Distributed acoustic sensing of microseismic sources and wave propagation in glaciated terrain.
Journal
Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555
Informations de publication
Date de publication:
15 May 2020
15 May 2020
Historique:
received:
09
10
2019
accepted:
27
03
2020
entrez:
17
5
2020
pubmed:
18
5
2020
medline:
18
5
2020
Statut:
epublish
Résumé
Records of Alpine microseismicity are a powerful tool to study landscape-shaping processes and warn against hazardous mass movements. Unfortunately, seismic sensor coverage in Alpine regions is typically insufficient. Here we show that distributed acoustic sensing (DAS) bridges critical observational gaps of seismogenic processes in Alpine terrain. Dynamic strain measurements in a 1 km long fiber optic cable on a glacier surface produce high-quality seismograms related to glacier flow and nearby rock falls. The nearly 500 cable channels precisely locate a series of glacier stick-slip events (within 20-40 m) and reveal seismic phases from which thickness and material properties of the glacier and its bed can be derived. As seismic measurements can be acquired with fiber optic cables that are easy to transport, install and couple to the ground, our study demonstrates the potential of DAS technology for seismic monitoring of glacier dynamics and natural hazards.
Identifiants
pubmed: 32415062
doi: 10.1038/s41467-020-15824-6
pii: 10.1038/s41467-020-15824-6
pmc: PMC7229220
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
2436Références
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