The observed variability of seismic dynamics in the Pacific Northwest ...

• Main Authors: Nekrasova, Anastasia, Kossobokov, Vladimir
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: GFZ German Research Centre for Geosciences 2023
• Subjects: Pacific; Kamchatka
• Online Access: https://dx.doi.org/10.57757/iugg23-0382; https://gfzpublic.gfz-potsdam.de/pubman/item/item_5016062

<!--!introduction!--> To gain new insight into patterns of earthquake activity in the Pacific Northwest we study regional seismic dynamics in terms of several moving averages. In particular, the variability of the Unified Scaling Law for Earthquakes (USLE) coefficients in 3D have been evaluated at the three separate seismic focal zones – Southern Kamchatka, Northern Kamchatka, and Commander segment of Aleutian arc. USLE states that the logarithm of expected annual number of earthquakes of magnitude M or larger in an area of linear dimension L follows within the magnitude range [M–,M+] the relationship logN(M,L)=A+B×(5−M)+C×logL, where A, B, C are empirical constants. Naturally, USLE compliments to a- and b-values of the Gutenberg-Richter relationship with C, an estimate of fractal dimension of epicentres at a given site. USLE allows for realistic rescaling seismic hazard to the size of exposure at risk and its scaling parameter η controls regional distribution of inter-event times. We considered ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ...