From a magnitude of 2, people at rest may feel the tremors of an earthquake, but from magnitude 3, the majority of the population will perceive them.
Imperceptible tremors
Tremors felt by people at rest
Threshold where tremors become perceptible to the majority of people
Tremors felt, but no damage
Tremors strongly felt, minor damage near the epicenter
Damage at the epicenter, depending on the quality of construction
Significant damage at the epicenter
Major damage at the epicenter and over several hundred kilometers
Total destruction at the epicenter and over several thousand kilometers