11.   Among other evidence, the sudden acceleration of seismic waves at the center of the Earth implies that the inner core is solid.

12.   Another drawback is that to find such highly localized features, technicians must generate seismic waves by detonating small explosives.

13.   A detailed analysis of the data, Linde and Bilham found, suggests that the seismic waves from Landers had raised the pressure in the magma chamber.

14.   But the slightest shift in tone or phrasing on that sensitive foreign policy sets off seismic waves in Washington and in Asia.

15.   For example, seismic waves typically move more slowly through underground lava than solid rock, and faster through sandstone than shale.

16.   For three years, the seismometers recorded how seismic waves from hundreds of earthquakes worldwide bounced through the mantle.

17.   Imagine what would happen if a volleyball-playing Poseidon spiked a ball into an ocean of paint pots and unleashed a seismic wave of color.

18.   In many places the seismic waves from Landers seemed to have given the push to faults that would have ruptured eventually anyway.

19.   It would, they said, create a seismic wave of similar programs across the country, shifting students, money and attention from public to private schools.

20.   Researchers looked for changes in the shape and direction of the seismic waves to decipher changes in the materials through which the waves passed.