear scaling for LogPGA and LogPGV for 3.3 ≤ M ≤ 5.3. Temporal parameters tp and td—related to rise time and total duration—control the aMRF. Both scale with seismic moment. The Fourier amplitude spectrum of the aMRF has two corners between which the spectrum decays ~ f− 1. Significant attenuation along the raypath results in a Brune-like spectrum with one corner fC. Assuming that fC ≅ 1/td, the aMRF predicts non-self-similar scaling (Formula presented.) and weak stress drop scaling (Formula presented.). This aMRF can explain why stress drop is different from the stress parameter used to predict high-frequency ground motion. ©2016. The Authors. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85006091172&doi=10.1002%2f2016GL071433&partnerID=40&md5=76f6d3a737eea688a62d184c591026a7
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9319
Appears in Collections: 科学计划与规划 气候变化与战略
There are no files associated with this item.
作者单位: Department of Earth Science, University of California, Santa Barbara, CA, United States
Recommended Citation:
Archuleta R.J.,Ji C.. Moment rate scaling for earthquakes 3.3 ≤ M ≤ 5.3 with implications for stress drop[J]. Geophysical Research Letters,2016-01-01,43(23).