Discrimination of seismic event near the North Korean nuclear test site (January-March 2022) using multi-station P/S spectral ratios

Key Points

• Seismic events near the North Korean nuclear site were successfully discriminated based on spectral ratios, enhancing monitoring techniques.
• Key evidence indicates a significant differentiation observed through analysis of P/S spectral ratios over the January-March 2022 period.
• Multi-station assessment using P/S spectral ratios provided a method for more accurate event discrimination in the region.
• This highlights the need for enhanced monitoring of nuclear test sites, particularly to improve detection and assessment capabilities.