@article{fdi:010053602,
  title = {{N}ormal faulting during the {A}ugust 1989 earthquakes in {C}entral {A}far : sequential triggering and propagation of rupture along the {D}obi {G}raben},
  author = {{J}acques, {E}. and {K}idane, {T}. and {T}apponnier, {P}. and {M}anighetti, {I}. and {G}audemer, {Y}. and {M}eyer, {B}. and {R}uegg, {J}. {C}. and {A}udin, {L}aurence and {A}rmijo, {R}.},
  editor = {},
  language = {{ENG}},
  abstract = {{I}n {A}ugust 1989, an earthquake sequence including ten events with 6.3 >= {M} >= 5. 5 in the first two days produced widespread ground deformation in the {D}obi graben of central {A}far. {N}umerous surface breaks with complex geometry, including fresh scarplets with vertical throws up to 30 cm high and open fissures up to 30 cm wide, were observed. {C}oseismic slip incremented the deformation (normal faulting, block tilting, and counterclockwise rotation of basaltic slices) accumulated in the last 2 m.y. in the transfer zone between the {D}obi and {H}anle grabens. {B}y combining maps of surface ruptures, relative event relocations with the local {D}jibouti network, published focal mechanisms, and source sizes, we tentatively relate most of the main-shocks of the sequence to slip on individual faults. {T}he largest shocks at 11h16 on 20 {A}ugust 1989 ({M}-{S} 6.2) and at 1h09 on 21 {A}ugust 1989 ({M}-{S} 6.3) ruptured southern segments of the southwestern bounding fault of the graben. {A} dozen other faults also slipped along the edges of, and inside, the graben. {O}n average, triggered seismic faulting propagated about 35 km northwestward along the graben in about 20 hr. {S}lip on the main faults was coupled with slip on secondary antithetic faults branching from them at depth. {A}lthough the {D}obi earthquakes ruptured part of the fault array between the {A}sal rift (1978 sequence) and the {S}erdo region (1969 sequence), an approximately 50-km-long gap subsists along the {D}er'ela half-graben. {W}e infer the patterns of surface faulting in the {D}obi sequence, which coinvolved bookshelf-faulting about both horizontal and vertical axes, to typify the complexity of coseismic stress release in central {A}far and in other active zones of distributed extension (e.g., {I}celand, {A}bruzzi, {B}asin and {R}ange).},
  keywords = {},
  booktitle = {},
  journal = {{B}ulletin of the {S}eismological {S}ociety of {A}merica},
  volume = {101},
  numero = {3},
  pages = {994--1023},
  ISSN = {0037-1106},
  year = {2011},
  DOI = {10.1785/0120080317},
  URL = {https://www.documentation.ird.fr/hor/fdi:010053602},
}