Speaker
Description
During the SnT2023, Mulwa and Dindi (2023) presented case examples of systematic seismic events discrimination methods at KE-NDC. The results were subsequently published in Pure and Applied geophysics journal (see Mulwa, 2024 in PAGEOPH, https://doi.org/10.1007/s00024-024-03458-4). The NPE2024 entailed a request by the State of “Andlantis” for Expert Technical Analysis (ETA) of potentially CTBT-relevant event in the State of “Bezores”. Andlantis provided "CTBT Member State" with SHI data from her National Technical Means (NTM). At KE-NDC, seismic waveform data was subjected to analysis using SHI NDC-in-a-Box. Based on preliminary event location, the epicenter was at latitude 41.0872oN and longitude 27.9954oS. The origin time of the event was 20240114 06:19:36.36 (as per Andlantis time zone, UTC-2). Using this preliminary location, IDC REB product was screened at KE-NDC for possible triggering event. In order to determine compliance/non-compliance of CTBT by “Bezores”, the triggering event was subjected to the following discriminants: focal depth, mb:Ms and focal mechanism (Mulwa, 2024). Additional discriminant used was the frequency content of hydroacoustic signal at H10N. The results showed that “Bezores” had not violated the CTBT. Further discussions of the methodologies will be presented during the SnT2025.
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