Observing and Modeling the Spectrum of a Slow Slip Event
Observing and Modeling the Spectrum of a Slow Slip Event
复制标题
慢滑移事件的频谱观测和建模
DOI:
10.1029/2017jb015124
复制
发表时间:
2018
期刊:
影响因子:
3.4
通讯作者:
Hawthorne J
中科院分区:
文献类型:
--
作者:
Hawthorne J
We estimate and model the normalized moment rate power spectrum of large slow slip events in Cascadia. We estimate the spectrum using data from GPS‐derived slip inversions, borehole strain records, and beamforming‐based tremor amplitudes. The normalized power spectrum initially decreases with frequency but then may flatten at periods of 1 to 10 days before decaying as frequency at higher frequencies, wherenmis between 1.1 and 1.4 when estimated from tremor and between 0.4 and 1.5 when estimated from strain. We explore one way to understand the observed spectrum: by modeling a month‐long slow slip event as the sum of a steady background moment rate and a population of subevents. The subevents represent the wide variety of observed slow earthquakes, ranging from 0.5‐s‐long tremor to 3‐hr‐long rapid tremor reversals. We parameterize the subevents' magnitude distribution and moment‐duration scaling, and we examine how the subevent population determines the slow slip spectrum. There are not enough data to rigorously test the subevent model, but we show that the data are consistent with a single continuum of slow earthquakes whose moments scale linearly with their duration, as has been proposed previously.
登录
查看更多内容
影响因子:
3.9
作者:
Frank, William B.;Shapiro, Nikolai M.;Campillo, Michel
通讯作者:
Campillo, Michel
DOI:
--
发表时间:
2011
期刊:
影响因子:
--
作者:
N. Gershenzon;G. Bambakidis;E. Hauser;A. Ghosh;K. Creager
通讯作者:
K. Creager
DOI:
--
发表时间:
--
期刊:
影响因子:
--
作者:
G. Papathanasiou;M. Papandreou;A. Galanos;E. Kortianou;E. Tsepis;V. Kalfakakou;A. Evangelou
通讯作者:
A. Evangelou
DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
W. Frank;Baptiste Rousset;C. Lasserre;M. Campillo
通讯作者:
M. Campillo
影响因子:
5.3
作者:
Bletery, Quentin;Thomas, Amanda M.;Krogstad, Randy D.
通讯作者:
Krogstad, Randy D.