@article{PAR00011263,
  title = {{H}igh-frequency directivity effect for an {M}-w 4.1 earthquake, widely felt by the population in southeastern {F}rance},
  author = {{C}ourboulex, {F}. and {D}ujardin, {A}. and {V}all{\'e}e, {M}artin and {D}elouis, {B}. and {S}ira, {C}. and {D}eschamps, {A}. and {H}onore, {L}. and {T}houvenot, {F}.},
  editor = {},
  language = {{ENG}},
  abstract = {{W}e document a moderate earthquake in the {F}rench {A}lps (26 {F}ebruary 2012 {M}-w 4.1) that has been much more distinctly felt south of the event than north of it. {T}his discrepancy was especially clear in the two large cities of {N}ice and {G}renoble, both situated at 100 km from the epicenter. {T}his observation was confirmed by ground-motion measurements that were eight times larger in one city than in the other one, for the same site conditions. {U}sing a time-domain deconvolution between the broadband recordings of the mainshock and an aftershock used as empirical {G}reen's functions, we show that the rupture process of this event had a strong directivity effect toward a direction of {N}155 degrees +/- 5 on an similar to 2 km long fault, detectable only at frequencies higher than 1 {H}z. {T}he fault size and direction are in good accordance with the location of the aftershocks. {D}espite the various possible contributions leading to high-frequency amplification, we show here that this simple directivity effect controlled the intensity felt by the population and the acceleration measured in the cities.},
  keywords = {{FRANCE}},
  booktitle = {},
  journal = {{B}ulletin of the {S}eismological {S}ociety of {A}merica},
  volume = {103},
  numero = {6},
  pages = {3347--3353},
  ISSN = {0037-1106},
  year = {2013},
  DOI = {10.1785/0120130073},
  URL = {https://www.documentation.ird.fr/hor/{PAR}00011263},
}