Probability-based PGA estimations using the double-lognormal distribution: Including site-specific seismic hazard analysis for four sites in Taiwan

Seismic Hazard Analysis Based on Fuzzy-Probabilistic Approach

“…Further, a probability to each fuzzy set has been prescribed based on studies of seismic zones in the area. According to the engineering judgment, it is customarily used the source-to-site distance threshold of 200 km [31]. All seismic zones with 200 km range have been considered in the source model.…”

“…A magnitude threshold (m 0 ) of 5.0 is selected. and a distance threshold (d 0 ) of 200 km are selected for this case study [31]. Figure 6 The probability paper for observed earthquakes in China, Yunnan Province…”

Evidence in support of seismic hazard following Poisson distribution

“…[20]: ln PGA = 6.74 + 0.859M − 1.8 ln(D + 25) + ε; σ ε = 0.57 (2) where PGA is in gal, source-to-site distance D is in km, and M denotes earthquake magnitude. (Because the example was used for demonstrating PSHA algorithms, the unit of earthquake magnitude was not specified in the Ref.…”

“…Given that earthquakes are not predictable [1,2], seismic hazard analysis has become one of the practical approaches for earthquake hazard mitigation [1,2]. But before introducing probabilistic seismic hazard analysis (PSHA), it is worth clarifying the definition of seismic hazard: rather than casualty or economic loss associated with earthquakes, seismic hazard refers to the annual rate of a given ground motion of exceedance, e.g., PGA > 0.1 g = 0.01 per year.…”

A first-order second-moment calculation for seismic hazard assessment with the consideration of uncertain magnitude conversion

“…5.2). Take seismic hazard studies for Taiwan as an example: a recent discussion pointed out that one assessment was hardly repeatable, owing to the involvements of excessive engineering judgments (Wang et al, 2012b). Figure 3 shows a flowchart summarizing this novel FOSM application to earthquake hazard analysis.…”