Another scale is based on the physical size of the earthquake ... Another way to measure the strength of an earthquake is to use the observations of the people who experienced the earthquake, and the ...

Earthquake Magnitude Scale Magnitude Earthquake Effects Estimated Number Each Year 2.5 or less Usually not felt, but can be recorded by seismograph. Millions 2.5 to 5.4 Often felt, but only causes ...

Do we still use the Richter Scale to measure earthquakes? Magnitude is the most common measure of an earthquake. The magnitude is a measure of the source of the earthquake and its size.

(WHTM) – Residents along much of the East Coast felt shaking Friday morning as a 4.8 magnitude earthquake struck ... Beno Gutenberg — to measure the size of earthquakes occurring in southern ...