A new study revealed, that a global seismic monitoring system based on the Global Positioning System (GPS) can provide more timely and accurate warnings than traditional seismic networks when strong earthquakes occur, and it can also reduce the frequency of false alerts.
According to the British newspaper “Daily Mail”, a team of researchers in the new study, which was published this month in the Bulletin of the American Seismological Society, analyzed new progress in developing a global earthquake warning system that measures measurements of GPS satellite receiving stations. When an earthquake strikes.
The system evaluates the size of the earthquake in a matter of seconds and issues alerts in less than two minutes from the first detection of ground movement.
Lead researcher Timothy Milburn, professor of geology at Central Washington University, said a GPS-based detection system can provide early and more accurate alerts than conventional seismic sensors distributed in tectonically active regions, which can be flooded with an initial wave of data. When seismic waves appear first.
“The problem is that when earthquakes get very large, seismic networks have traditionally had a very difficult time understanding what happened in the first minutes after the event,” Melbourne added.
“What you find even with a medium-sized earthquake is a very complex seismic effect,” Melburne said. “Seismic waves radiate into the ground, bounce back inside the Earth, and interact with structures, and it becomes really complicated to find out the source of the waves versus what is the effect of all the echoes in the crust.”
The GPS monitoring system, which measures the precise location of the receiver, does not have to deal with the entanglement of seismic waves, by measuring the amount of earthquake deformation of the Earth, which causes the position of the receivers to change.
The receivers send the signal in real time via the internet, cellular networks or satellites to the central system, which evaluates the shift within seconds and informs local authorities of the magnitude of the earthquake.