We just learned about the Seismogram.
Another part of earthquake science is the Richter Magnitude Scale.
We learned before about how seismic waves are waves of energy that move through the earth during an earthquake.
These waves are measured using seismograms, and a man named Charles Richter came up with numbered levels to use when talking about how powerful an earthquake was.
This is kind of like the Fujita scale for tornadoes, or the Saffir Simpson scale for hurricanes.
(from: wikipedia - richter magnitude scale)
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