@article{fdi:010066173, title = {{A} mixed seismic-aseismic stress release episode in the {A}ndean subduction zone}, author = {{V}illegas-{L}anza, {J}. {C}. and {N}ocquet, {J}ean-{M}athieu and {R}olandone, {F}. and {V}all{\'e}e, {M}artin and {T}avera, {H}. and {B}ondoux, {F}rancis and {T}ran, {T}. and {M}artin, {X}avier and {C}hlieh, {M}ohamed}, editor = {}, language = {{ENG}}, abstract = {{I}n subduction zones, stress is released by earthquakes and transient aseismic slip. {T}he latter falls into two categories: slow slip and afterslip. {S}low-slip events emerge spontaneously during the interseismic phase, and show a progressive acceleration of slip with a negligible contribution of synchronous tremors or microseismicity to the energy, or moment release(1-12). {I}n contrast, afterslip occurs immediately after large and moderate earthquakes, decelerates over time, and releases between 20 and 400% of the moment released by the preceding earthquake(13-18). {H}ere we use seismic and {GPS} data to identify transient aseismic slip that does not fit into either of these categories. {W}e document a seismic-aseismic slip sequence which occurred at shallow depths along a weakly coupled part of the {A}ndean subduction zone(19) in northern {P}eru and lasted seven months. {T}he sequence generated several moderate earthquakes that together account for about 25% of the total moment released during the full sequence, equivalent to magnitude 6.7. {T}ransient slip immediately followed two of the earthquakes, with slip slowing at a logarithmic rate. {C}onsidered separately, the moment released by transient slip following the second earthquake was more than 1,000% of the moment released during the earthquake itself, a value incompatible with classical models of afterslip. {S}ynchronous seismic swarms and aseismic slipmay therefore definea stress-release process that is distinct from slow-slip events and afterslip.}, keywords = {{PEROU} ; {ANDES}}, booktitle = {}, journal = {{N}ature {G}eoscience}, volume = {9}, numero = {2}, pages = {150--154}, ISSN = {1752-0894}, year = {2016}, DOI = {10.1038/ngeo2620}, URL = {https://www.documentation.ird.fr/hor/fdi:010066173}, }