Reconstructing the tsunami record in Tirúa, Central Chile beyond the historical record with quartz-based SAR-OSL

Subduction zone slip variability during the last millennium, south-central Chile

“…Instead, the fifth oldest sand bed (sand bed 7 in this study) at Quidico (modeled age range of 1445e1490 AD) precedes the historical tsunami record. An OSL dating study of the Tirúa sand sequence yielded a similar chronology to that reported in Ely et al (2014) for the youngest three sand beds (sands 1, 2, and 4 in this study), however the older sand beds yielded significantly older ages (Nentwig et al, 2015). In a comparison of the Quidico and Tirúa tsunami chronologies, Hong et al (2017) noted that the preservation of the 1835 tsunami and the absence of the 1575 tsunami differentiate the Quidico record from the Tirúa record.…”

Coastal boulder deposit as evidence of an ocean‐wide prehistoric tsunami originated on the Atacama Desert coast (northern Chile)

“…Some studies have focused on the geological record of the most recent events that have occurred during the last 60 years along the Chilean coast (Cisternas et al, 2000;Horton et al, 2011;Morton et al, 2011;Bahlburg & Spiske, 2012;Atwater et al, 2013;Garret et al, 2013;Ely et al, 2014;Kempf et al, 2015;Ar anguiz et al, 2016;Araya Cornejo & Carvajal, 2016;Bahlburg et al, 2018). Studies focused on identifying, dating and describing these events in the geological record during the Late Holocene are very scarce in northern Chile, and they have been mainly carried out in central and south Chile (Cisternas et al, 2005(Cisternas et al, , 2017Dura et al, 2014Dura et al, , 2017Garrett et al, 2015;Nentwig et al, 2015;Hong et al, 2016;Kempf et al, 2017). The low preservation potential of onshore sandy tsunami deposits along arid coasts, such as those of northern Chile, can partially justify this circumstance because they can be reworked by winds or eroded by flash-floods (Spiske et al, 2013a).…”

Paleotsunami record of the past 4300 years in the complex coastal lake system of Lake Cucao, Chiloé Island, south central Chile

“…According to damage reports, tsunamis damaged coastal towns in all but the CE 1737 63 earthquake. Sedimentological investigations produced evidence for tsunami inundation for all 64 four documented tsunamis in many coastal areas of Chile (Cisternas et Nentwig et al, 2015). In addition, six sites, Tirúa (Nentwig et al, 2018), Maullín 74 (Cisternas et al, 2005), Caulle (Atwater et al, 2013), Chucalén , Cocotué 75 (Cisternas et al, 2017) and Lake Huelde (Kempf et al, 2017) are known to have recorded 76 tsunami inundation before the earliest written reports of earthquake and tsunami damage in CE 77 1562 (Lomnitz, 2004) (Fig.…”