-
132 BCE
Around 132 A.D.
Chinese scientist Chang Heng invented the first seismoscope instrument that could register the occurrence of an earthquake -
1855
Luigi Dalmieri designed a mercury seismometer -
1874
The first modern intensity scale was produced. The credit goes to Michele de Rossi. -
1880
John Milne invented the first modern seismograph -
1881
Francois Forel of Switzerland publish a similar scale to Michele de Rossi -
1902
Italian volcanologist Giuseppe Mercalli created a twelve-degree scale of intensity -
1931
The modified Mercalli Intensity scale was develpoed by Harry Wood and Frank Neumann -
1935
The Richter Magnitude Scale was developed by Charles F Ritcher. It's expressed in decimals and whole numbers