411 REFERENCE · Wiktionary
Rossi-Forel scale
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Etymology
Developed by Michele Stefano Conte de Rossi of Italy and François-Alphonse Forel of Switzerland in the late 19th century.
Proper noun
1
An early seismic scale for indicating earthquake intensity.
en eponyms