Stress distribution in the third subsidence belt is presented , with great amounts of data on hydraulic fracture orientation obtained from monitoring hydraulic fracturing , and the direction of the maximum principle stress is specified . The results indicate that the third subsidence belt extends over 1 500 km from north to south , and the direction of the maximum principle stress ranges from 55° NE to 75° NE , concentrated on 65° NE , showing a stable distribution of the direction of maximum stress . The monitoring data implies that the tectonic stress direction in third subsidence belt is the combined result of South Asia Plate and Philippine Plate .