What question did this study set out to answer?

To refine the method for estimating the Australian local magnitude (MLa) of earthquakes, minimizing biases.

June 20, 2026Open Access

Recommended Procedures for Local Magnitude Estimation for Australian Earthquakes

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Randomized trial demonstrates improved local magnitude estimates in Australian earthquakes, suggesting better seismic hazard assessments.

To refine the method for estimating the Australian local magnitude (MLa) of earthquakes, minimizing biases.
Analyzed waveforms of 862 confirmed earthquakes from August 2023 to August 2024.
Applied high-pass corner frequency filtering at 0.10 Hz, 0.50 Hz, and 0.75 Hz to improve signal quality.
Employed quality selection criteria targeting signal-to-noise ratios and contributing station metrics.
Mean network MLa estimates increased from 445 to 695 with 0.75 Hz filtering due to improved signal-to-noise ratios.
Prefiltering dampened background noise but resulted in decreased magnitude estimates.
Enhanced methods will provide better seismic hazard assessments in Australia.

Australia) et al. (2026) studied this question.

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