The correct answer is the Moment magnitude scale.An earthquake is the sudden release of strain energy in the Earths crust resulting in waves of shaking that radiate outwards from the earthquake source. An earthquake is the result of plate tectonic activities.A seismograph is the primary earthquake measuring instrument. Types of ScalesThe first widely-used method, the Richter scale, was developed by Charles F. Richter in 1934. It measures the strength of the earthquake by measuring the largest amplitude on the recording.The moment magnitude scale is based on the total moment release of the earthquake. It measures the size of an earthquake in terms of energy released. This scale is based on the seismic moment which is dependent on Earth's rigidity and the amount and area of slip on the fault planes.The Mercalli Intensity Scale measures the intensity of an earthquake by observing its effect on people, the environment, and the Earth's surface.Additional Information The Saffir-Simpson Hurricane is a Wind Scale. It is a rating system that classifies hurricanes based on their sustained wind speed.