EARTH SCIENCE
EARTHQUAKES
Question
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It measures nearby earthquakes.


It measures earthquakes total energy of earthquakes near or far


It tells us how dangerous an earthquake was


It measures the size of the largest wave.

Detailed explanation1: The moment magnitude scale was designed to produce a more accurate accounting of the total energy released by an earthquake, and it calculates the earthquakeâ€™s magnitude more accurately than other measuressuch as the Richter scale (ML), the bodywave scale (mb), and the surfacewave scale (MS).
Detailed explanation2: The moment magnitude scale is based on the total moment release of the earthquake. Moment is a product of the distance a fault moved and the force required to move it. It is derived from modeling recordings of the earthquake at multiple stations.
Detailed explanation3: The Richter scale measures the largest wiggle (amplitude) on the recording, but other magnitude scales measure different parts of the earthquake. The USGS currently reports earthquake magnitudes using the Moment Magnitude scale, though many other magnitudes are calculated for research and comparison purposes.
Detailed explanation4: The Richter magnitude of an earthquake is determined from the logarithm of the amplitude of waves recorded by seismographs.