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Abstract
The abnormal radon exhalation from the earth crust, as a precursory phenomenon related to seismic events, is an important research topic [1, 2]. The radon exhalation is related to the variability of local meteorological parameters. In the present study, a continuous RTM 2200 / SARAD monitor was used to measure the time series of radon concentration in the soil and meteorological parameters. These measurements were made in 4 wells at EMHU-PUCP for two weeks with 15-minute cycles. The nature of these temporal variations was characterized by means of continuous wavelet transformation (CWT) [3], performing a spectral analysis in the time-frequency domain. Also, a correlation analysis was performed between the different time series. An analysis is made of the potential influence of ambient temperature on radon concentration measurements.
Keywords: Time series; wavelet transform; Radon.
References:
[1] Donner, R. V., Potirakis, S. M., Barbosa, S. M., Matos, J. A., Pereira, A. J., & Neves, L. J. (2015). Intrinsic vs. spurious long-range memory in high-frequency records of environmental radioactivity. The European Physical Journal Special Topics, 224(4), 741-762.
[2] Barbosa, S. M., Zafrir, H., Malik, U., & Piatibratova, O. (2010). Multiyear to daily radon variability from continuous monitoring at the Amram tunnel, southern Israel. Geophysical Journal International, 182(2), 829-842.
[3] Siino, M., Scudero, S., Cannelli, V., Piersanti, A., & D’Alessandro, A. (2019). Multiple seasonality in soil radon time series. Scientific reports, 9(1), 1-13.
