Nonlinear Processes in Geophysics
Nonlinear Processes in Geophysics
NPG
Articles | Volume 13, issue 3
Articles | Volume 13, issue 3
https://doi.org/10.5194/npg-13-255-2006
© Author(s) 2006. This work is licensed under
the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License.
Special issue:
https://doi.org/10.5194/npg-13-255-2006
© Author(s) 2006. This work is licensed under
the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License.
Articles | Volume 13, issue 3
03 Jul 2006
 | 03 Jul 2006

An attempt to find precursors in the ULF geomagnetic data by means of flicker noise spectroscopy

M. Hayakawa and S. F. Timashev

Abstract. The flicker noise spectroscopy which is a new phenomenological method for the retrieval of information contained in chaotic time signals, is based on the analysis of recognizable irregularities (pulse, jumps, and discontinuities of derivatives of various order). This method is applied to the ULF (ultra-low-frequency) data observed at Guam in 1992–1994, in order to study the temporal nonlinear behavior of the lithospheric activity prior to the large 1993 Guam earthquake (8 August 1993). We have found that the lithosphere must have exhibited the step-like discontinuous behaviors in the lithosphere 101, 78, 54, 31 and 8 days before the main shock. This kind of nonlinear temporal behavior can be tracked by means of our flicker noise spectroscopy.

How to cite. Hayakawa, M. and Timashev, S. F.: An attempt to find precursors in the ULF geomagnetic data by means of flicker noise spectroscopy, Nonlin. Processes Geophys., 13, 255–263, https://doi.org/10.5194/npg-13-255-2006, 2006.