@article{fdi:010086430,
  title = {{G}lobal frequency of oceanic and continental supershear earthquakes},
  author = {{B}ao, {H}. and {X}u, {L}. {W}. and {M}eng, {L}. {S}. and {A}mpuero, {J}ean-{P}aul and {G}ao, {L}. and {Z}hang, {H}. {J}.},
  editor = {},
  language = {{ENG}},
  abstract = {{E}arthquakes are supershear when their rupture speed is faster than that of the seismic shear waves produced. {T}hese events are rare, but they can be highly destructive owing to the associated strong ground shaking, and understanding why they occur may provide insights into fault mechanics. {O}nly a few supershear earthquakes have been reported previously, most of which were continental. {H}ere we perform a systematic global search for supershear earthquakes by analysing seismic data from all large ({M}-w >= 6.7) shallow strike-slip earthquakes occurring between 2000 and 2020. {B}ased on the rupture speeds determined by slowness-enhanced back-projection, and the identification of {R}ayleigh {M}ach waves, we identify four oceanic earthquakes consistent with supershear events. {W}e find that at least 14.0% of large earthquakes during the study period were supershear, with oceanic events occurring as frequently as continental ones. {W}e further observe a wider range of stable rupture speeds during supershear events than predicted by two-dimensional fracture mechanics theory, which we attribute to the presence of fault damage zones or slip obliqueness. {T}he transition to and propagation of supershear earthquakes may be promoted in oceanic settings due to the thicker crustal seismogenic zones and the material contrast at oceanic-continental boundaries. {S}upershear earthquakes occur more frequently than previously thought, as suggested by the identification of four oceanic events from a global analysis of large shallow strike-slip earthquakes.},
  keywords = {},
  booktitle = {},
  journal = {{N}ature {G}eoscience},
  volume = {[{E}arly access]},
  numero = {},
  pages = {[24 p.]},
  ISSN = {1752-0894},
  year = {2022},
  DOI = {10.1038/s41561-022-01055-5},
  URL = {https://www.documentation.ird.fr/hor/fdi:010086430},
}