How to predict an earthquake

Washington: A new theory says ozone gas emitted from fracturing rocks could warn us of an impending earthquake. Scientists at the lab of Raul A Baragiola, professor of engineering physics at the University of Virginia, set up experiments to measure ozone produced by crushing rocks.
Different rocks produced different amounts of ozone. Some time prior to an earthquake, pressures begin to build in underground faults. These pressures fracture rocks, and presumably , would produce detectable ozone, said a University of Virginia statement. It occurred to Baragiola that if fracturing rocks create ozone, then ozone detectors might be used as warning devices in the same way that animal behavioural changes might be indicators of seismic activity. "Such an array, located away from areas with high levels of ground ozone, could be useful for giving early warning to earthquakes," said Baragoila.