The Shaking Layers project: Near-real time shaking intensity maps for New Zealand earthquakes: Project overview
DOI:
https://doi.org/10.5459/bnzsee.1688Abstract
Following a damaging earthquake, emergency managers and decision-makers require reliable shaking information to be able to make decisions and prioritise interventions. Until now, in New Zealand, these decisions needed to be made with incomplete geographical information, relying solely on observed data points from either strong-motion stations or felt reports. The New Zealand Shaking Layers project has been designed to fill that gap. Using the ShakeMap software, configured to satisfy New Zealand’s characteristics, a tool is now available to end-users that provides shaking intensity maps for Peak Ground Acceleration, Peak Ground Velocity, Modified Mercalli Intensity and spectral acceleration at different periods. The Shaking Layers tool covers the entire country, helping decision-makers make better-informed decisions. The maps are generated for magnitude 3.5 or above earthquakes in New Zealand and use strong-motion data from the GeoNet network, as well as intensity derived from felt report data, and fault rupture information when available. To ensure scientific robustness, the tool has been developed with the support of a Science Advisory Panel and has been designed with similar configuration as the updated 2022 National Seismic Hazard Model. Moreover, to ensure the tool is fit-for-purpose, it has been co-designed with an End-User Advisory Panel comprising emergency managers, response engineers, city councils, risk analysts, duty officers and Civil Defence, amongst others. This paper provides the project overview, as well as the tool’s main components and functionalities.
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