@article{fdi:010019281, title = {{I}nterseismic and coseismic motions in {GPS} series related to the {M}s 7.3. {J}uly 13, 1994, {M}alekula earthquake, central {N}ew {H}ebrides subduction zone}, author = {{C}almant, {S}t{\'e}phane and {P}elletier, {B}ernard and {P}illet, {R}obert and {R}{\'e}gnier, {M}arc and {L}ebellegard, {P}ierre and {M}aillard, {D}. and {T}aylor, {F}. and {B}evis, {M}. and {R}ecy, {J}acques}, editor = {}, language = {{ENG}}, abstract = {{O}n {J}uly 13, 1994, an earthquake {M}s = 7.3 occurred at {M}alekula, in the {N}ew {H}ebrides archipelago. {T}he {GPS} data collected across the {N}ew {H}ebrides trench between 1990 and 1996 were processed in order to separate the interseismic and coseismic motions from the drifts related to the convergence with the {A}ustralian plate. {T}he {GPS}-derived coseismic displacements at the {GPS} site in {M}alekula are 49 = 15 mm southward, 230 = 30 mm westward and 170 = 37 mm downward, when the {CMT}-derived displacements are 50 mm southward, 210 mm westward and 150 mm downward. {T}aking into account the interseismic strain accumulation (25 mm/yr at the source established from historical seismicity, 7.5 mm/yr at the {GPS} site), the strain-free convergence rate at {M}alekula is 49 = 3 mm/yr. {O}ther {GPS}-derived convergence rates are 95 = 1 mm/yr at {E}fate and 37 = 2 mm/yr at {S}anto. {T}hese rates imply a regional right-lateral motion between the {E}fate and the {S}anto-{M}alekula segments. {I}n contrast, the focal mechanism of the earthquake mostly indicates a lift-lateral motion. {T}herefore, we hypothesize that the earthquake is related to variations in the interplate coupling along the converging boundary of the {S}anto-{M}alekula segment. ({R}{\'e}sum{\'e} d'auteur)}, keywords = {{SEISME} ; {SUBDUCTION} ; {MARGE} {CONTINENTALE} ; {COMPRESSION} {TECTONIQUE} ; {CONTRAINTE} ; {EPICENTRE} ; {GPS} ; {VANUATU} ; {MALEKULA}}, booktitle = {}, journal = {{G}eophysical {R}esearch {L}etters}, volume = {24}, numero = {23}, pages = {3077--3080}, ISSN = {0094-8534}, year = {1997}, DOI = {10.1029/97{GL}02962}, URL = {https://www.documentation.ird.fr/hor/fdi:010019281}, }