Moment magnitude scale

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Notion

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Science and technology

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What Wikipedia says

The moment magnitude scale (MMS; denoted explicitly with Mw or Mwg and generally implied with use of a single M for magnitude) is a measure of an earthquake's magnitude ("size" or strength) based on its seismic moment. Mw was defined in a 1979 paper by Thomas C. Hanks and Hiroo Kanamori.

Excerpt from the Wikipedia article “Moment magnitude scale”, under the CC BY-SA 4.0 license. Read the article on Wikipedia