The Scripps Institution of Oceanography on Tuesday raised the attention level for two earthquake faults, saying they’re actually a single system that could produce devastating temblors affecting Tijuana to the Los Angeles region. If offshore segments of the Newport-Inglewood and Rose Canyon fault system ruptured, they could generate a magnitude 7.3 quake capable of damaging much of the Southern California coastline, according to the scientists at Scripps, which is part of UC San Diego.