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