Speaker
Description
The majority of the issues that have hindered West African National Data Centers (NDCs) ability to carry out complementary nuclear explosion monitoring (NEM) functions and fill critical research gaps are being gradually resolved through the utilization of International Monitoring System (IMS) data, International Data Centre (IDC) products and the Comprehensive Nuclear-Test-Ban Treaty Organization capacity building programmes. Our recent findings from improved complementary NEM using data from IMS/Auxillary stations (PS15, IS17, AS97, IS11, AS62, PS26, AS34, PS11, IA12, IS50 and HA10) covering fifteen years are presented in this research. Geotool, SeisComP and TDK PMCC software were used for data processing and analysis. Results from earthquake analysis (locations, magnitudes and depths) confirmed the recent rise in seismicity in the studied area by clearly identifying the alignment of earthquake epicenters connecting suture zones to coastal regions of West Africa. T phases, which are linked to underwater volcanic or seismic events, were identified from the hydroacoustic signals. Back azimuths and apparent velocities were also determined from the infrasound signals, which helped establish the direction of the events. We achieved a significant feat in this work by using the three waveform technologies of the Comprehensive Nuclear-Test-Ban Treaty to construct a detailed event chronology and bridged major research gaps in the study area.
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