How to Measure Earthquakes

Seismograph

Share: 

Rate this Article: 

Average: 3 (2 votes)

Wondering how earthquakes are measured? Seismologists have developed a new measurement of earthquake size, called the Moment Magnitude.

All earthquakes can now be compared on the same scale with the Moment Magnitude. Previously, the Richter scale was used, however, it is precise only for measuring earthquakes of a certain size and at a certain distance from a seismometer.

See the Moment Magnitude chart below.

Magnitude Effect
Less than 3 Micro
3–3.9 Minor
4–4.9 Light
5–5.9 Moderate
6–6.9 Strong
7–7.9 Major
8 or more Great

 

Leave a Comment

Keep Your New Garden Growing

keepgardengrowingcover.jpgTop 10 Veggies.
Almanac Editors Tips- water, feed, pest control, harvest
 

 

You will also be subscribed to our Almanac Companion Newsletter

solar_array.jpg

Solar Energy Production Today

304.50 kWh

Live data from the solar array at The Old Farmer's Almanac offices in Dublin, NH.