Locating the Precise Sources of High‐Frequency Microseisms Using Distributed Acoustic Sensing
Abstract
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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Sep 09, 2022
- Source ID
- 10.1029/2022gl099292
Entities
People
- Beatriz Gaite
- Han Xiao
- Loïc Viens
- M. Pan
- Sandra Ruiz Barajas
- Toshiro Tanimoto
- Zack Spica
Organizations
- Air Force Research Laboratory
- Institut national de l'information géographique et forestière
- National Science Foundation
- Southern California Earthquake Center
- Southern University of Science and Technology
- University of California, Santa Barbara
- University of Michigan