Exploring the relationship between soil degassing and seismic activity by continuous radon monitoring in the Longitudinal Valley of eastern Taiwan

Fu, Ching‐Chou; Yang, T. F.; Tsai, Min Chien; Lee, L. C.; Liu, T.K.; Walia, Vivek; Chen, C.H.; Chang, Wen‐Yen; Kumar, Arvind; Lai, Tzu-Hua

doi:10.1016/j.chemgeo.2016.12.042

Cited by 40 publications

(21 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…NAZI 120.32633 22.72824 -3.0 ± 2.0 -3.6 ± 1.7 -0.9 ± 4.6 NCKU 120.27581 22.93845 -26.1 ± 2.9 -8.5 ± 0.7 13.7 ± 5.7 NEMN 120.42008 22.90812 -27.5 ± 2.6 -30.2 ± 2.0 55.8 ± 4.6 PAOL 120.70287 23.10862 -19.9 ± 2.2 -13.0 ± 0.9 -8.0 ± 2.7 PTUN 120.45968 22.64985 1.2 ± 1.6 -3.2 ± 1.5 -1.0 ± 3.9 S012 120.48826 23.05947 -14.0 ± 2.4 1.9 ± 0.7 -1.3 ± 4.7 S106 120.33409 23.05079 -18.4 ± 1.4 9.4 ± 0.8 16.4 ± 5.7 S169 120.50331 22.94229 -17.9 ± 2.5 -6.6 ± 1.3 4.4 ± 3.5 S23R 120.60617 22.64498 -0.3 ± 1.9 -2.5 ± 1.0 -1.3 ± 4.2 SAME 120.29946 22.64763 1.0 ± 1.8 -3.2 ± 1.7 -2.0 ± 2.7 SAND 120.64064 22.71727 -2.9 ± 1.4 -2.6 ± 1. was also observed at several stations about two weeks before the Meinong earthquake in southern Taiwan (Fu et al 2017). From the high precision of continuous GPS data, an appreciable decrease in extension rate was also detected approximately 4 months before the Rueisuei earthquake (Fu et al 2016). The hypothesis of strain change prior to Meinong earthquakes in terms of cGPS baseline variation is similar to extension rate change prior to the 2013 Rueisuei event.…”

Section: Pre-seismic Baseline Variation Of Cgpsmentioning

confidence: 67%

“…In Taiwan, a decrease of creeping rate across the Chihshang fault before the 2003 M w 6.8 Chengkung earthquake was observed from creep-meters array (Jian-Cheng Lee, personal communication). A significant increase in soil-gas concentrations was recorded 2 months before the 2013 M L 6.4 Rueisuei earthquake in eastern Taiwan (Fu et al 2016). A significant increase of soil radon concentrations GS52 120.65472 23.03402 -34.4 ± 2.3 -11.8 ± 1.3 -25.4 ± 3.0 GS53 120.39831 22.83998 -11.6 ± 1.7 -21.7 ± 1.6 14.5 ± 3.3 GS55 120.60224 22.85069 -11.9 ± 1.7 2.7 ± 0.9 -10.2 ± 4.1 GS56 120.60173 22.70388 -0.6 ± 1.7 -2.8 ± 1.0 -3.4 ± 3.4 GS74 120.45980 22.93916 -17.6 ± 2.5 -15.0 ± 1.6 43.9 ± 5.1 GS75 120.49412 22.88556 -10.3 ± 2.1 -11.8 ± 1.…”

Section: Pre-seismic Baseline Variation Of Cgpsmentioning

confidence: 96%

See 1 more Smart Citation

Pre-seismic strain anomalies and coseismic deformation of Meinong earthquake from continuous GPS

Tsai¹,

Shin²,

Kuo³

2017

Terr. Atmos. Ocean. Sci.

View full text Add to dashboard Cite

High strain accumulation across the fold-and-thrust belt in SW Taiwan are revealed by the Continuous GPS (cGPS) from 2007 -2015. This high strain is generally accommodated by the major active structures in fold-and-thrust belt of western Foothills. In addition, the plastic deformation of mudstone in the Gutingkeng formation might play a crucial role for aseismic creeping. Furthermore, the distributed rightlateral shear zone, fault-related folding and aseismic creeping are also dominated from Lungchuan fault and Chishan fault to the north of Kaohsiung area. Based on distribution of coseismic uplift across the Lungchuan fault to the Tainan tableland, a clear evidence of multiple fault slips was triggered by the 2016 M w 6.4 Meinong earthquake at ~15 km. The surface coseismic deformation is mainly controlled by a fault-related folding structures connected to the shallow décollement around 5 -10 km depth, in which the moderate earthquakes locate in mid-crust could trigger slip along the weak décollement. The pre-seismic baseline variation of cGPS is observed in 8 baselines near the epicenter of the Meinong earthquake. The rate-slow-down anomalies of these baseline variation could be considered as a possible precursor of the Meinong earthquake.

show abstract

Section: Pre-seismic Baseline Variation Of Cgpsmentioning

confidence: 67%

Section: Pre-seismic Baseline Variation Of Cgpsmentioning

confidence: 96%

Pre-seismic strain anomalies and coseismic deformation of Meinong earthquake from continuous GPS

Tsai¹,

Shin²,

Kuo³

2017

Terr. Atmos. Ocean. Sci.

View full text Add to dashboard Cite

show abstract

“…In an ideal scenario, only those events having R E /R D ≤ 1 are considered for earthquake forecasting studies. In our case, all the stations are lying within ðR D Þ as proposed by [57] and adopted in numerous studies [14,18,22].…”

Section: Identification Of Radonmentioning

confidence: 99%

“…The rationale behind the selection of this flexible time window is to analyse the effect of whole aftershock sequence of the Wenchuan earthquake. The identified anomalous periods were further analysed using residual signal processing techniques to eliminate the regular filtering effect as indicated in numerous studies [14,22,59]. The residual Rn (dAðtÞ) is calculated via a relationship given as…”

Section: Identification Of Radonmentioning

confidence: 99%

See 1 more Smart Citation

Implication of Radon Monitoring for Earthquake Surveillance Using Statistical Techniques: A Case Study of Wenchuan Earthquake

et al. 2020

View full text Add to dashboard Cite

The seismotectonically induced changes in groundwater radon (Rn) are considered to be strong imputes for the surveillance of imminent major earthquakes. Groundwater facilitates the migration of soil gases as a result of tectonic stresses. In this regard, a radon time series is statistically analysed to identify the radon anomalies possibly induced by Wenchuan earthquake. The statistical analysis mainly involves the deterministic analysis of the Rn data and residual Rn analysis using a criterion x¯±2σ of anomaly selection having a confidence interval of 95%. The deterministic analysis reveals that the Rn time series follows a persistent trend 0.5≤H≤1 which confirms the absence of a chaotic regime. On the other hand, the residual Rn shows a notable upsurge straddling the time of the Wenchuan earthquake in the form of pre- and post earthquake changes at monitoring stations having RE/RD≤0.3. The residual Rn level passes the anomaly selection criterion x¯±2σ and is declared as a tectonically induced Rn anomaly. Contrary to this, the response of distant monitoring stations (RE/RD>0.3) to this particular earthquake further validates the link between Rn and earthquake activity. In a nutshell, the present study highlights the potential implications of earthquake-induced radon anomalies for earthquake prediction research.

show abstract

Continuous Monitoring of Fluid and Gas Geochemistry for Seismic Study in Taiwan

Lee

2018

Pre‐Earthquake Processes

View full text Add to dashboard Cite

Exploring the relationship between soil degassing and seismic activity by continuous radon monitoring in the Longitudinal Valley of eastern Taiwan

Cited by 40 publications

References 56 publications

Pre-seismic strain anomalies and coseismic deformation of Meinong earthquake from continuous GPS

Pre-seismic strain anomalies and coseismic deformation of Meinong earthquake from continuous GPS

Implication of Radon Monitoring for Earthquake Surveillance Using Statistical Techniques: A Case Study of Wenchuan Earthquake

Continuous Monitoring of Fluid and Gas Geochemistry for Seismic Study in Taiwan

Contact Info

Product

Resources

About