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Time changes in the geomagnetic transfer functions at Chengdu, Xichang and Chongqing Stations from May 2007 to December 2013

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doi: 10.11939/jass.2015.01.013
Authors:Gong Shaojing; Liu Shuangqing; Zhang Mingdong
Author Affiliations:Primary:
Earthquake Administration of Tianjin Municipality, Tianjin, China
Volume Title:Dizhen Xuebao Acta Seismologica Sinica
Source:Dizhen Xuebao = Acta Seismologica Sinica, 37(1), p.144-159. Publisher: Kexue Chubanshe, Beijing, China. ISSN: 0253-3782
Publication Date:2015
Note:In Chinese with English summary. 22 refs.; illus., incl. 4 tables
Summary:This paper discusses the method for computing geomagnetic transfer functions in detail and introduces the error formulae of the real and imaginary parts of complex transfer functions. And then the transfer functions A and B as well as Parkinson vectors are calculated by using the digital geomagnetic data recorded at the stations Chengdu, Xichang and Chongqing from May 2007 to December 2013. The results show that there are perceptible small bulges at Chengdu station before and after the 2008 Wenchuan MS8.0 earthquake, but the other two stations do not exhibit perceptible anomalies. Comparison with the results in the 1980s indicates that obvious long-term variations of the b value as well as the length and direction of Parkinson vectors are observed at the station Chengdu.
Subjects:Earthquake prediction; Earthquakes; Least-squares analysis; Magnetic field; Precursors; Regression analysis; Seismic networks; Seismicity; Statistical analysis; Time variations; Transfer functions; Wenchuan earthquake 2008; Asia; China; Far East; Sichuan China; Wenchuan China; Chengdu Station; Chongqing Station; Xichang Station
Coordinates:N311323 N311323 E1031948 E1031948
Record ID:788481-13
Copyright Information:GeoRef, Copyright 2021 American Geosciences Institute.
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