We investigate the initiation phase of 2014 M w 8.1 Iquique earthquake in northern Chile. In particular, we focus on month preceding mainshock, a time period known to exhibit an intensification seismic and aseismic activity region. The goal is estimate time-evolution partitioning slip during preparatory mainshock. To do so, develop Bayesian inversion scheme infer spatio-temporal evolution pre-s...

Conventional earthquake risk assessments use fragility and vulnerability models that are based on seismic demands from individual (mainshock) ground motions, implicitly assume a structure is intact before an hits. This study develops suite of more realistic state-dependent for wide range building taxonomies, leveraging state-of-the-art methods to account dynamic damage accumulation in structure...

Abstract An approximate 236‐year interval in major seismic activity near the southern Xianshuihe fault terminated on 5 September 2022 until a destructive M 6.8 Luding earthquake. The strike‐slip mainshock, accompanied by potent normal‐faulting aftershocks, fell short of previously anticipated 7+ event. Utilizing deep‐learning and source inversion techniques, we analyzed dense near‐field seismog...

Earthquakes are known to generate disturbances in the ionosphere. Such disturbances, referred as co-seismic ionospheric or ionoquakes, were previously reported for large earthquakes with magnitudes Mw≥ 6.6. This paper reports ionoquakes associated Ridgecrest of magnitude (Mw=6.4), that occurred on 4 July 2019 California, USA. The manifested total electron content (TEC) form traveling (TIDs) wit...

This study investigates the effects of earthquake types, magnitudes, and hysteretic behavior on the peak and residual ductility demands of inelastic single-degree-of-freedom systems and evaluates the effects of major aftershocks on the non-linear structural responses. An extensive dataset of real mainshock–aftershock sequences for Japanese earthquakes is developed. The constructed dataset is la...