1.   But the tremendous earthquakes they showed were somewhat implausible.

2.   Earthquakes are an unusual occurrence in England but are not totally unknown.

3.   Earthquakes here are rare and this has lulled people into a false sense of security .

4.   Minor earthquakes are relatively common.

5.   There was an earthquake about a week ago.

6.   Yet the Northridge earthquake was relatively small.

7.   If there is an earthquake, the electrical supply will be immediately cut off.

8.   Earthquakes are extremely difficult to predict.

9.   In both Japan and China, people have long believed that earthquakes can be forecast.