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This is a Quantitative Study study.

Estimating Moment Magnitudes of Moderate-to-Large Earthquakes in Western China Based on the Direct P Waves

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A novel algorithm estimates moment magnitudes quickly in western China earthquakes, suggesting enhanced emergency responses.

Moment magnitude estimates were obtained within 6 to 11 minutes after origin time, improving timeliness.
The algorithm demonstrated a standard deviation of about 0.1, indicating robust reliability compared to U.S. Geological Survey values.
Adaptive time windows and spatial averaging enhanced accuracy and stability despite variations in data quality and station distribution.
Comparative analysis with traditional magnitude scales confirmed the potential for this method to complement existing techniques.

Han et al. (2025) studied this question.

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