The number of quakes in Oklahoma has soared. In 2011, a string of powerful earthquakes struck near the town of Prague, Okla., part of a surge in seismic activity in the state. Geologists eventually linked the quakes to increased oil and natural-gas production in the area—specifically, to the practice of injecting wastewater from hydraulic fracturing, or fracking, into wells deep underground. Sandra Ladra, a Prague resident who was injured in the most severe of the quakes, brought a lawsuit against New Dominion LLC and other oil and gas companies that operate injection wells in the region, accusing the companies of engaging in “ultrahazardous activities” that led to her injuries. In July, the Oklahoma Supreme Court allowed the case to go forward. So now it’s up to the courts to decide whether oil and gas drillers should be held liable for the damages […]