Multiple earthquake magnitude scales exist alongside the Richter scale
Seismology utilizes multiple earthquake magnitude scales—such as moment magnitude, surface-wave magnitude, and local magnitude—alongside the traditional Richter scale to accurately quantify seismic events of varying sizes.
The retrieved literature consistently supports the fact that multiple magnitude scales (e.g., Mw, Ms, mb, ML, Mwg) exist and are actively studied, compared, and converted between in modern seismology.
Rajiv Kumar, R. S. Yadav, S. Castellaro. Regional Earthquake Magnitude Conversion Relations for the Himalayan Seismic Belt. 2020. https://doi.org/10.1785/0220200204
Paper 5 establishes regional earthquake magnitude conversion relations among different magnitude scales such as Mw, Ms, mb, ML, and MD.
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Ranjit Das, C. Meneses, Hua Wang. Seismic and GNSS strain-based probabilistic seismic hazard evaluation for northern Chile using DAS Magnitude Scale. 2025. https://doi.org/10.1186/s40677-024-00285-6
Paper 8 mentions the use of alternative magnitude metrics like the DAS Magnitude Scale alongside traditional scales.
P. Gasperini, B. Lolli. Comment on “A Seismic Moment Magnitude Scale” by Ranjit Das, Mukat Lal Sharma, Hans Raj Wason, Deepankar Choudhury, and Gabriel Gonzalez. 2024. https://doi.org/10.1785/0120230230
Paper 11 discusses how the moment magnitude scale Mw exists alongside older scales like Ms, ML, and mb.
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