Meaning of Rossi–Forel scale in English:

Rossi–Forel scale

Pronunciation /ˌrɒsifəˈrɛl skɛɪl/

noun

Geology
  • A ten-point scale used to express the local intensity of an earthquake.

Origin

Late 19th century; earliest use found in Science. From the names of Michele Stefano Conte de Rossi, Italian geologist, and François-Alphonse Forel, Swiss physician and limnologist + scale.