An earthquake with a magnitude of about 2.0 or less is called a microearthquake. It is not usually felt. The intensity of an earthquake with a magnitude of 2 is how many times greater than the intensity of an a standard earthquake?

On the magnitude scale used here, each increase of 1 means 10 times greater intensity. A magnitude-2 earthquake is 2 units above a standard magnitude-0 earthquake, so its intensity is 10 × 10 = 100 times greater. The correct choice is “100 times greater.”

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