Phys.org  August 30, 2024 Earthquake precursors are ambiguous, but recent experimental studies suggest that robust warning signs may precede large seismic events in the short (day-to-months) term. An international team of researchers (USA – University of Alaska Fairbanks, Germany) showed that Ridgecrest sequence (California) and Anchorage earthquake (Alaska) were preceded by up to ~3 months of tectonic unrest on regional scales, as evidenced by abnormal low-magnitude seismicity spreading over the ~15-25% of Southern California and Southcentral Alaska. This precursory unrest had been discovered with an algorithm that integrates an innovative random forest machine learning approach and statistical features built from […]