| Restoration of clipped seismic waveforms using projection onto convex sets method | |
| 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; Zhao, X | |
| Source Publication | SCIENTIFIC REPORTS
 |
| 2016 | |
| Volume | 6Issue:0Pages:39056 |
| DOI | 10.1038/srep39056 |
| Abstract | 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. |
| Subject Area | 地球物理学 |
| WOS ID | WOS:000390239700001 |
| Language | 英语 |
| Indexed By | SCI |
| Keyword | Earths Inner-core Earthquake Algorithm Boundary History Motion Fields |
| Cooperation Status | 国内 |
| Subtype | Article |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.itpcas.ac.cn/handle/131C11/7474 |
| Collection | 图书馆 |
| Corresponding Author | Zhao, X |
| Affiliation | 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 GB/T 7714 | 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. |
| APA | Zhang, JH .,Hao, JL .,Zhao, X .,Wang, SQ .,Zhao, LF .,...&Zhao, X.(2016).Restoration of clipped seismic waveforms using projection onto convex sets method.SCIENTIFIC REPORTS,6(0),39056. |
| MLA | Zhang, JH ,et al."Restoration of clipped seismic waveforms using projection onto convex sets method".SCIENTIFIC REPORTS 6.0(2016):39056. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| V.6 39056 2016.pdf（2855KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment