EENSANE cross-correlations
Description
This dataset consists in ambient noise cross-correlations between permanent and temporary broadband seismic stations that operated in Eastern, Central and Northern Europe between 1999 and 2020.
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Steps to reproduce
Raw data consist of continuous ground motion records and come from broadband seismic stations that operated in Central, Northern and Eastern Europe between the years 1999 and 2020. Continuous vertical-component ground motion records are downloaded in 24-hour long traces, resampled to 5 sps and visually inspected to ensure the data do not exhibit anomalous notches or patterns due to instrument failure. Data is then cut in hour-long seismograms. Data with gaps larger than 10 seconds are discarded and smaller gaps are zero-padded. Instrument response, mean and trend are removed. A Butterworth filter with corner frequencies between 0.003Hz and 2.4Hz is applied. A continuous wavelet transform (CWT, Yang et al., 2020) is used to filter the high-amplitude signals, enhancing the background noise. Visual inspection is carried out again to ensure CWT was successful and no anomalous features were introduced. Spectral whitening with a waterlevel value of 60 dB relative to the amplitude of the spectrum is applied. Data is cross-correlated.
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Funding
Unitatea Executiva pentru Finantarea Invatamantului Superior, a Cercetarii, Dezvoltarii si Inovarii