The first scale for reporting earthquake intensity, introduced in 1883 by the geophysicists Michele Stefano Conte de Rossi (1834–98) of Italy and François-Alphonse Forel (1841–1912) of Switzerland, and based on scales each of them had devised independently in 1874 and 1871, respectively. It remained in widespread use until the introduction of the Mercalli scale in 1902 and it is still used in some countries. The Rossi–Forel scale has 10 levels: I microseismic shock; II extremely feeble shock; III very feeble shock; IV feeble shock; V shock of moderate intensity; VI fairly strong shock; VII strong shock; VIII very strong shock; IX extremely strong shock; X shock of extreme intensity.