Final answer:
The Modified Mercalli Intensity Scale is used to measure the 4. intensity of an earthquake.
Step-by-step explanation:
The Modified Mercali Intensity Scale is used to measure the 4. intensity of an earthquake.
The Modified Mercalli Intensity Scale, also known as the MMI Scale, measures the effects of an earthquake on the Earth's surface and human structures. It is a subjective scale that uses observations and descriptions of the damage caused by an earthquake to determine its intensity.
For example, an earthquake with a low intensity might only be felt by a few people, whereas an earthquake with a high intensity can cause significant damage to buildings and infrastructure.