Abstract: Before the Ning'er M_S6.3 earthquake, the thermal infrared OLR field of Chuan-Dian region (Long.95°~110°, Lat.20°~35°) shows once remarkable short-term and imminent anomaly reinforcement phenomenon. This enhancing phenomenon has obvious difference from those occurred during seismically active and quiet period: during the active period, the pre-earthquake OLR field is positive depareure and the short-term enhancement is obviously great; during the quiet period, the OLR field is negative depareure and shows small fluctuation. The results have the enlightenment significance to the strong earthquake monitoring and prediction in the future using the satellite remote sensing long wave radiation information.

Key words: Ning'er M_S6.3 earthquake, Chuan-Dian region, OLR, Anomaly reinforcement