Rapid earthquake impact assessment systems are critical for guiding emergency response, yet they face inherent limitations during the first hours following major seismic events. This research investigates how rupture modeling approaches corresponding to the different levels of knowledge and uncertainty for the rupture geometry affect the accuracy of post-earthquake rapid impact estimates. The rupture modeling approaches adopted in the impact assessments are as follows:
- Point-source approximation (rupture as a single point)
- Planar rupture model (using nodal plane mechanisms)
- Pre-calculated rupture (from GEM Foundation's global hazard and fault models)
- Complex rupture models (published finite-fault solutions)
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