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 ...

It was a magnitude 9.5 but larger earthquakes may be possible. Fortunately, large earthquakes are much less common than small ones. Here's a table describing the magnitudes of earthquakes, their ...