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- W2510124834 abstract "During the 20th century, a series of devastating earthquakes occurred along the North AnatolianFault. These generally propagated westwards, such that the main fault segment beneath theMarmara Sea appears as a seismic gap. For the nearby megacity Istanbul, rapid seismic hazardassessment is currently of great importance. A key issue is how a strong earthquake in theMarmara Sea can be characterized reliably and rapidly using the seismic network currentlyoperating in this region. In order to investigate this issue, several scenario earthquakes on themain Marmara fault are simulated through dynamic modelling based on a 3-D structure model.The synthetic datasets are then used to reconstruct the source processes of the causal eventswith a recently developed iterative deconvolution and stacking method based on simplified 1-DEarth structure models. The results indicate that, by using certain apriori information aboutthe fault geometry and focal mechanism, the tempo-spatial slip patterns of the input scenarioscan be well resolved. If reasonable uncertainties are considered for the apriori information,the key source parameters, such as moment magnitude, fault size and slip centroid, can stillbe estimated reliably, while the detailed tempo-spatial rupture pattern may reveal significantvariations. To reduce the effect induced by employing the inaccurate event location and focalmechanism, a new approach for absolute source imaging is proposed and tested. We alsoinvestigate the performance of the new source imaging tool for near real-time source inversionunder the current network configuration in the Marmara Sea region. The results obtained aremeaningful particularly for developing the rapid earthquake response system for the megacityIstanbul" @default.
- W2510124834 created "2016-09-16" @default.
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- W2510124834 date "2015-12-18" @default.
- W2510124834 modified "2023-09-27" @default.
- W2510124834 title "Rapid kinematic finite-fault inversion for an Mw 7+ scenario earthquake in the Marmara Sea: An uncertainty study" @default.
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