Yin made the discovery by analyzing roughly 100 images supplied by THEMIS aboard the Odyssey orbiter and HiRise (High Resolution Imaging Science Experiment) camera aboard the Mars Reconnaissance Orbiter. He also cross-referenced his findings with research he has done in the Himalayas and Tibet.
“You don't see these features anywhere else on other planets in our solar system, other than Earth and Mars,” said Yin via the release.
The amount of distance the two plates dividing Mars’s 2,500 mile-long canyon system — its longest and deepest — Valles Marineris have moved (93 miles horizontally) is comparable to the San Andreas Fault in California, according to Yin. It also serves to answer the question of how Valles Marineris came to be — a question that has long stumped the scientific community.
As for whether Mars experiences quakes, as a result of the tectonic motion, he says he thinks it does. “I think the fault is probably still active, but not every day,” he said via the release, “It wakes up every once in a while, over a very long duration — perhaps every million years or more.”
However, Yin doubts that Mars has more than two plates. Yin’s findings are the cover story in this month’s issue of the journal Lithosphere.