A small earthquake or tremor that occurs following a major one
The largest earthquake ever recorded by seismic instruments anywhere on the 
earth .... About 5% to 10% of earthquakes in California are followed by a larger 
one... [DOC] [TLE] Earthquake - Wikipedia [PAR] An earthquake is the perceptible shaking of the surface of the Earth, resulting 
from the sudden ... Tectonic earthquakes occur anywhere in the earth where 
there is sufficient ....