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Lg Attenuation near the North Korean Border with China, Part II: Model Development from the 2006 Nuclear Explosion in North Korea

School of Ocean and Earth Science, Tongji University, 1239 Siping Road, Shanghai 200092, China kychun{at}tongji.edu.cn gary{at}core.yorku.ca

^* Now at Department of Physics, University of Toronto, 60 St. George Street, Toronto, Ontario M5S 1A7, Canada, chun@physics.utoronto.ca.

An underground nuclear explosion was set off on 9 October 2006 in North Korea. The event was recorded at near regional to regional distances over purely continental paths by a network of broadband seismographs located along the northern edge of the Korean Peninsula. The event provided the first window of opportunity to make a reliable measurement of Lg-wave attenuation in northernmost North Korea, where the regional phase propagation characteristics are poorly known. The results of our analysis show Q₀=317±14 and =0.343±0.024, in close agreement with the corresponding values obtained of late using a completely different methodology and an independent set of seismic recordings in an adjacent region to the northwest, in southern Jilin, and in Liaoning provinces in China.