@article{fdi:010070268, title = {{I}nvestigating the {M}arch 28th 1875 and the {S}eptember 20th 1920 earthquakes/tsunamis of the {S}outhern {V}anuatu arc, offshore {L}oyalty {I}slands, {N}ew {C}aledonia}, author = {{I}oualalen, {M}ansour and {P}elletier, {B}ernard and {G}ordillo, {G}. {S}.}, editor = {}, language = {{ENG}}, abstract = {{N}ew {C}aledonia's {L}oyalty {I}slands are located in the southwest region of the {P}acific ocean in the highly seismogenic southern {V}anuatu subduction zone and therefore may be subject to devastating local tsunamis. {O}ver the past 150 years, two large tsunamis were triggered by major earthquakes on {M}arch 28th 1875 and {S}eptember 20th 1920. {I}n this study, we use historical observations of these tsunamis (mostly in the form of testimonials), earthquake scenarios, and tsunami modeling to derive the magnitudes of these earthquakes, as well as tsunami runup and inundation maps. {A}ssuming that these earthquakes were located on the interplate megathrust zone, the 1875 earthquake's magnitude was {M}(w)8.1-8.2 and the 1920 event's magnitude was {M}(w)7.5-7.8. {T}he tsunami damage inflicted on the {L}ifou and {M}are islands was approximately proportional to these magnitudes, with {M}are being less impacted due to favorable wave directivity. {D}amage at {O}uvea island may have varied irregularly with the magnitude due to the effects of resonance. {T}his study demonstrates that the quantitative characteristics of historical tsunamigenic earthquakes may be derived from qualitative estimates of tsunami runup.}, keywords = {{T}sunami ; {V}anuatu subduction zone ; 1875 and 1920 earthquakes ; {L}oyalty {I}slands ; {N}ew {C}aledonia ; {VANUATU} ; {PACIFIQUE} ; {LOYAUTE} ; {NOUVELLE} {CALEDONIE}}, booktitle = {}, journal = {{T}ectonophysics}, volume = {709}, numero = {}, pages = {20--38}, ISSN = {0040-1951}, year = {2017}, DOI = {10.1016/j.tecto.2017.05.006}, URL = {https://www.documentation.ird.fr/hor/fdi:010070268}, }