Rossi-Forel scale

noun

¦rȯ|sēfəˈrel-,

¦rä|

: an arbitrary numerical scale of intensity of seismic disturbances ranging from one for a barely perceptible tremor to 10 for an earthquake of the highest intensity

Word History

Etymology

after Michele Stefano De Rossi †1898 Italian geologist and François Alphonse Forel †1912 Swiss naturalist

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