摘要
This work presents the analyses of earthquake magnitude scales and seismicity parameters across the Nubian-Eurasian Plate Boundary Region.We developed magnitude conversion models using three regression techniques(R2≈0.68)and implemented a tapered Gutenberg-Richter model with bootstrap uncertainty quantification.Our analysis yielded Mc=4.35,b-value=0.93(95%CI:0.74-1.09),a-value=6.19(95%CI:5.35-6.90),corner magnitude=8.69(95%CI:5.77-8.69),and maximum magnitude(Mmax)=7.24(95%CI:6.50-7.24).The tapered model provides superior fitting at higher magnitudes compared to the standard Gutenberg-Richter relationship,addressing a key limitation in seismic hazard characterization.The b-value below 1.0 indicates elevated potential for higher-magnitude events,while the substantial a-value suggests significant seismic productivity across the boundary.The relatively high Mc value points to limitations in detecting smaller earthquakes,particularly in less-instrumented areas of the boundary zone.The estimated Mmax and corner magnitude constrain the upper bound of potential earthquake magnitudes,critical for hazard assessments and engineering applications.While treating the region as a single seismotectonic unit was necessary given current data constraints,we acknowledge this approach’s limitations given the boundary’s diverse tectonic regimes.Future research should develop zone-specific parameters that account for distinct regional characteristics.Nevertheless,these region-wide parameters establish a valuable baseline framework for seismic hazard assessment,particularly useful where zone-specific data remain insufficient.
