The desert near the Salton Sea continue to tremble as a swarm of small earthquakes that started Wednesday continued into Thursday. The swarm slowed down Thursday, but at least four earthquakes of magnitude 3 or larger were recorded in the first seven hours of the day, according to the U.S. Geological Survey. The swarm is taking place in the Brawley seismic zone, a predominantly extensional tectonic zone that connects the southern terminus of the San Andreas Fault with the Imperial Fault in Southern California. The area has seen swarms in the past in which they remain active for as many...