We present a brief review of the research work being carried out in India to detect and analyse g... more We present a brief review of the research work being carried out in India to detect and analyse geochemical precursors for earthquakes. Concentration changes of terrestrial helium, methane and radon-222 emanating from hydrothermal vents are monitored continuously and round the clock at three seismo-geochemical monitoring observatories. These field site laboratories were set up at different regions of the country having different geological settings to monitor the pre-seismic geochemical signatures. Several noteworthy geochemical anomalies were recorded over the past few years that occurred prior to some major earthquakes within India and its neighborhood. In this paper, we make a cross correlation study of geochemical time series data sets recorded at these observatories. We have applied nonlinear statistical techniques to the recorded geochemical data sets. The results show significant dissimilarity between time series data sets that were recorded during two geophysical states – se...
We present a brief review of the research work being carried out in India to detect and analyse g... more We present a brief review of the research work being carried out in India to detect and analyse geochemical precursors for earthquakes. Concentration changes of terrestrial helium, methane and radon-222 emanating from hydrothermal vents are monitored continuously and round the clock at three seismo-geochemical monitoring observatories. These field site laboratories were set up at different regions of the country having different geological settings to monitor the pre-seismic geochemical signatures. Several noteworthy geochemical anomalies were recorded over the past few years that occurred prior to some major earthquakes within India and its neighborhood. In this paper, we make a cross correlation study of geochemical time series data sets recorded at these observatories. We have applied nonlinear statistical techniques to the recorded geochemical data sets. The results show significant dissimilarity between time series data sets that were recorded during two geophysical states – se...
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Papers by Prasanta Sen