Question

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Explanation:

1. The Richter scale (or more broadly, a seismographic magnitude scale like the Moment Magnitude Scale) is the standard tool for measuring earthquake magnitude via seismographs.
2. Magnitude quantifies the total energy released at the earthquake's origin point.
3. Intensity describes the observable effects (shaking, damage) at specific locations, documented via observations.

Answer:

1. seismographic magnitude scale (e.g., Richter Scale / Moment Magnitude Scale)
2. total energy released
3. amount of shaking and damage