הרצאת מועמד למשרת חוקר במכון הגיאולוגי Earthquake Early Warning System (EEWS) in Israel – Implementation of current and future technologies

As the Israeli EEWS, Trua’a, is in its initial stages, and as the Californian EEWS (ShakeAlert) is currently in its operational phase, I demonstrate implementation of one of its main algorithms, ElarmS, to the Israel region. I discuss the challenges facing its implementation and operation in Israel and provide new tools and approaches for implementing and assessing ElarmS, enabling to overcome the limitations of low seismicity rates in the region and evaluate the performance of ElarmS with the current national seismic network.

An additional research effort is done in the novel development of an array-based approach to mitigate the current and future EEWS challenges in Israel. Seismic arrays have long been used for seismological research. The coherent signal of a wave field passing through the array can be used to increase signal to noise ratio (SNR), and the differences in arrival times at each of the array nodes can be used to derive the directivity of the wave field signal (slowness vector). By using seismic arrays, more robust source and rupture propagation parameters can be obtained. However, seismic arrays are uncommon, and their use is hindered by the prohibitive cost of adding additional sensors to each station of a standard network. I present my development of a low-cost Microelectromechanical Systems (MEMS) Accelerometer Mini-Array. Using the proposed mini-arrays it is possible to rapidly estimate more reliable hypocentral locations by beam forming (FK-analysis) techniques, and potentially characterize the rupture dimensions for local and regional large earthquakes, accounting for finite-source effects.


תאריך 28/06/2017 10:30 11:45
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