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ISSN  2096-3955

CN  10-1502/P

Citation: Wang, Y. L., Xie, T., An, Y. R., Yue, C., Wang, J. Y., Yu, C., Yao, L., and Lu, J. (2019). Characteristics of the coseismic geomagnetic disturbances recorded during the 2008 M w 7.9 Wenchuan Earthquake and two unexplained problems. Earth Planet. Phys., 3(5), 435–443.doi: 10.26464/epp2019043

2019, 3(5): 435-443. doi: 10.26464/epp2019043


Characteristics of the coseismic geomagnetic disturbances recorded during the 2008 Mw 7.9 Wenchuan Earthquake and two unexplained problems


China Earthquake Networks Center, Beijing 100045, China


Institute of Geophysics, China Earthquake Administration, Beijing 100081, China


Earthquake Observatory of Dalian, Liaoning Province, Dalian 116012, China

Corresponding author: YaLi Wang,

Received Date: 2019-04-15
Web Publishing Date: 2019-09-01

Twenty-seven FHDZ-M15 combined geomagnetic observation systems (each of which is equipped with a fluxgate magnetometer and a proton magnetometer) had been installed in the China geomagnetic network before the 2008 Wenchuan earthquake, during which coseismic disturbances were recorded by 26 fluxgate magnetometer observatories. The geomagnetic disturbances have similar spatial and temporal patterns to seismic waves, except for various delays. Six proton magnetometer observatories recorded coseismic disturbances with very small amplitudes. In addition, fluxgate magnetometers registered large-amplitude disturbances that are likely to have included responses to seismic waves. However, two problems remain unresolved. First, why do these geomagnetic disturbances always arrive later than P waves? Second, why do the geomagnetic disturbances have spatial and temporal directivity similar to the main rupture direction of the earthquake? Solving these two problems may be crucial to find the mechanism responsible for generating these geomagnetic anomalies.

Key words: Wenchuan Earthquake, co-seismic disturbance, geomagnetic field, fluxgate magnetometer, proton magnetometer

Cha, N., Sun, Y. M., Yin, Y. N., and Wang, X. R. (2016). The geomagnetic coseismic effect of strong earthquake of Dalian Geomagnetic station in Liaoning. J. Dis. Prev. Reduct. (in Chinese) , 32(2), 28–31.

Eleman, F. (1966). The response of magnetic instruments to earthquake waves. J. Geomag. Geoelectr., 18(1), 43–72.

Gao, Y., X., Chen, X. F., Hu, H. S., Wen, J., Tang, J., and Fang, G. Q. (2014). Induced electromagnetic field by seismic waves in Earth’s magnetic field. J. Geophys. Res.: Solid Earth, 119(7), 5651–5682.

Gladychev, V., Baransky, L., Schekotov, A., Fedorov, E., Pokhotelov, O., Andreevsky, S., Rozhnoi, A., Khabazin, Y., Belyaev, G., Noda, Y. (2002). Some preliminary results of seismo-electromagnetic research at Complex Geophysical Observatory, Kamchatka. In M. Hayakawa, et al. (Eds.), Seismo Electromagnetics: Lithosphere-Atmosphere-Ionosphere Coupling (pp. 421-432). Tokyo: TERRAPUB.222

Honkura, Y., Matsushima, M., Oshiman, N., Tunçer, M. K., Bariş, Ş., Ito, A., Iio, Y., and Işikara, A. M. (2002). Small electric and magnetic signals observed before the arrival of seismic wave. Earth, Planets Space, 54(12), e9–e12.

Huang, Q. H., and Sobolev, G. A. (2002). Precursory seismicity changes associated with the Nemuro Peninsula earthquake, January 28, 2000. J. Asian Earth Sci., 21(2), 135–146.

Huang, Q. H. (2004). Application of electromagnetism in earthquake research. Oil Geophys. Prospect. (in Chinese) , 39(S1), 75–79, 84.

Iyemori, T., Kamei, T., Tanaka, Y., Takeda, M., Hashimoto, T., Araki, T., and Oshiman, N. (1996). Co-seismic geomagnetic variations observed at the 1995 Hyogoken-Nanbu earthquake. J. Geomag. Geoelectr., 48(8), 1059–1070.

Johnston, M. J. S. (1974). Preliminary results from a search for regional tectonomagnetic effects in California and western Nevada. Tectonophysics, 23(3), 267–275.

Johnston, M. J. S., Mueller, R. J., Ware, R. H., and Davis, P. M. (1984). Precision of geomagnetic field measurements in a tectonically active region. J. Geomag. Geoelectr., 36(13), 83–95.

Molchanov, O., Kulchitsky, A., and Hayakawa, M. (2002). ULF emission due to inductive seismo-electromagnetic effect. In M. Hayakawa, et al. (Eds.), Seismo Electromagnetics: Lithosphere-Atmosphere-Ionosphere Coupling (pp. 153-162). Tokyo: TERRAPUB.222

Nagao, H., Iyemori, T., Higuchi, T., and Araki, T. (2003). Lower mantle conductivity anomalies estimated from geomagnetic jerks. J. Geophys. Res.: Solid Earth, 108(B5), 2254.

Nagao, T., Orihara, Y., Yamaguchi, T., Takahashi, I., Hattori, K., Noda, Y., Sayanagi, K., and Uyeda, S. (2000). Co-seismic geoelectric potential changes observed in Japan. Geophys. Res. Lett., 27(10), 1535–1538.

Okubo, K., Takeuchi, N., Utsugi, M., Yumoto, K., and Sasai, Y. (2011). Direct magnetic signals from earthquake rupturing: Iwate-Miyagi earthquake of M 7.2. Japan. Earth Planet. Sci. Lett., 305(1-2), 65–72.

Park, S., Johnston, M. J. S., Madden, T. R., Morgan, F. D., and Morrison, H. F. (1993). Electromagnetic precursors to earthquakes in the Ulf band: a review of observations and mechanisms. Rev. Geophys., 31(2), 117–132.

Piil-Henriksen, J., Merayo, J. M. G., Nielsen, O. V., Petersen, H., Raagaard Petersen, J., and Primdahl, F. (1996). Digital detection and feedback fluxgate magnetometer. Meas. Sci. Technol., 7(6), 897–903.

Reid, H. F. (1914). The free and forced vibrations of a suspended magnet: 1 Theory . Terr. Atmos. Electr., 19(2), 57–72.

Ren, H. X., Huang, Q. H., and Chen, X. F. (2010a). Analytical regularization of the high-frequency instability problem in numerical simulation of seismoelectric wave-fields in multi-layered porous media. Chinese. J. Geophys. (in Chinese) , 53(3), 506–511.

Ren, H. X., Huang, Q. H., and Chen, X. F. (2010b). A new numerical technique for simulating the coupled seismic and electromagnetic waves in layered porous media. Earthq. Sci., 23(2), 167–176.

Ren, H. X., Chen, X. F., and Huang, Q. H. (2012). Numerical simulation of coseismic electromagnetic fields associated with seismic waves due to finite faulting in porous media. Geophys. J. Int., 188(3), 925–944.

Tang, J., Zhan, Y., Wang, L. F., Xu, J. L., Zhao, G. Z., Chen, X. B., Dong, Z. Y., Xiao, Q. B., Wang, J. J., … Xu, G. J. (2008). Coseismic signal associated with aftershock of the Ms 8.0 Wenchuan earthquake. Seismol. Geol. (in Chinese) , 30(3), 739–745.

Tang, J., Zhan, Y., Wang, L. F., Dong, Z. Y., Zhao, G. Z., and Xu, J. L. (2010). Electromagnetic coseismic effect associated with aftershock of Wenchuan Ms8.0 earthquake. Chinese J. Geophys.,(in Chinese) , 53(3), 526–534.

Xu, W. Y. (2003). Geomagnetism (pp. 221-287) (in Chinese). Beijing: Earthquake Publishing House.222

Zhao, B. Q., and Hao, Y. Q. (2015). Ionospheric and geomagnetic disturbances caused by the 2008 Wenchuan earthquake: a revisit. J. Geophys. Res.: Space Phys., 120(7), 5758–5777.


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Characteristics of the coseismic geomagnetic disturbances recorded during the 2008 Mw 7.9 Wenchuan Earthquake and two unexplained problems

YaLi Wang, Tao Xie, YanRu An, Chong Yue, JiuYang Wang, Chen Yu, Li Yao, Jun Lu