@article{fdi:010077774,
  title = {{C}oda-{Q} in the 2.5-20 s period band from seismic noise : application to the greater {A}lpine area},
  author = {{S}oergel, {D}. and {P}edersen, {H}. {A}. and {S}tehly, {L}. and {M}argerin, {L}. and {P}aul, {A}. and {H}etenyi, {G}. and {A}breu, {R}. and {A}llegretti, {I}. and {A}poloner, {M}. {T}. and {A}ubert, {C}. and {D}e {B}erc, {M}. {B}. and {B}okelmann, {G}. and {B}runel, {D}. and {C}apello, {M}. and {C}arman, {M}. and {C}avaliere, {A}. and {C}heze, {J}. and {C}hiarabba, {C}. and {C}linton, {J}. and {C}ougoulat, {G}. and {C}rawford, {W}. and {C}ristiano, {L}. and {C}zifra, {T}. and {D}'{A}lema, {E}. and {D}anesi, {S}. and {D}aniel, {R}. and {D}asovic, {I}. and {D}eschamps, {A}. and {D}essa, {J}. {X}. and {D}oubre, {C}. and {E}gdorf, {S}. and {F}iket, {T}. and {F}ischer, {K}. and {F}riederich, {W}. and {F}uchs, {F}. and {F}unke, {S}. and {G}iardini, {D}. and {G}ovoni, {A}. and {G}raczer, {Z}. and {G}roschl, {G}. and {H}eimers, {S}. and {H}eit, {B}. and {H}erak, {D}. and {H}erak, {M}. and {H}uber, {J}. and {J}aric, {D}. and {J}edlicka, {P}. and {J}ia, {Y}. and {J}und, {H}. and {K}issling, {E}. and {K}lingen, {S}. and {K}lotz, {B}. and {K}olinsky, {P}. and {K}orn, {M}. and {K}otek, {J}. and {K}uhne, {L}. and {K}uk, {K}. and {L}oos, {J}. and {M}alengros, {D}. and {M}argheriti, {L}. and {M}aron, {C}. and {M}artin, {X}. and {M}assa, {M}. and {M}azzarini, {F}. and {M}eier, {T}. and {M}etral, {L}. and {M}olinari, {I}. and {M}oretti, {M}. and {M}unzarova, {H}. and {N}ardi, {A}. and {P}ahor, {J}. and {P}aul, {A}. and {P}equegnat, {C}. and {P}esaresi, {D}. and {P}iccinini, {D}. and {P}iromallo, {C}. and {P}lenefisch, {T}. and {P}lomerova, {J}. and {P}ondrelli, {S}. and {P}revolnik, {S}. and {R}acine, {R}. and {R}{\'e}gnier, {M}arc and {R}eiss, {M}. and {R}itter, {J}. and {R}umpker, {G}. and {S}alimbeni, {S}. and {S}chulte-{K}ortnack, {D}. and {S}cherer, {W}. and {S}chippkus, {S}. and {S}ipka, {V}. and {S}pallarossa, {D}. and {S}pieker, {K}. and {S}tipcevic, {J}. and {S}trollo, {A}. and {S}ule, {B}. and {S}zanyi, {G}. and {S}zucs, {E}. and {T}homas, {C}. and {T}ilmann, {F}. and {U}eding, {S}. and {V}allocchia, {M}. and {V}ecsey, {L}. and {V}oigt, {R}. and {W}assermann, {J}. and {W}eber, {Z}. and {W}eidle, {C}. and {W}esztergom, {V}. and {W}eyland, {G}. and {W}iemer, {S}. and {W}olyniec, {D}. and {Z}ieke, {T}. and {Z}ivvic, {M}. and {A}lp{A}rray {W}orking {G}roup},
  editor = {},
  language = {{ENG}},
  abstract = {{C}oda-{Q} is used to estimate the attenuation and scattering properties of the {E}arth. {S}o far focus has been on earthquake data at frequencies above 1 {H}z, as the high noise level in the first and second microseismic peak, and possibly lower scattering coefficient, hinder stable measurements at lower frequencies. {I}n this work, we measure and map coda-{Q} in the period bands 2.5-5 s, 5-10 s and 10-20 s in the greater {A}lpine region using noise cross-correlations between station pairs, based on data from permanent seismic stations and from the temporary {A}lp{A}rray experiment. {T}he observed coda-{Q} for short interstation distances is independent of azimuth so there is no indication of influence of the directivity of the incoming noise field on our measurements. {I}n the 2.5-5 s and 5-10 s period bands, our measurements are self-consistent, and we observe stable geographic patterns of low and high coda-{Q} in the period bands 2.5-5 s and 5-10 s. {I}n the period band 10-20 s, the dispersion of our measurements increases and geographic patterns become speculative. {T}he coda-{Q} maps show that major features are observed with high resolution, with a very good geographical resolution of for example low coda-{Q} in the {P}o {P}lain. {T}here is a sharp contrast between the {P}o {P}lain and the {A}lps and {A}pennines where coda-{Q} is high, with the exception a small area in the {S}wiss {A}lps which may be contaminated by the low coda-{Q} of the {P}o {P}lain. {T}he coda of the correlations is too short to make independent measurements at different times within the coda, so we cannot distinguish between intrinsic and scattering {Q}. {M}easurements on more severely selected data sets and longer time-series result in identical geographical patterns but lower numerical values. {T}herefore, high coda-{Q} values may be overestimated, but the geographic distribution between high and low coda-{Q} areas is respected. {O}ur results demonstrate that noise correlations are a promising tool for extending coda-{Q} measurements to frequencies lower than those analysed with earthquake data.},
  keywords = {{E}urope ; {C}oda waves ; seismic attenuation ; seismic noise ; surface waves and free oscillations ; wave scattering and diffraction ; {EUROPE} ; {ALPES}},
  booktitle = {},
  journal = {{G}eophysical {J}ournal {I}nternational},
  volume = {220},
  numero = {1},
  pages = {202--217},
  ISSN = {0956-540{X}},
  year = {2020},
  DOI = {10.1093/gji/ggz443},
  URL = {https://www.documentation.ird.fr/hor/fdi:010077774},
}