globalchange  > 科学计划与规划
DOI: 10.1002/2016GL068546
论文题名:
Diminishing high-frequency directivity due to a source effect: Empirical evidence from small earthquakes in the Abruzzo region, Italy
作者: Pacor F.; Gallovič F.; Puglia R.; Luzi L.; D'Amico M.
刊名: Geophysical Research Letters
ISSN: 0094-9681
EISSN: 1944-9412
出版年: 2016
卷: 43, 期:10
起始页码: 5000
结束页码: 5008
语种: 英语
英文关键词: aftershocks ; directivity effect ; earthquake source physics ; Mw 6.1 2009 L'Aquila earthquake ; small earthquakes ; source spectrum
Scopus关键词: Geophysics ; Aftershocks ; Directivity effect ; Earthquake source ; L'aquila earthquakes ; Small earthquakes ; Source spectrum ; Earthquakes ; Aquila
英文摘要: The aim of this study is to investigate the directivity effects of ~250 aftershocks (magnitudes 3–5.5) of the Mw 6.1 2009 L'Aquila earthquake (central Italy). To this end, we estimate the apparent source spectra at each station removing path and site effects inferred by standard Generalized Inversion Technique. Then, we evaluate the residuals between the apparent source spectra and the event mean source spectrum at selected frequencies. We investigate azimuthal and frequency dependence of the residuals for 40 events with the best station coverage. For most of events with the strongest directivity effect (Mw 3.4–4.0), we observe a remarkable decrease of the directivity amplification at high frequencies, which has not yet been documented for such relatively small-magnitude events. Since there is negligible distance dependence, we ascribe this observation to a source phenomenon such as significant small-scale rupture propagation complexity. ©2016. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84971330635&doi=10.1002%2f2016GL068546&partnerID=40&md5=4770b346d769008a0a2bf61dad21adba
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被引频次[WOS]:41   [查看WOS记录]     [查看WOS中相关记录]
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10644
Appears in Collections:科学计划与规划
气候变化与战略

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作者单位: Istituto Nazionale di Geofisica e Vulcanologia, Milan, Italy

Recommended Citation:
Pacor F.,Gallovič F.,Puglia R.,et al. Diminishing high-frequency directivity due to a source effect: Empirical evidence from small earthquakes in the Abruzzo region, Italy[J]. Geophysical Research Letters,2016-01-01,43(10).
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