A Global Empirical Predictive Model for Arias Intensity, Cumulative Absolute Velocity and Significant Duration of Strong Ground Motions

Date: 4/25/2019

Time: 06:00 PM

Room: Grand Ballroom

Integral measures of ground motions and estimates of the duration of significant shaking at a site are used in a broad range of engineering seismology and earthquake engineering applications including, e.g., the assessment of slope stability, liquefaction potential and structural performance. We present in this contribution an empirical predictive model for Arias intensity, cumulative absolute velocity and significant duration of strong ground motions based on a global dataset of digital high-quality acceleration waveforms and carefully curated earthquake and station metadata. We complement the calibration dataset used in our previous studies with the recordings of recent major events worldwide. The new dataset comprises more than 2000 tri-axial records and allows predictions in the moment magnitude range [4.5;8] at distances within 150 km of the earthquake source, in seismically active regions characterized by shallow crustal seismicity. We compare our predictions with other empirical models as well as with theoretical expressions derived from earthquake source models

Presenting Author: Carlo Cauzzi

Authors