Articles | Volume 26, issue 4
Research article
23 Oct 2019
Research article |  | 23 Oct 2019

Negentropy anomaly analysis of the borehole strain associated with the Ms 8.0 Wenchuan earthquake

Kaiguang Zhu, Zining Yu, Chengquan Chi, Mengxuan Fan, and Kaiyan Li

Related subject area

Subject: Time series, machine learning, networks, stochastic processes, extreme events | Topic: Solid earth, continental surface, biogeochemistry
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Cited articles

Agnew, D. C. and Wyatt, F. K.: The 1987 Superstition Hills earthquake sequence: strains and tilts at Pinon Flat Observatory, B. Seismol. Soc. Am., 79, 480–492, 1989. a
Akopian, S. T.: Open dissipative seismic systems and ensembles of strong earthquakes: energy balance and entropy funnels, Geophys. J. Int., 201, 1618–1641, 2015. a
Amoruso, A. and Crescentini, L.: Limits on earthquake nucleation and other pre-seismic phenomena from continuous strain in the near field of the 2009 L'Aquila earthquake, Geophys. Res. Lett., 37, L10307,, 2010. a
Canitano, A., Hsu, Y. J., Lee, H. M., Linde, A. T., and Sacks, S.: Near-field strain observations of the October 2013 Ruisui, Taiwan, earthquake: source parameters and limits of very short-term strain detection, Earth Planets Space, 67, 125,, 2015. a
Chen, H. J. E. A.: Testing the correlations between anomalies of statistical indexes of the geoelectric system and earthquakes, Nat. Hazards, 84, 877–895, 2016. a
Short summary
Negentropy anomalies of borehole strain associated with the Wenchuan earthquake are analysed. The cumulative anomalies are studied on both large and small scales. Through a comparison discussion, we compare the cumulative anomalies of different time periods and stations with those at the Guza station during the study period and preliminarily exclude meteorological factors. We suspect negentropy anomalies at the Guza station to have recorded abnormal changes related to the Wenchuan earthquake.