The expanded earthquake data will help scientists understand how swarms of earthquakes evolve and previously unknown temblors that precede major earthquakes.
In a new study, researchers from the California Institute of Technology and University of California, San Diego have uncovered nearly two million previously unidentified tiny earthquakes that happened between 2008 and 2017. That translates to roughly 495 earthquakes a day in Southern California, or an earthquake about every three minutes. An average person walking along the street wouldn't notice these tiny temblors, which range in magnitude between -2.0 and 1.7.
The template matching method has been used in seismology since about 2006, but it was mostly limited to analyzing small data sets for a couple weeks at time."The computational burden of using this method is heavy," said Zach Ross, lead researcher on the study."It requires big computers, which pretty much limited its usage to small chunks of data. When we started on this project, we wanted to apply this on a scale ...
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