An earthquake that has a magnitude of 7.0 is considered a major earthquake. The largest earthquake that occured in the United States was located in Alaska. The largest earthquake that occured was in Chile in 1960. The greatest number of people that were killed in one earthquake was in the 1556 China earthquake. 830,000 people were killed.
Earthquakes cause volcanoes.
Earthquakes are weather related. Earthquakes release large amounts of energy . Not all large magnitude earthquakes result in great destruction and death. During an earthquake the ground is known to open up and sallow people.