Mars's Grand Canyon, Valles Marineris, Found to Be Still Tectonically Active

New research, based on seismic data from NASA's InSight lander, indicates that Valles Marineris, the massive canyon system on Mars, remains tectonically active. The study, published in 'Nature Communications' on October 15, 2026, identified a marsquake occurring 12 to 25 miles beneath the canyon, triggered by rocks slipping along an ancient fault deep within the Martian crust. This finding suggests ongoing geological activity on the red planet, despite its lack of Earth-like tectonic plates.