Two-Dimensional Correlation Analysis of Periodicity in Noisy Series: Case of VLF Signal Amplitude Variations in the Time Vicinity of an Earthquake
文献类型：期刊论文
| 作者 | Kovacevic, AB; Nina, A; Popovic, LC; Radovanovic, M |
| 刊名 | MATHEMATICS
 |
| 出版日期 | 2022 |
| 卷号 | 10期号:22页码:4278 |
| 关键词 | numerical method periodicity detection VLF signal amplitude earthquake |
| DOI | 10.3390/math10224278 |
| 文献子类 | Article |
| 英文摘要 | Extraction of information in the form of oscillations from noisy data of natural phenomena such as sounds, earthquakes, ionospheric and brain activity, and various emissions from cosmic objects is extremely difficult. As a method for finding periodicity in such challenging data sets, the 2D Hybrid approach, which employs wavelets, is presented. Our technique produces a wavelet transform correlation intensity contour map for two (or one) time series on a period plane defined by two independent period axes. Notably, by spreading peaks across the second dimension, our method improves the apparent resolution of detected oscillations in the period plane and identifies the direction of signal changes using correlation coefficients. We demonstrate the performance of the 2D Hybrid technique on a very low frequency (VLF) signal emitted in Italy and recorded in Serbia in time vicinity of the occurrence of an earthquake on 3 November 2010, near Kraljevo, Serbia. We identified a distinct signal in the range of 120-130 s that appears only in association with the considered earthquake. Other wavelets, such as Superlets, which may detect fast transient oscillations, will be employed in future analysis. |
| 电子版国际标准刊号 | 2227-7390 |
| 语种 | 英语 |
| WOS记录号 | WOS:000887486500001 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/299855]  |
| 专题 | 高能物理研究所_粒子天体物理中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Kovacevic, AB,Nina, A,Popovic, LC,et al. Two-Dimensional Correlation Analysis of Periodicity in Noisy Series: Case of VLF Signal Amplitude Variations in the Time Vicinity of an Earthquake[J]. MATHEMATICS,2022,10(22):4278. |
| APA | Kovacevic, AB,Nina, A,Popovic, LC,&Radovanovic, M.(2022).Two-Dimensional Correlation Analysis of Periodicity in Noisy Series: Case of VLF Signal Amplitude Variations in the Time Vicinity of an Earthquake.MATHEMATICS,10(22),4278. |
| MLA | Kovacevic, AB,et al."Two-Dimensional Correlation Analysis of Periodicity in Noisy Series: Case of VLF Signal Amplitude Variations in the Time Vicinity of an Earthquake".MATHEMATICS 10.22(2022):4278. |
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来源：高能物理研究所
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