Proceedings of the 12th International INQUA meeting on paleoseismology, active tectonic and archaeoseismology

region. Especially the Valdivia segment of the subduction zone has been extensively studied using a combination of different techniques that aim at identifying coastal evidence for coseismic elevation changes, tsunami inundation or evidence of seismic shaking at the bottom of a lake or fjord (e.g., Cisternas et al., 2005; Kempf et al., 2017;Moernaut et al., 2018; Kempf et al., 2020;Wils et al., 2020). Compilation of these multi-proxy studies revealed that 1960-like ruptures of the entire 1,000 km length of the Valdivia segment occurred on average once every ~300 years during the last two millennia (Wils et al., 2020). Although some of these paleoseismic records continuously cover longer time periods (~4000 years or more), they are separated by large distances (from north to south: Lago Calafquén (shaking), Lago Riñihue (shaking), Lago Huelde (tsunami), Lago Cucao (tsunami) and Aysén Fjord (shaking), Fig. 1), thus hampering qualitative and reliable inter-record correlations of earthquake evidence along the entire length of the Valdivia segment. As a result, it remains unclear whether this recurrence rate is persistent over longer timescales, which is crucial input for statistically valid and thus reliable seismic hazard assessments in the region. To accommodate this knowledge gap, we present a new long lacustrine sedimentary shaking record recently obtained in Lago Rupanco, located in the north-central part of the Valdivia subduction zone segment (Fig. 1). Although many of the analyses are still ongoing, numerous seismo-turbidites were already identified and we can already present some interesting first results and preliminary interpretations of this estimated ~6- 8,000 years long record of 1960- like earthquakes. Fig. 1: Location of paleoseismic sites along the Valdivia segment of the Chilean subduction zone where at least 2,000 year-long continuous earthquake records were already obtained (Lago Calafquén and Riñihue, Maullín, Lago Huelde and Cucao, Aysén Fjord), and Lago Rupanco, presented here.