Rossi–Forel scale
The Rossi–Forel scale was one of the first seismic scales to represent earthquake intensities. Developed by Michele Stefano Conte de Rossi of Italy and François-Alphonse Forel of Switzerland during the late 19th century, it was used commonly for about two decades until the introduction of the Mercalli [intensity scale] in 1902.
The Rossi–Forel scale and/or its modifications is still used in some countries, such as the Philippines until 1996 when it was replaced by the PHIVOLCS earthquake intensity scale.