Hong-Jia Chen

Hong-Jia Chen
National Central University | NCU · Department of Earth Sciences

Doctor of Philosophy

About

16
Publications
2,673
Reads
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69
Citations
Citations since 2017
13 Research Items
68 Citations
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Introduction
My research interests lie primarily in the field of earthquake precursors examining, seismo-electric modeling, and statistical seismology. My current works involve investigating the pre-seismic natures of telluric currents by using network topology and natural time analysis.
Additional affiliations
May 2020 - March 2021
National Central University
Position
  • PostDoc Position
Description
  • I am working on the self-potential and seismicity data of Tatun volcano, Taiwan.
May 2019 - April 2020
Chiba University
Position
  • PostDoc Position
Description
  • I, collaborated with Professor Katsumi Hattori, studied the topic "Connectivity Density and Criticality of Geoelectric Time Series of a Geoelectric Monitoring Network."
August 2018 - April 2019
National Central University
Position
  • PostDoc Position
Description
  • Earthquake precursors testing. Seismo-electromagnetic model. Geoelectric time series analysis. Earthquake probability forecasts.
Education
September 2013 - July 2018
National Central University
Field of study
  • Earth Sciences
September 2008 - July 2010
National Central University
Field of study
  • Earth Sciences
September 2004 - July 2008
National Central University
Field of study
  • Earth Sciences

Publications

Publications (16)
Article
Full-text available
The earthquake-alarm model developed by Chen and Chen [Nat. Hazards, in press] is investigated to validate its forecasting performances for the 2016/2/6, ML6.6 Meinong, Taiwan earthquake. This alarm model is based on anomalies of skewness and kurtosis of geoelectric fields. The parameters of the model, such as the detected range and the predicted t...
Article
Full-text available
Geoelectric self‐potential (SP) signals are sensitive to natural and anthropogenic factors. The SP spectral characteristics under the different factors in Taiwan were investigated and the SP spectral scalings were correlated with urbanization level, seismicity, and crustal deformation. The ambient SP noise models were first established by estimatin...
Article
Full-text available
We examine the precursory behavior of geoelectric signals before large earthquakes by means of a previously published algorithm including an alarm-based model and binary classification [H.-J. Chen, C.-C. Chen, Nat. Hazards 84, 877 (2016)]. The original method has been improved by removing a time parameter used for coarse-graining of earthquake occu...
Article
Full-text available
We introduce the first fully self-consistent numerical model combining seismic micro-ruptures, occurring within a generalized Burridge-Knopoff spring-block model, with the nucleation and propagation of electric charge pulses within a coupled mechano-electrokinetic system. This model provides a general theoretical framework for modeling and analyzin...
Article
Full-text available
The seismo-electrical coupling is critical to understand the mechanism of geoelectrical precursors to earthquakes. A novel seismo-electrical model, called Chen–Ouillon–Sornette (COS) model, has been developed by combining the Burridge–Knopoff spring-block system with the mechanisms of stress-activated charge carriers (i.e., electrons and holes) and...
Article
Full-text available
Geoelectric time series (TS) have long been studied for their potential for probabilistic earthquake forecasting, and a recent model (GEMSTIP) directly used the skewness and kurtosis of geoelectric TS to provide times of increased probability (TIPs) for earthquakes for several months in the future. We followed up on this work by applying the hidden...
Preprint
Full-text available
Geoelectric time series (TS) has long been studied for its potential for probabilistic earthquake forecasting, and a recent model (GEMSTIP) directly used the skewness and kurtosis of geoelectric TS to provide Time of Increased Probabilities (TIPs) for earthquakes in several months in future. We followed up on this work by applying the Hidden Markov...
Article
Full-text available
Some researchers have suggested that significant electromagnetic changes that can be detected prior to strong earthquakes are associated with the tectonics and subsurface structures beneath monitoring stations. Numerical simulation seems to support this phenomenon. However, to date, few field measurement data are available to address this issue. In...
Preprint
Full-text available
We introduce the first fully self-consistent model combining the seismic micro-ruptures occurring within a generalized Burridge-Knopoff spring-block model with the nucleation and propagation of electric charge pulses within a coupled mechano-electrokinetic system. This model provides a general theoretical framework for modeling and analyzing geoele...
Preprint
Full-text available
We examine the precursory behavior of geoelectric signals before large earthquakes by means of an algorithm including an alarm-based model and binary classification. This algorithm, introduced originally by Chen and Chen [Nat. Hazards., 84, 2016], is improved by removing a time parameter for coarse-graining of earthquake occurrences, as well as by...
Presentation
Full-text available
(This presentation is concerning my PhD thesis defense.) Abstract: Due to the lack of the physical mechanisms of rupture precursors, studies of earthquake precursors are still debated and skeptical. The purpose of this thesis is to verify correlations between pre-seismic anomalies of geoelectric fields and earthquakes. The thesis includes two main...
Poster
Full-text available
In rock fracture experiments, electromagnetic emission accompanying fracture is a common physical phenomenon. And in field observations, the anomalies of electromagnetic signals were found before large earthquakes [Chen and Chen, Nat. Hazards, 2016; Chen et al., Terr. Atmos. Ocean., 2017]. In this study, we conceptualize a completely novel model co...
Article
Full-text available
Geoelectric precursors are considered to be predictors of earthquakes, but this issue is still under debate. The objective of this research is to statistically test the relationship between the geoelectric system and earthquakes. We observed that anomalies of skewness and kurtosis of geoelectric fields may precede large earthquakes. Next, we develo...
Poster
Full-text available
In rock fracture experiments, electromagnetic emission accompanying fracture is a common physical phenomenon. And in field observations, the anomalies of electromagnetic signals were found before large earthquakes. Taiwan has abundant earthquakes. According to Central Weather Bureau of Taiwan, there are averagely 20 ML ≥ 5 earthquakes per year. Sin...
Article
Full-text available
The effect of tidal triggering on earthquake occurrence has been controversial for many years. This study considered earthquakes that occurred near Taiwan between 1973 and 2008. Because earthquake data are nonlinear and non-stationary, we applied the empirical mode decomposition (EMD) method to analyze the temporal variations in the number of daily...

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Projects

Project (1)
Project
We have been trying to develop a method to quantifying the relationship between the anomalies of geoelectric field statistics and earthquake occurrences. In addition, we have attempted to build a physics-based model to explain the relationship between geoelectric signals and earthquakes.