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04-02-2015, 10:51 PM

can you provide me the material how FM radio detects earthquake??

jaseela123d · 23-03-2017, 03:14 PM

The possibility of detecting earthquakes (EQs) of the emitted microwaves when they fracture the rocks. The method is based on an experiment in which the emission of microwaves from the fracture of rocks in a laboratory was detected for the first time in the world. First, the method of calibration of microwave power emitted from experimental data is presented. We propose a microwave emission and propagation model for a satellite. An advantage of microwaves is that they penetrate Earth's ionosphere, unlike radio waves with frequencies lower than several tens of megahertz. The power received by a satellite receiver is calculated by assuming the parameters of a radiometer currently operating in orbit. The result indicates that a satellite receiver can detect microwave signals generated by an equalizer. Based on this result, we have attempted to detect some features associated with an actual EQ from the advanced microwave scanning radiometer data for the Earth observation system aboard the Aqua remote sensing satellite.

The JMA has two earthquake early warning schemes. One for National Meteorological and Hydrological Services and the other for the general public. When there is a P-wave detection of two or more of the 4,235 seismometers installed throughout Japan, the JMA automatically analyzes and predicts the approximate area of the epicenter of the earthquake. These approximate predictions allow the JMA to warn people in affected prefectures through television and radio if a strong shock is expected. Earthquake early warning has been created to help people minimize earthquake damage: People can shelter or move away from dangerous areas such as cliffs. Railroad workers use this warning to delay trains, and factory workers can use it to stop assembly lines before the jolts hit them.

The effectiveness of a warning depends on the position of the receiver. After receiving a warning, a person may have a few seconds to a minute or more to take action. Areas near the epicenter may experience severe earthquakes before any warning. Following the 2011 Tōhoku earthquake and tsunami, the early warning system, along with Japan's tsunami warning system, was considered effective. Although the tsunami killed more than 10,000 people, many more people would have lost their lives without the early warning system. In April 2011, the Chilean Undersecretary of Telecommunications revealed that they also hope to establish an earthquake-like early warning system

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