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学科主题: 地球科学::地球物理学
题名: Restoration of clipped seismic waveforms using projection onto convex sets method
作者: Zhang, JH (Zhang, Jinhai)1; Hao, JL (Hao, Jinlai)1; Zhao, X (Zhao, Xu)1; Wang, SQ (Wang, Shuqin)2; Zhao, LF (Zhao, Lianfeng)1; Wang, WM (Wang, Weimin)3; Yao, ZX (Yao, Zhenxing)1
通讯作者: Zhao, X
关键词: EARTHS INNER-CORE ; EARTHQUAKE ; ALGORITHM ; BOUNDARY ; HISTORY ; MOTION ; FIELDS
刊名: SCIENTIFIC REPORTS
发表日期: 2016
DOI: 10.1038/srep39056
卷: 6, 期:0, 页:39056
收录类别: SCI
合作性质: 国内
文章类型: Article
英文摘要: The seismic waveforms would be clipped when the amplitude exceeds the upper-limit dynamic range of seismometer. Clipped waveforms are typically assumed not useful and seldom used in waveformbased research. Here, we assume the clipped components of the waveform share the same frequency content with the un-clipped components. We leverage this similarity to convert clipped waveforms to true waveforms by iteratively reconstructing the frequency spectrum using the projection onto convex sets method. Using artificially clipped data we find that statistically the restoration error is similar to 1% and similar to 5% when clipped at 70% and 40% peak amplitude, respectively. We verify our method using real data recorded at co-located seismometers that have different gain controls, one set to record large amplitudes on scale and the other set to record low amplitudes on scale. Using our restoration method we recover 87 out of 93 clipped broadband records from the 2013 Mw6.6 Lushan earthquake. Estimating that we recover 20 clipped waveforms for each M5.0+ earthquake, so for the similar to 1,500 M5.0+ events that occur each year we could restore similar to 30,000 clipped waveforms each year, which would greatly enhance useable waveform data archives. These restored waveform data would also improve the azimuthal station coverage and spatial footprint.
语种: 英语
WOS记录号: WOS:000390239700001
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.itpcas.ac.cn/handle/131C11/7474
Appears in Collections:图书馆_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China
2.Minzu Univ China, Sch Informat Engn, Beijing 100081, Peoples R China
3.Chinese Acad, Inst Tibetan Plateau Res, Key Lab Continental Collis & Plateau Uplift, Beijing 100101, Peoples R China

Recommended Citation:
Zhang, JH ,Hao, JL ,Zhao, X ,et al. Restoration of clipped seismic waveforms using projection onto convex sets method[J]. SCIENTIFIC REPORTS,2016,6(0):39056.
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