What is the Difference Between Similar But Different Things, Terms, and Objects

What is the Difference between Volcano, Tremor, Earthquake and Aftershock

Can you count the reasons behinds severe natural destructive impacts upon the earth? Volcano, Tremor, Earthquake and Aftershock are the names of some natural disasters that cause cruel damage of earth as well as people. These are called disasters, as they lead human beings towards greater loss both in terms of life, residence and finance.