Paleoseismology of the Chelungpu Fault during the past 1900 years

Section: Resultsmentioning

confidence: 99%

A Review of the Source Parameters of the 1999 Ms7.6 Chi-Chi, Taiwan, Earthquake

Wang

2006

“…1400 years. The age of this penultimate event is much older than ages for the penultimate events from the central part of the Chelungpu fault (e.g., 430 -150 yr BP; Chen et al 2004), and our single recurrence interval is significantly longer than the several-hundred-year recurrence time estimated by Chen et al (2004). Thus, the trench from the Fengyuan site has the oldest record for penultimate faulting and the longest recurrence interval along the Chelungpu fault so far.…”

Section: The Penultimate Faulting Event and Its Estimated Agementioning

confidence: 72%

Low-Angle Reverse Faulting During Two Earthquakes on the Northern Part of the Chelungpu Fault, Deduced From the Fengyuan Trench, Central Taiwan

Ôta¹,

Shishikura²,

Ichikawa³

et al. 2007

Self Cite

ABSTRACT1 Yokohama National University, Yokohama, Japan Terr. Atmos. Ocean. Sci., Vol. 18, No. 1, March 2007 56 for horizontal and ca. 5 m for vertical) than those (2.7 m for horizontal and ca. 2 m for vertical) of the 1999 earthquake. The age of the penultimate earthquake at the Fengyuan site is the oldest earthquake recorded among the known penultimate penultimate events on the Chelungpu fault so far and suggests that this part of the Chelungpu fault may be a fault segment independent of the central and southern parts of the fault.

“…supports the idea that the reoccurring ruptures on a fault can be described by a time-predictable model. The conclusion from paleoseismological investigations in Taiwan indicated that the behavior of rupture episodes at active faults adhere to a time-predictable model, based on a consistent slip rate level at which the earthquake occurs, such as the Chelungpu fault (Chen et al 2004(Chen et al , 2007 or the Longitudinal Valley fault (Yen et al 2008) etc. (as shown in Fig.…”

Section: The Paleoseismological Investigation In Taiwanmentioning

confidence: 95%

“…It provided data that prove recurrence intervals to be consistent with an assumed probability function. Based on the fault displacement of the Chelungpu fault (reported by Chen et al 2000Chen et al , 2004Chen et al , 2007 and the Longitudinal Valley (reported by Yen et al 2008) fault in Taiwan, the magnitude of a paleoearthquake can be estimated using the relationship of average displacement to the moment magnitude by Wells and Coppersmith (1994). As shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Time-predictable model application in probabilistic seismic hazard analysis of faults in Taiwan

Chang¹,

Loh²,

Jean³

2017

Given the probability distribution function relating to the recurrence interval and the occurrence time of the previous occurrence of a fault, a time-dependent model of a particular fault for seismic hazard assessment was developed that takes into account the active fault rupture cyclic characteristics during a particular lifetime up to the present time. The Gutenberg and Richter (1944) exponential frequency-magnitude relation uses to describe the earthquake recurrence rate for a regional source. It is a reference for developing a composite procedure modelled the occurrence rate for the large earthquake of a fault when the activity information is shortage. The time-dependent model was used to describe the fault characteristic behavior. The seismic hazards contribution from all sources, including both time-dependent and time-independent models, were then added together to obtain the annual total lifetime hazard curves. The effects of time-dependent and time-independent models of fault [e.g., Brownian passage time (BPT) and Poisson, respectively] in hazard calculations are also discussed. The proposed fault model result shows that the seismic demands of near fault areas are lower than the current hazard estimation where the time-dependent model was used on those faults, particularly, the elapsed time since the last event of the faults (such as the Chelungpu fault) are short.