气候变化领域集成服务门户(CCPortal): Restoration of clipped seismic waveforms using projection onto convex sets method

CCPortal

DOI	10.1038/srep39056
	Restoration of clipped seismic waveforms using projection onto convex sets method
	Zhang, Jinhai; Hao, Jinlai; Zhao, Xu; Wang, Shuqin; Zhao, Lianfeng; Wang, Weimin; Yao, Zhenxing
通讯作者	Zhao, X (通讯作者)
发表日期	2016
ISSN	2045-2322
卷号	6
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.
关键词	EARTHS INNER-CORE EARTHQUAKE ALGORITHM BOUNDARY HISTORY MOTION FIELDS
语种	英语
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000390239700001
来源期刊	SCIENTIFIC REPORTS
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258698
推荐引用方式 GB/T 7714	Zhang, Jinhai,Hao, Jinlai,Zhao, Xu,et al. Restoration of clipped seismic waveforms using projection onto convex sets method[J]. 中国科学院青藏高原研究所,2016,6.
APA	Zhang, Jinhai.,Hao, Jinlai.,Zhao, Xu.,Wang, Shuqin.,Zhao, Lianfeng.,...&Yao, Zhenxing.(2016).Restoration of clipped seismic waveforms using projection onto convex sets method.SCIENTIFIC REPORTS,6.
MLA	Zhang, Jinhai,et al."Restoration of clipped seismic waveforms using projection onto convex sets method".SCIENTIFIC REPORTS 6(2016).