A powerful 7.4-magnitude earthquake has struck northern Chile, causing rockslides and damage in nearby towns, seismologists and residents say. There were no immediate reports of casualties. The earthquake, which struck at 9:50 p.m. on Thursday, was centered near San Pedro de Atacama, a town roughly 165 miles (265 km) east of Antofagasta. The area is close to the border with Argentina and Bolivia. The U.S. Geological Survey (USGS) said the tremor measured 7.4 and struck about 72 miles (117 km) below the surface, making it a relatively deep earthquake. Chile’s seismological agency put the magnit…