It was the third major quake for Iran this year.

While the chances of a major quake are low, the consequences would be great.

I understand that one major quake and several smaller ones have occurred in the last few hours.

A major quake is to hit the areas around a part of the Mississippi river.

The scientists at the center argue about whether or not to go public with their prediction of a major quake.

There was a major quake in this region thirty years back.

Government scientists warn that there is a possibility of another major quake within the next 50 years.

It was the third major quake to hit Mexico in less than a month.

There have been no major quakes in Tehran since 1830.

These have produced major quakes throughout the history of the island.