(noun) A shaking of the ground, caused by volcanic activity or movement around geologic faults.
"Opinions have caused more ills than the plague or earthquakes on this little globe of ours."
"It is always interesting to see people in dead earnest, from whatever cause, and earthquakes make everybody earnest."
"All Earthquakes and Disasters are warnings; there’s too much corruption in the world."
"The safest place to be during an earthquake would be in a stationary store."