利用电磁数据估算海啸震源:综合综述。

IF 4.3 3区 综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences Pub Date : 2024-12-23 Epub Date: 2024-12-02 DOI:10.1098/rsta.2024.0082
Toshitaka Baba, Zhiheng Lin, Takuto Minami, Hiroaki Toh
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引用次数: 0

摘要

海底压力计因其已确立的准确性和稳定性而广泛用于海啸观测。最近的进展表明,当大海啸经过海洋时,磁场会发生波动,这表明海底电磁计(obem)可能取代压力表。本文综合介绍了海啸磁场的最新研究成果及其在海啸震源估计中的应用。此外,我们还考察了利用obms进行海啸观测的有效性。尽管电磁力计很有前途,但值得注意的是,电磁观测中固有的背景噪声往往比海啸临界频带内压力观测的背景噪声大大约10倍。地球磁场偶尔会干扰海啸磁场,与压力表相比,电磁计在海啸探测中的应用存在潜在的局限性。然而,我们的研究强调了电磁观测在探测几厘米量级的海啸在海洋上传播方面的潜力。电磁力计相对于压力监测的宝贵优势在于其观测海啸速度场的能力,这为海啸观测技术的进一步研究和发展提供了一条有前途的途径。这篇文章是主题“地球和行星海洋的磁测遥感”的一部分。
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Harnessing electromagnetic data for tsunami source estimation: a comprehensive review.

Ocean-bottom pressure gauges are widely used for tsunami observations due to their established accuracy and stability. Recent advancements reveal that the magnetic field fluctuates when a large tsunami passes over the ocean, suggesting potential alternatives to pressure gauges in the form of ocean-bottom electromagnetometers (OBEMs). This article offers a comprehensive synthesis of recent findings concerning tsunami magnetic fields and their utility in tsunami source estimation. In addition, we scrutinize the effectiveness of tsunami observations employing OBEMs. Despite the promise of electromagnetometers, it is worth noting that the background noise inherent in electromagnetic observations tends to be approximately 10 times greater than that of pressure observations within the critical tsunami frequency bands. The Earth's magnetic field sporadically disrupts tsunami magnetic fields, presenting a potential limitation to the utility of electromagnetometers in tsunami detection when compared with pressure gauges. Nevertheless, our investigation underscores the potential of electromagnetic observations in detecting tsunamis propagating over the ocean at magnitudes of a few centimetres. An invaluable advantage of electromagnetometers over pressure monitoring lies in their capability to observe tsunami velocity fields, suggesting a promising avenue for further research and development in tsunami observation technology.This article is part of the theme issue 'Magnetometric remote sensing of Earth and planetary oceans'.

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来源期刊
CiteScore
9.30
自引率
2.00%
发文量
367
审稿时长
3 months
期刊介绍: Continuing its long history of influential scientific publishing, Philosophical Transactions A publishes high-quality theme issues on topics of current importance and general interest within the physical, mathematical and engineering sciences, guest-edited by leading authorities and comprising new research, reviews and opinions from prominent researchers.
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