The question whether the preparation process of foreshocks and mainshocks is diierent from other earthquakes is of great interest with regard to earthquake predictability. We show that the most conspicuous properties of earthquake clustering can be explained without assuming any diierences in the initiation processes. In particular, the Gutenberg-Richter law as well as the Omori law for foresho...

The mainshock (MS) is often accompanied by a number of aftershocks (AS). existence AS may cause the seismic demand to be greater than MS. In order better evaluate impact AS, this paper takes RC columns as research object and performs incremental dynamic analysis (IDA) on actual recorded mainshock-aftershocks (MS-AS). Park–Ang model damage index are used quantify effect MS respectively. fragilit...

Due to low stiffness of braces after yielding, the structures with buckling-restrained braces (BRBs) experience high residual drifts during an earthquake, which can be intensified by aftershocks and causes considerable damages to structures. Also, due to poor distribution of stiffness, this problem is exacerbated for irregular structures. Recently, the yielding brace system (YBS) has been intro...

Seismically active fault systems may be in a state of self-organized criticality (SOC). Investigations of simple SOC models have suggested that earthquakes might be inherently unpredictable. In this paper, we analyze the question of predictability in a more complex and realistic SOC model, which consists of a spring-block system with transient creep characteristics. Additionally to the power la...

Ageing structures located in moderate to high seismicity regions are exposed multiple natural stressors during their lifetime. Large earthquake events coupled with environmental aggressive agents increase the progressive failure probability of these structures. The accumulated damage main event might be exacerbated by its following aftershocks. This result catastrophic structures, and consequen...

Abstract Moderate-to-large-magnitude earthquakes induce considerable short-to-medium-term increases in seismic hazard, due to the subsequent occurrence of aftershocks. Most studies on aftershock models focus their performance as part Operational Earthquake Forecasting (i.e., real- or near-real-time predictions ongoing sequences). Aftershock model validation a longer timescale is scarcely dealt ...

We study how a stress perturbation generated by a mainshock affects a population of faults obeying a rate-state friction law. Depending on the model parameters and on the initial state, the fault exhibits aftershocks, slow earthquakes, or decaying afterslip. We found several regimes with slip rate decaying as a power-law of time, with different characteristic times and exponents. The complexity...

Abstract One of the most seismically active regions in United States, located hundreds kilometers inland from nearest plate boundary, is Intermountain Seismic Belt (ISB). The 6 July 2017 M 5.8 earthquake occurred 11 km southeast Lincoln, Montana, within ISB. This was largest to rupture state Montana since 1959 7.3 Hebgen Lake earthquake. We use continuous seismic data University Network, Region...

ABSTRACT The epidemic-type aftershock sequence (ETAS) model is a powerful statistical to explain and forecast the spatiotemporal evolution of seismicity. However, its parameter estimation can be strongly biased by catalog deficiencies, particularly short-term incompleteness related missing events in phases high-seismic activity. Recent studies have shown that these fluctuations completeness mag...