Advanced Search

Indexed by SCI、CA、РЖ、PA、CSA、ZR、etc .

Volume 22 Issue 5
Oct 2011
Turn off MathJax
Article Contents
Wenbin Shen, Dijin Wang, Cheinway Hwang. Anomalous Signals Prior to Wenchuan Earthquake Detected by Superconducting Gravimeter and Broadband Seismometers Records. Journal of Earth Science, 2011, 22(5): 640-640. doi: 10.1007/s12583-011-0215-4
Citation: Wenbin Shen, Dijin Wang, Cheinway Hwang. Anomalous Signals Prior to Wenchuan Earthquake Detected by Superconducting Gravimeter and Broadband Seismometers Records. Journal of Earth Science, 2011, 22(5): 640-640. doi: 10.1007/s12583-011-0215-4

Anomalous Signals Prior to Wenchuan Earthquake Detected by Superconducting Gravimeter and Broadband Seismometers Records

doi: 10.1007/s12583-011-0215-4
Funds:

the National Natural Science Foundation of China 40974015

the National Natural Science Foundation of China 40637034

the Research Program for Outstanding Doctoral Candidates of Wuhan University 2008-50

More Information
  • Corresponding author: Wenbin Shen, wbshen@sgg.whu.edu.cn
  • Received Date: 12 Mar 2011
  • Accepted Date: 15 Jun 2011
  • Publish Date: 01 May 2011
  • Using 1 Hz sampling records at one superconducting gravimeter (SG) station and 11 broadband seismometer stations, we found anomalous signals prior to the 2008 Wenchuan (汶川) earthquake event. The tides are removed from the original SG records to obtain the gravity residuals. Applying the Hilbert-Huang transform (HHT) and the wavelet analysis to the SG gravity residuals leads to time-frequency spectra, which suggests that there is an anomalous signal series around 39 h prior to the event. The period and the magnitude of the anomalous signal series are about 8 s and 3×10−8 m/s2 (3 μGal), respectively. In another aspect, applying HHT analysis technique to 11 records at broadband seismometer stations shows that most of them contain anomalous signals prior to the Wenchuan event, and the marginal spectra of 8 inland stations show an apparent characteristic of double peaks in anomalous days compared to the only one peak of the marginal spectra in quiet days. Preliminary investigations suggest that the anomalous signals prior to the earthquake are closely related to the low-frequency earthquake (LFE). We concluded that the SG data as well as the broadband seismometers records might be significant information sources in detecting the anomalous signals prior to large earthquakes.

     

  • loading
  • Afraimovich, E. L., Astafyeva, E. I., 2008. TEC Anomalies-Local TEC Changes prior to Earthquakes or TEC Response to Solar and Geomagnetic Activity Changes? Earth Planets Space, 60: 961-966 http://www.onacademic.com/detail/journal_1000036588740910_9113.html
    Crossley, D., Hinderer, J., 2008. Report of GGP Activities to Commission 3, Completing 10 Years for the Worldwide Network of Superconducting Gravimeters. In: Sideris, M. G., ed., Observing Our Changing Earth, IAG Symposia. University of Calgary, Calgary, Canada. 133: 511-521, doi: 10.1007/978-3-540-85426-5_61
    Daubechies, I., 1992. Ten Lectures on Wavelets. Society for Industrial and Applied Mathematics. Philadelphia, PA, USA
    Dautermann, T., Calais, E., Haase, J., et al., 2007. Investigation of Ionospheric Electron Content Variations before Earthquakes in Southern California, 2003-2004. J. Geophys. Res. , 112: B02106, doi: 10.1029/2006JB004447
    Foufoula-Georgiou, E., Kumar, P., 1994. Wavelets in Geophysics. Academic Press, San Diego, California
    Furuya, M., Okubo, S., Sun, W., et al., 2003. Spatiotemporal Gravity Changes at Miyakejima Volcano, Japan: Caldera

    10.1029/2002JB001989

    Goodkind, J. M., 1999. The Superconducting Gravimeter. Rev. Sci. Instrum. , 70(11): 4131-4152, doi: 10.1063/1.1150092
    Hu, X. G., Hao, X. G., 2008. The Short-Term Anomalies Detected by Broadband Seismographs before the May 12 Wenchuan Earthquake, Sichuan, China. Chinese J. Geophys. , 51(6): 1726-1734 (in Chinese with English Abstract) http://www.researchgate.net/publication/292265824_The_short-term_anomalies_detected_by_broadband_seismographs_before_the_May_12_Wenchuan_earthquake_Sichuan_China
    Hu, X. G., Hao, X. G., Xu, X. X., 2010. The Analysis of the Non-Typhoon-Induced Microseisms before the 2008 Wenchuan Earthquake. Chinese J. Geophys. , 53(12): 2875-2886, doi: 10.3969/j.issn.0001-5733.2010.12.01 (in Chinese with English Abstract)
    Huang, N. E., Shen, Z., Long, S. R., et al., 1998. The Empirical Mode Decomposition and the Hilbert Spectrum for Nonlinear and Non-Stationary Time Series Analysis. Proc. Roy. Soc. Lond. , A454(1971): 903-995, doi: 10.1098/rspa.1998.0193
    Huang, N. E., Wu, Z. H., 2008. A Review on Hilbert-Huang Transform: Method and Its Applications to Geophysical Studies. Reviews of Geophysics, 46(2): 1-23, RG2006, doi: 10.1029/2007RG000228
    Hwang, C., Kao, R., Cheng, C. C., et al., 2009. Results from Parallel Observations of Superconducting and Absolute Gravimeters and GPS at the Hsinchu Station of Global Geodynamics Project, Taiwan. J. Geophys. Res. , 114: B07406, doi: 10.1029/2008JB006195
    Ide, S., Shelly, D. R., Beroza, G. C., 2007a. Mechanism of Deep Low Frequency Earthquakes: Further Evidence that Deep Non-Volcanic Tremor is Generated by Shear Slip on the Plate Interface. Geophys. Res. Lett. 34(3): L03308, doi: 10.1029/2006GL028890
    Ide, S., Beroza, G. C., Shelly, D. R., et al., 2007b. A Scaling Law for Slow Earthquakes. Nature, 447(7140): 76-79, doi: 10.1038/nature05780
    Ihmle, P. F., Jordan, T. H., 1994. Teleseismic Search for Slow Precursors to Large Earthquakes. Science, 266(5190): 1547-1551, doi: 10.1126/science.266.5190.1547
    Imanishi, Y., Sato, T., Higashi, T., et al., 2004. A Network of Superconducting Gravimeters Detects Submicrogal Co seismic Gravity Changes. Science, 306(5695): 476-478, doi: 10.1126/science.1101875
    McGuire, J. J., Boettcher, M. S., Jordan, T. H., 2005. Foreshock Sequences and Short-Term Earthquake Predictability on East Pacific Rise Transform Faults. Nature, 434(7032): 457-461, doi: 10.1038/nature03377
    Nakamula, S., Takeo, M., 2010. Frequency Structure of Deep Low-Frequency Tremors Occurring in Western Shikoku Region, Japan. Geophys. J. Int. , 181(1): 406-416, doi: 10.1111/j.1365-246x.2010.04500.x
    Nawa, K., Suda, N., Yamada, I., et al., 2009. Coseismic Change and Precipitation Effect in Temporal Gravity Variation at Inuyama, Japan: A Case of the 2004 off the Kii Peninsula Earthquakes Observed with a Superconducting Gravimeter. J. Geodyn. , 48(1): 1-5, doi: 10.1016/j.jog.2009.01.006
    Rogers, G., Dragert, H., 2003. Episodic Tremor and Slip on the Cascadia Subduction Zone: The Chatter of Silent Slip. Science, 300(5627): 1942-1943, doi: 10.1126/science. 1084783
    Shelly, D. R., Beroza, G. C., Ide, S., et al., 2006. Low-Frequency Earthquakes in Shikoku, Japan and Their Relationship to Episodic Tremor and Slip. Nature, 442(7099): 188-191, doi: 10.1038/nature04931
    Tanaka, Y., Okubo, S., Machida, M., et al., 2001. First Detection of Absolute Gravity Change Caused by Earthquake. Geophys. Res. Lett. , 28(15): 2979-2981 doi: 10.1029/2000GL012590
    Toda, S., Lin, J., Meghraoui, M., et al., 2008. 12 May 2008 M = 7.9 Wenchuan, China, Earthquake Calculated to Increase Failure Stress and Seismicity Rate on Three Major Fault Systems. Geophys. Res. Lett. , 35: L17305, doi: 10.1029/2008GL034903
    Wenzel, H. G., 1996. The Nanogal Software: Earth Tide Data Processing Package ETERNA 3.30. Bull. d'Inf. Marees Terr. , 124: 9425-9439 http://www.eas.slu.edu/GGP/ETERNA34/MANUAL/ETERNA33.HTM
  • 加载中

Catalog

    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

    1. 本站搜索
    2. 百度学术搜索
    3. 万方数据库搜索
    4. CNKI搜索

    Figures(8)

    Article Metrics

    Article views(1084) PDF downloads(20) Cited by()
    Proportional views
    Related

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return