Researchers used a novel technique to study the faults in the Japan Trench, the subduction zone where the magnitude 9.1 Tohoku-Oki earthquake struck in 2011. Their findings reveal a long history of large earthquakes in this fault zone, where they found multiple faults with evidence of more than 10 meters of slip during large earthquakes.
Click here for original story, Seismic biomarkers in Japan Trench fault zone reveal history of large earthquakes
Source: ScienceDaily