Nothing short of a major earthquake could've opened that door.
We cannot wait for another major earthquake in California to address these issues.
Citizens will have to be part of the response in the next major earthquake.
This was the first major earthquake in America to be broadcast on live television.
Three other major earthquakes have occurred in 1804 and 1812.
At least three other major earthquakes were reported elsewhere today.
On February 3, 1703 a major earthquake struck the town.
Most areas of the earth are not vulnerable to major earthquakes.
There was a major earthquake during the 17th century which caused some damage.
Could this be a sign that a major earthquake was about to occur?