GPS mapping of San Andreas Fault may give researchers tip as to when it is ready to rupture
The San Andreas Fault line is among the most infamous and hazardous earthquake risk areas in America. There have been movies about the fault line and the area has been studied extensively. Researchers from the University of Hawaii said that the GPS mapping of the fault line could provide researchers with a clue regarding when the fault will be all set to rupture.
On Monday, the findings were published in Nature Geoscience journal. The fault spans along the Pacific coast in Northern California, via the Bay Area and into Southern California. The fault is the site of numerous most destructive earthquakes in America.
Some of the most famous quakes that have taken place near the fault include the devastating 1906 Great San Francisco earthquake and the 1989 Loma Prieta quake that left the Bay Area in ruins.
When the vertical motion of the fault was observed, scientists managed to key in on the earth’s movement while obstructing out other environmental factors.
Lead researcher Samuel Howell, said, “While the San Andreas GPS data has been publicly available for more than a decade, the vertical component of the measurements had largely been ignored in tectonic investigations because of difficulties in interpreting the noisy data”.
Howell added that with the help of this technique, they were able to break down the noisy signals, isolating a simple vertical motion pattern that intriguingly straddled the San Andreas fault.
The researchers mentioned that they found 125 mile-wide ‘lobes’ of uplift and subsidence, with some millimeters of motion per year, straddling the fault. They said that their earlier prediction has got confirmation through the GPS evidence.
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