Tidal Resonance: How Sun and Moon Gravity May Trigger Slow Earthquakes
A new study in JGR Solid Earth suggests that gravitational tides from the Sun and Moon can trigger slow earthquakes through a resonance mechanism. Although these tidal stresses are minimal, comparable to a gentle hand press, they can nudge unstable fault lines into slipping when their timing matches the fault's natural response. This research provides a framework for understanding how minor forces can lead to significant seismic events, potentially aiding in the prediction of larger earthquakes.