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Detection of an 8-month preparatory phase of the 2023 Turkey earthquake

On February 6th, 2023, two devastating earthquakes caused widespread damage and tens of thousands of casualties in Türkiye and Syria. Using statistical and machine learning tools to analyze seismicity in the region, Topic 3 researchers reported an 8-month preparatory phase preceding the first mainshock. They found isolated spatiotemporal clusters of seismicity within 65 km of the future epicenter. Similar preparatory processes have already been documented in laboratory tests and numerical models of earthquake rupture. The results add to the evidence that at least some large earthquakes have a monitorable preparatory phase.