Validation of seismic hazard curves using a calibrated 14 ka lacustrine record in the Eastern Alps, Austria.

ABSTRACT: Seismic hazard maps are crucial for earthquake mitigation and mostly rely on probabilistic seismic hazard analysis (PSHA). However, the practise and value of PSHA are under debate because objective testing procedures for seismic hazard maps are scarce. We present a lacustrine turbidite record revealing 44 earthquakes over the last ~ 14 ka and use it to test seismic hazard curves in southern Austria. We derive local seismic intensities for paleo-earthquakes by applying scaling relationships between the sedimentary imprint and seismic intensity of well-documented historical earthquakes. The last ~ 2.8 ka of the record agree with a Poissonian recurrence behaviour and therefore a constant hazard rate, which is the modelling choice for standard PSHA. The lacustrine data are consistent with the

SUBMITTER: Daxer C 

PROVIDER: S-EPMC9675742 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature