Quality analysis of crustal tilt and strain observations in China's earthquakes in 2014

Zhi-yao, Chen; Lǖ, Pinji; Tang, Lei

doi:10.1016/j.geog.2015.12.007

Cited by 5 publications

(2 citation statements)

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“…The upward tilt represents the crustal tilt in the north-south direction, while the downward tilt indicates the crustal tilt in the east-west direction. Here tidal components (Chen et al, 2015;Yamamoto et al, 2004) are clearly observed from the original tilt records. Crustal tilt data exhibit characteristics of good-quality cavern tilt data with response to seismic waves and clear solidearth tidal signals (Fig.…”

Section: Characteristics Of Crustal Deformationmentioning

confidence: 88%

“…As a result of these observations, we suggest that carbon dioxide-leakage levels increase owing to fracture opening, potentially caused by changes in fault architecture and permeability structure of regions surrounding the faults. (Yang et al, 2019;Xiang et al, 2019) and the crustal tilt observation in cavern (Yamamoto et al, 2004;Chen et al, 2015) can be found in references. Eventually, we have examined measurements of data from Jan. 1, 2019 to Aug. 31, 2019, during which period both crustal tilt and carbon dioxide levels are simultaneously recorded.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

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Carbon Dioxide Leakages through Fault Zones: Potential Implications for the Long-term Integrity of Geological Storage Sites

Yang

Zhang

2021

Aerosol Air Qual. Res.

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Carbon sequestration has recently become more widely recognized as a potential means of reducing atmospheric carbon dioxide levels. Understanding the tectonic relationship of carbon dioxide discharges and the sealing behavior of faults is conducive for predicting the long-term integrity of geological storage formations. Of primary concern is the influence of crustal deformation on the carbon dioxide leakage through fault zones during large-scale underground injection. This paper examines a record of carbon dioxide leakage from a faulted, natural carbondioxide-rich formation, and investigates the crustal tilt in the fault zones. Temporal changes in the crustal tilt reveal pulses of carbon dioxide concentrations ranging from 537.7 up to 1317.1 ppm, and the mean level represents 890.2 ppm. Of particular interest is that each high-frequency pulse coincides with the onset of local solid-earth tide. We show a significant correlation between the crustal tilt magnitude and amount of carbon dioxide leakage. We suggest that carbon dioxide leakage levels increase owing to fracture opening, potentially caused by changes in fault architecture and permeability structure of regions surrounding the faults. Highlights:Carbon dioxide leakages vary with a periodicity controlled by the crustal deformation.Temporal changes in the crustal tilt reveal pulsing of carbon dioxide leakage levels.Carbon dioxide leakages increase as a cause of fracture opening.

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Section: Characteristics Of Crustal Deformationmentioning

confidence: 88%