Nature research paper: Instantaneous tracking of earthquake growth with elastogravity signals
With the selected source parameters and STFs, we use the normal-mode approach described in a previous workto compute three-component synthetic waveforms in a spatial domain of about 20° around the source epicentre. The resulting seismometer responses are convolved with the STF of the corresponding synthetic event and multiplied by the scalar moment to obtain synthetic traces of acceleration sampled at 1 Hz at each station location. Finally, traces are bandpass-filtered between 2.
. Then, on the basis of the theoretical P-wave arrival time at each station for a given event, we set the amplitude of the seismograms to zero for. Note that PEGSNet does not perform P-wave triggering itself. Instead, it relies on theoretical P-wave arrivals. In a real-time scenario, any existing P-wave triggering algorithm can be used to set the switch on the corresponding stations whose data can then be passed to PEGSNet.
To limit the influence of very noisy traces and to suppress high amplitudes , we further clipped the resulting trace using a threshold of ±10 nm s= 10 earthquake at 315 s as found in the calculated database of noise-free synthetics. Amplitudes are finally scaled by 10 nm sto facilitate convergence of the optimizer, and at the same time, to preserve information about the relative amplitudes of the PEGS radiation pattern across the seismic network.
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