Describe the scales that scientists use to measure the magnitude of an earthquake

There are two primary scales used to measure earthquakes: the Richter scale and the Mercalli scale. The Richter scale is most common in the United States, while worldwide, scientists rely on the Mercalli scale. The moment magnitude scale is another earthquake measurement scale used by some seismologists.

Explanation:

I hope that my answer has helped to answer your question. If you have any further questions please put them below.

Have a great rest of your day/night!

the ritcher scale the mercalli scale magnitude scale

blue

light-years

magnitude

these muscles maintain the blood pressure in the vessels. the smooth muscles are innervated by nerves of the autonomic nervous system. when the muscles contract, they cause vasoconstriction of the vessels and increase blood pressure. when the muscles relax, they enable vasodilation of the   blood vessels hence reduce blood pressure.