High temporal resolution monitoring of small variations in crustal strain by dense seismic arrays

Shujuan Mao, Michel Campillo, Robert D. Hilst, Florent Brenguier, Laurent Stehly, Gregor Hillers

Tutkimustuotos: ArtikkelijulkaisuArtikkeliTieteellinenvertaisarvioitu

Kuvaus

Abstract We demonstrate the feasibility of detecting very weak deformation in the shallow crust with high temporal resolution by monitoring the relative changes in seismic wave velocity (dv/v) using dense arrays of seismometers. We show that the dv/v variations are consistent between independent measurements from two seismic arrays. Dominant peaks in the observed dv/v spectrum suggest that tides and temperature changes are the major causes of daily and sub-daily velocity changes, in accordance with theoretical strain modeling. Our analysis illustrates that dv/v perturbations of the order of 10-4, corresponding to crustal strain changes of the order of 10-8, can be measured from ambient seismic noise with a temporal resolution of one hour. This represents a low-cost technique for high precision and high time-resolution monitoring of crustal deformation that is complementary to existing geodetic measurements and is instrumental in both the detection and understanding of low-amplitude precursory processes of natural catastrophic events.
Alkuperäiskielienglanti
LehtiGeophysical Research Letters
Vuosikerta46
Numero1
Sivut128-137
ISSN0094-8276
DOI - pysyväislinkit
TilaJulkaistu - 28 marraskuuta 2018
OKM-julkaisutyyppiA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä, vertaisarvioitu

Lisätietoja

doi: 10.1029/2018GL079944

Tieteenalat

  • 1171 Geotieteet

Lainaa tätä

Mao, Shujuan ; Campillo, Michel ; Hilst, Robert D. ; Brenguier, Florent ; Stehly, Laurent ; Hillers, Gregor. / High temporal resolution monitoring of small variations in crustal strain by dense seismic arrays. Julkaisussa: Geophysical Research Letters. 2018 ; Vuosikerta 46, Nro 1. Sivut 128-137.
@article{84cbd54fd9d945aba97c2144aba125b1,
title = "High temporal resolution monitoring of small variations in crustal strain by dense seismic arrays",
abstract = "Abstract We demonstrate the feasibility of detecting very weak deformation in the shallow crust with high temporal resolution by monitoring the relative changes in seismic wave velocity (dv/v) using dense arrays of seismometers. We show that the dv/v variations are consistent between independent measurements from two seismic arrays. Dominant peaks in the observed dv/v spectrum suggest that tides and temperature changes are the major causes of daily and sub-daily velocity changes, in accordance with theoretical strain modeling. Our analysis illustrates that dv/v perturbations of the order of 10-4, corresponding to crustal strain changes of the order of 10-8, can be measured from ambient seismic noise with a temporal resolution of one hour. This represents a low-cost technique for high precision and high time-resolution monitoring of crustal deformation that is complementary to existing geodetic measurements and is instrumental in both the detection and understanding of low-amplitude precursory processes of natural catastrophic events.",
keywords = "1171 Geosciences",
author = "Shujuan Mao and Michel Campillo and Hilst, {Robert D.} and Florent Brenguier and Laurent Stehly and Gregor Hillers",
note = "doi: 10.1029/2018GL079944",
year = "2018",
month = "11",
day = "28",
doi = "10.1029/2018GL079944",
language = "English",
volume = "46",
pages = "128--137",
journal = "Geophysical Research Letters",
issn = "0094-8276",
publisher = "American Geophysical Union",
number = "1",

}

High temporal resolution monitoring of small variations in crustal strain by dense seismic arrays. / Mao, Shujuan; Campillo, Michel; Hilst, Robert D.; Brenguier, Florent; Stehly, Laurent; Hillers, Gregor.

julkaisussa: Geophysical Research Letters, Vuosikerta 46, Nro 1, 28.11.2018, s. 128-137.

Tutkimustuotos: ArtikkelijulkaisuArtikkeliTieteellinenvertaisarvioitu

TY - JOUR

T1 - High temporal resolution monitoring of small variations in crustal strain by dense seismic arrays

AU - Mao, Shujuan

AU - Campillo, Michel

AU - Hilst, Robert D.

AU - Brenguier, Florent

AU - Stehly, Laurent

AU - Hillers, Gregor

N1 - doi: 10.1029/2018GL079944

PY - 2018/11/28

Y1 - 2018/11/28

N2 - Abstract We demonstrate the feasibility of detecting very weak deformation in the shallow crust with high temporal resolution by monitoring the relative changes in seismic wave velocity (dv/v) using dense arrays of seismometers. We show that the dv/v variations are consistent between independent measurements from two seismic arrays. Dominant peaks in the observed dv/v spectrum suggest that tides and temperature changes are the major causes of daily and sub-daily velocity changes, in accordance with theoretical strain modeling. Our analysis illustrates that dv/v perturbations of the order of 10-4, corresponding to crustal strain changes of the order of 10-8, can be measured from ambient seismic noise with a temporal resolution of one hour. This represents a low-cost technique for high precision and high time-resolution monitoring of crustal deformation that is complementary to existing geodetic measurements and is instrumental in both the detection and understanding of low-amplitude precursory processes of natural catastrophic events.

AB - Abstract We demonstrate the feasibility of detecting very weak deformation in the shallow crust with high temporal resolution by monitoring the relative changes in seismic wave velocity (dv/v) using dense arrays of seismometers. We show that the dv/v variations are consistent between independent measurements from two seismic arrays. Dominant peaks in the observed dv/v spectrum suggest that tides and temperature changes are the major causes of daily and sub-daily velocity changes, in accordance with theoretical strain modeling. Our analysis illustrates that dv/v perturbations of the order of 10-4, corresponding to crustal strain changes of the order of 10-8, can be measured from ambient seismic noise with a temporal resolution of one hour. This represents a low-cost technique for high precision and high time-resolution monitoring of crustal deformation that is complementary to existing geodetic measurements and is instrumental in both the detection and understanding of low-amplitude precursory processes of natural catastrophic events.

KW - 1171 Geosciences

U2 - 10.1029/2018GL079944

DO - 10.1029/2018GL079944

M3 - Article

VL - 46

SP - 128

EP - 137

JO - Geophysical Research Letters

JF - Geophysical Research Letters

SN - 0094-8276

IS - 1

ER -