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slide     • 1. Measures Of Earthquakes   • 2. How do scientists
measure earthquakes?     • With a really big ruler? No, not
quite. There are two ways in which scientists quantify the size
of earthquakes: magnitude and intensity.     • Magnitude is a
measure of the amount of energy released during an earthquake,
and you've probably heard news reports about earthquake
magnitudes measured using the Richter scale. Something like,
&quot;A magnitude 7.3 earthquake struck Japan today. Details at
ten.&quot; Did you ever wonder why, if it's that important, they
just don't tell you right away?