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www.nonlin-processes-geophys.net/17/569/2010/
doi:10.5194/npg-17-569-2010
© Author(s) 2010. This work is distributed
under the Creative Commons Attribution 3.0 License.
Wavelet analysis of the seismograms for tsunami warning
1National Geophysical Research Institute (Council of Scientific & Industrial Research), Hyderabad-500007, India
2Gujarat Energy Research & Management Institute, Research, Innovation & Incubation Centre, Gandhinagar 382 007, India
Abstract. The complexity in the tsunami phenomenon makes the available warning systems not much effective in the practical situations. The problem arises due to the time lapsed in the data transfer, processing and modeling. The modeling and simulation needs the input fault geometry and mechanism of the earthquake. The estimation of these parameters and other aprior information increases the utilized time for making any warning. Here, the wavelet analysis is used to identify the tsunamigenesis of an earthquake. The frequency content of the seismogram in time scale domain is examined using wavelet transform. The energy content in high frequencies is calculated and gives a threshold for tsunami warnings. Only first few minutes of the seismograms of the earthquake events are used for quick estimation. The results for the earthquake events of Andaman Sumatra region and other historic events are promising.
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Citation: Chamoli, A., Swaroopa Rani, V., Srivastava, K., Srinagesh, D., and Dimri, V. P.: Wavelet analysis of the seismograms for tsunami warning, Nonlin. Processes Geophys., 17, 569-574, doi:10.5194/npg-17-569-2010, 2010. Bibtex EndNote Reference Manager XML
