Some scientists have discovered how to predict earthquakes frog. In 2009, a number of frogs in L'Aquila, Italy disappeared from the local pools, three days before the big quake.
The team, led by Friedemann Freund from NASA and Rachel Grant from the Open University UK hope their hypothesis that it can help biologists and geologists to work together to find out how animals know the signs of the earthquake.
Frog in L'Aquila is not the only animal that is behaving strangely before the quake. Some reports mention reptiles, amphibians, and fish also behave strangely before an earthquake occurs.
In 1975, in Haicheng, China, many people who saw the snake out of the nest, one month before the city was rocked by an earthquake. Movement of the snake is weird because these animals usually sleep longer in the middle of winter, and out at the freezing temperature suicides for this cold-blooded animals.
Ms. Grant, a biologist from the Open University, observed the colony of frogs in L'Aquila as part of his research. "It's very dramatic," he said. "96 frogs disappear within three days. After that I was contacted by NASA," he added.
Scientists from the U.S. space agency is studying the chemical changes that occur when rocks in the earth experienced a big tekakan. They also were investigating whether the change is related to the mass exodus of frogs.
Friedemann Freund geophysics expert said that the rocks in the earth's crust under great pressure, removing the particles. Particles released in the air when it reaches Earth's surface into the air molecules called ions. These chemical changes can affect the dissolved organic matter in the water and makes the material is toxic to animals that live in water. The mechanism is complex and scientists say the process needs to be examined more carefully.
But Dr Grant said this is the first mechanism as "evidence earthquake" that can be felt by the animal. Dr. Freund said the attitude of these animals can be one of a number of things that can be used as evidence of the earthquake. "Once we understand all these signals and see there are four or five clues that lead to the same thing, then we can expect something to happen," says Dr. Freund told BBC Nature