@article{fdi:010094399, title = {{P}hysical properties controlling earthquake ruptures : two study cases along the {S}outh {A}merican {S}ubduction {Z}one}, author = {{L}eon-{R}ios, {S}. and {R}ietbrock, {A}. and {B}ie, {L}. {D}. and {B}eck, {S}. and {C}harvis, {P}hilippe and {C}omte, {D}. and {G}alve, {A}. and {M}eltzer, {A}. and {R}oecker, {S}. and {R}uiz, {M}. and {S}egovia, {M}.}, editor = {}, language = {{ENG}}, abstract = {{S}eismic velocity models were compared with coseismic slip distributions for two megathrust earthquakes that occurred along the {S}outh {A}merican subduction zone. {B}y analyzing the distribution of {V}p/{V}s ratios, we found that seismic anomalies with values higher or lower than the average coincide with the boundaries of the earthquake ruptures. {I}n contrast, the regions characterized by intermediate {V}p/{V}s values may represent a mechanical "sweet spot" where the physical properties create favorable conditions for sustained rupture propagation. {O}ur methodology, which combines the {V}p/{V}s distribution and the analysis of coseismic slip models, could reveal the rupture-prone regions and the likely magnitude of potential earthquakes, providing relevant information for seismic hazard assessment.}, keywords = {tomography ; seismology ; subduction zone ; seismic slip ; {EQUATEUR} ; {CHILI} ; {AMERIQUE} {DU} {SUD} ; {PEDERNALES} ; {ANTOFAGASTA}}, booktitle = {}, journal = {{G}eophysical {R}esearch {L}etters}, volume = {52}, numero = {14}, pages = {e2025{GL}114615 [12 p.]}, ISSN = {0094-8276}, year = {2025}, DOI = {10.1029/2025gl114615}, URL = {https://www.documentation.ird.fr/hor/fdi:010094399}, }