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Discrimination Between Tectonic and Anthropic Events in Targu-Jiu Quarry Region (Romania)
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 11th Congress of the Balkan Geophysical Society, Oct 2021, Volume 2021, p.1 - 5
Abstract
The Romanian Seismic Catalogue has been contaminated in the last period with events from anthropic sources, especially in the regions with active quarry activities.
In this paper, we chose as the study area the Targu-Jiu zone, located in Southern Carpathians, where the National Seismic Network (RSN) recorded both crustal events and quarry blasts.
For discrimination purposes, the events recorded in a 10-km radius circle around each quarry will be analysed through several methods, to properly identify the quarry blasts. Thus, statistical methods are used, as well as the cross-correlation technique for the recordings of Gura Zlata (GZR) seismic station.
In the first stage, a statistical analysis of the events recorded in the quarries area is performed, based on depth intervals, magnitude, working hours and days of the week. The spectrogram analyses are investigated with the DTK-GPMCC and DTK-DIVA extended CTBTO NDC-in-a-box packages developed by the CEA-DASE.
The events identified on the seismic recordings are used as templates for the cross-correlation method applied to the events recorded by the GZR for the 2010–2020 time interval.