Journal articles
Detecting and locating volcanic tremors on the Klyuchevskoy group of volcanoes (Kamchatka) based on correlations of continuous seismic records
Abstract : We analyse daily cross-correlation computed from continuous records by permanent stations operating in vicinity of the Klyuchevskoy group of volcanoes (Kamchatka). Seismic waves generated by volcanic tremors are clearly seen on the cross-correlations between some pairs of stations as strong signals at frequencies between 0.2 and 2 Hz and with traveltimes typically shorter than those corresponding to interstation propagation. First, we develop a 2-D source-scanning algorithm based on summation of the envelops of cross-correlations to detect seismic tremors and to determine locations from which the strong seismic energy is continuously emitted. In an alternative approach, we explore the distinctive character of the cross-correlation waveforms corresponding to tremors emitted by different volcanoes and develop a phase-matching method for detecting volcanic tremors. Application of these methods allows us to detect and to distinguish tremors generated by the Klyuchevskoy and the Tolbachik, volcanoes and to monitor evolution of their intensity in time.
https://hal-insu.archives-ouvertes.fr/insu-03579368
Contributor : Nathalie Pothier Connect in order to contact the contributor
Submitted on : Friday, February 18, 2022 - 10:08:11 AM
Last modification on : Sunday, February 20, 2022 - 3:32:43 AM
Long-term archiving on: : Thursday, May 19, 2022 - 6:29:26 PM
Contributor : Nathalie Pothier Connect in order to contact the contributor
Submitted on : Friday, February 18, 2022 - 10:08:11 AM
Last modification on : Sunday, February 20, 2022 - 3:32:43 AM
Long-term archiving on: : Thursday, May 19, 2022 - 6:29:26 PM
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