Summary
Rapid and accurate characterization of earthquake sources is crucial for mitigating seismic hazards. In this study, based on 18000 scenario ruptures ranging from Mw 6.4 to Mw 8.3 and corresponding synthetic high-rate Global Navigation Satellite System (HR-GNSS) waveforms, we developed a multi-branch neural network framework, the Continental Large Earthquake Agile Respond (CLEAR), to simultaneously determine the magnitude and slip distributions. We apply CLEAR to recent large strike-slip events, including the 2021 Mw 7.4 Maduo earthquake and the 2023 Mw 7.8 and Mw 7.6 Turkey doublet. The model generally estimates the magnitudes successfully at 32 s with errors of less than 0.15, and predicts the slip distributions acceptably at 64 s, requiring only approximately 30 ms on a single CPU. With optimal azimuthal coverage of stations, the system is relatively robust to the number of stations and the time length of the received data.