Rossi–Forel scale
/ˌrɒsifəˈrɛl skɛɪl/Seismology
noun
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.