Ioualalen Mansour auteur aut IRD Monfret Tony auteur aut IRD Bethoux N. auteur aut IRD Chlieh Mohamed auteur aut IRD Adams G. P. auteur aut IRD Collot Jean-Yves auteur aut IRD Bustamante C. M. auteur aut IRD Chunga K. auteur aut IRD Navarrete E. auteur aut IRD Montenegro G. auteur aut IRD Gordillo G. S. auteur aut IRD text journalArticle eng text/pdf born digital access The North-Andean subduction zone generates recurrent tsunamigenic earthquakes. The seismicity is usually considered to be segmented because of different specific morphological features of the Nazca Plate driving the subduction motion. Most of the recent powerful earthquakes in the margin were located in its northern part. To the south, the region of the Gulf of Guayaquil, only (undocumented) three events in 1901, 1933 and 1953 were possibly powerful and tsunamigenic. Here we are interested in the tsunami signature due to local seismicity. Two realistic earthquake scenarios (M-w = 7 and M-w = 7.5) taking into account the hypothesized segmentation of the area are proposed. Their return period is supposed to be intra-centenary. Then, a larger magnitude unsegmented M-w = 8 scenario is computed (half-millennium return period). The interior of the Gulf of Guayaquil as well as the Santa Elena Peninsula are sheltered areas including numerous coastal infrastructures and the city of Guayaquil. It is predicted that potential flooding would occur at high tide only for both segmented and unsegmented scenarios in (1) south of Playas with however only a few centimeters of wave height and (2) Chanduy (a few meters). Both are important zones of coastal farms. specialized Tsunami Gulf of Guayaquil Local seismicity Return period EQUATEUR 066 35 4 361-378 2014 0025-3235 https://www.documentation.ird.fr/hor/fdi:010062992 10.1007/s11001-014-9225-9 0025-3235 [F B010062992] https://www.documentation.ird.fr/hor/fdi:010062992 https://www.documentation.ird.fr/intranet/publi/depot/2015-02-06/010062992.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2015-01-12 2021-04-15 fdi:010062992 fre