Mark Stirling, Michelle Fitzgerald, Bruce Shaw, Clarissa Ross
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New Magnitude–Area Scaling Relations for the New Zealand National Seismic Hazard Model 2022
We develop new magnitude–area scaling relations for application in the New Zealand National Seismic Hazard Model 2022 (NZ NSHM 2022) and future applications. A total of 18 published relations are selected, comprising the following tectonic and slip types: crustal strike-slip (seven relations), reverse (two relations), normal (two relations), subduction interface (five relations), and two dip-slip relations to augment the small number of available reverse and normal relations. The scaling relations are evaluated against an instrumental earthquake database flatfile, and scores are provided for each relation. Equations of the form Mw=logA+C are then used to develop mean and bounding relations for the suite of scaling relations. The final set of relations used in NZ NSHM 2022 is adjusted to be consistent with observations of major historical New Zealand earthquakes and U.S. Geological Survey practice. We also provide a second set of Mw=logA+C relations that are absent of these adjustments and so more directly reflect the results of our scoring of the published relations.
期刊介绍:
The Bulletin of the Seismological Society of America, commonly referred to as BSSA, (ISSN 0037-1106) is the premier journal of advanced research in earthquake seismology and related disciplines. It first appeared in 1911 and became a bimonthly in 1963. Each issue is composed of scientific papers on the various aspects of seismology, including investigation of specific earthquakes, theoretical and observational studies of seismic waves, inverse methods for determining the structure of the Earth or the dynamics of the earthquake source, seismometry, earthquake hazard and risk estimation, seismotectonics, and earthquake engineering. Special issues focus on important earthquakes or rapidly changing topics in seismology. BSSA is published by the Seismological Society of America.