A MINOR EARTHQUAKE measuring 3.6 on the Richter scale jolted an area about 30 miles south of Oklahoma City Thursday, the National Earthquake Information Center said. Other quakes were reported Thursday in the Philippines and near Indonesia's Sumatra island. No injuries were reported . . . POLICE IN NEW DELHI, Inida, fired bullets and tear gas Thursday to quell rioting Hindus and Moslems who fought each other with knives, stones and glass bottles. At least 12 people were injured, police said. A day earlier, the wave of religious violence sweeping the nation touched the capital for the first time when armed Sikh and Moslem mobs attacked Hindus and pillaged their houses, killing at least six people, police said.