Locating the Precise Sources of High-Frequency Microseisms Using Distributed Acoustic Sensing

Xiao, Han1,2; Tanimoto, Toshiro1,2; Spica, Zack J.3; Gaite, Beatriz4; Ruiz-Barajas, Sandra4; Pan, Mohan5; Viens, Loic3

2022-09-16

10.1029/2022GL099292

GEOPHYSICAL RESEARCH LETTERS   Impact Factor & Quartile

0094-8276

1944-8007

Although microseisms have been observed for more than 100 years, the precise locations of their excitation sources in the oceans are still elusive. Underwater Distributed Acoustic Sensing (DAS) brings new opportunities to study microseism generation mechanisms. Using DAS data off the coast of Valencia, Spain, and applying a cross-correlation approach, we show that the sources of high-frequency microseisms (0.5-2 Hz) are confined between 7 and 27 km from the shore, where the water depth varies from 25 to 100 m. Over time, we observe that these sources move quickly along narrow areas, sometimes within a few kilometers. Our methodology applied to DAS data allows us to characterize microseisms with a high spatiotemporal resolution, providing a new way of understanding these global and complex seismic phenomena happening in the oceans.

microseisms DAS seismic noise ocean waves Scholte waves wind

SCI

English

NI Journal Papers

Others

Geology

Geosciences, Multidisciplinary

WOS:000855081400001

AMER GEOPHYSICAL UNION

GEOSCIENCES

Web of Science

1.Univ Calif Santa Barbara, Dept Earth Sci, Santa Barbara, CA 93106 USA
2.Univ Calif Santa Barbara, Earth Res Inst, Santa Barbara, CA 93106 USA
3.Univ Michigan, Dept Earth & Environm Sci, Ann Arbor, MI 48109 USA
4.Natl Geog Inst Spain, Madrid, Spain
5.Southern Univ Sci & Technol, OBS Lab, Dept Ocean Sci & Engn, Shenzhen, Peoples R China

Xiao, Han,Tanimoto, Toshiro,Spica, Zack J.,et al. Locating the Precise Sources of High-Frequency Microseisms Using Distributed Acoustic Sensing[J]. GEOPHYSICAL RESEARCH LETTERS,2022,49(17).

Xiao, Han.,Tanimoto, Toshiro.,Spica, Zack J..,Gaite, Beatriz.,Ruiz-Barajas, Sandra.,...&Viens, Loic.(2022).Locating the Precise Sources of High-Frequency Microseisms Using Distributed Acoustic Sensing.GEOPHYSICAL RESEARCH LETTERS,49(17).

Xiao, Han,et al."Locating the Precise Sources of High-Frequency Microseisms Using Distributed Acoustic Sensing".GEOPHYSICAL RESEARCH LETTERS 49.17(2022).