A Brief History of Magnitude

Magnitude Determination, Event Detectability, and Assessing the Effectiveness of Microseismic Monitoring Programs in Petroleum Applications

Richter(1935) developed the scale for describing the relative strengths of earthquakes in California, and related the amplitude of a waveform recorded with a particular instrument (a Wood-Anderson seismograph) at a given distance from an event to the strength of the event.

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