Complex sentence: According to the U.S. Geological Survey, it is the most powerful quake ever recorded in Oklahoma, more powerful than a 5.5 magnitude earthquake that struck El Reno in 1952.
Split into simpler sentences: According to the U.S. Geological Survey, it is the most powerful quake ever recorded in Oklahoma. The previous record was a 5.5 magnitude earthquake that struck near the town of El Reno in 1952.