Rossi-Forel scale

\ ¦rȯ|sēfəˈrel-, ¦rä| \

Definition of Rossi-Forel scale

: 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

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

History and Etymology for Rossi-Forel scale

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

Keep scrolling for more

Learn More about Rossi-Forel scale

Statistics for Rossi-Forel scale

Cite this Entry

“Rossi-Forel scale.” Dictionary, Merriam-Webster, Accessed 21 Sep. 2020.

Comments on Rossi-Forel scale

What made you want to look up Rossi-Forel scale? Please tell us where you read or heard it (including the quote, if possible).


Test Your Vocabulary

Homophone Quiz

  • three bears two of them look like theyre whispering to a third bear who looks chuffed to be the center of attention
  • In order to judge how people felt, the senator's office hired a firm to take a ______.
Spell It

Can you spell these 10 commonly misspelled words?


Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!