@article{fdi:010069453,
  title = {{S}patial variability of the directivity pulse periods observed during an earthquake},
  author = {{F}ayjaloun, {R}. and {C}ausse, {M}. and {V}oisin, {C}. and {C}ornou, {C}{\'e}cile and {C}otton, {F}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he ground velocity pulses generated by rupture directivity effects in the near-fault region can cause a large amount of damage to structures. {P}roper estimation of the period of such velocity pulses is of particular importance in characterizing near-fault seismic hazard and mitigating potential damage. {W}e propose a simple equation to determine the pulse period as a function of the site location with respect to the fault rupture (defined by the hypocentral distance hyp{D}, the closest distance to the rupture area cls{D}, and the length of the rupture area that breaks toward the site {D}) and some basic rupture properties (average rupture speed and average rise time). {O}ur equation is first validated from a dataset of synthetic velocity time histories, deploying simulations of various strike-slip extended ruptures in a homogeneous medium. {T}he analysis of the synthetic dataset confirms that the pulse period does not depend on the whole rupture area, but only on the parameter {D}. {I}t also reveals that the pulse period is not sensitive to the level of slip heterogeneity on the fault plane. {O}ur model is tested next on a real dataset build from the {N}ext {G}eneration {A}ttenuation-{W}est2 {P}roject database, compiling 110 observations of velocity pulse periods from 10 strike-slip events and 6 non-strike-slip events. {T}he standard deviation of the natural logarithm residuals between observations and predictions is similar to 0.5. {F}urthermore, the correlation coefficient between observations and predictions equals similar to 0.8, indicating that despite its simplicity, our model explains fairly well the spatial variability of the pulse periods.},
  keywords = {},
  booktitle = {},
  journal = {{B}ulletin of the {S}eismological {S}ociety of {A}merica},
  volume = {107},
  numero = {1},
  pages = {308--318},
  ISSN = {0037-1106},
  year = {2017},
  DOI = {10.1785/0120160199},
  URL = {https://www.documentation.ird.fr/hor/fdi:010069453},
}