Abstract: The data of CO and O₃ before and after the M_S7.3 earthquake of Yutian in Xinjiang on February 12, 2014 was extracted based on the AQUA AIRS sensor, and the relationship between data changes and seismic activity was discussed. The results of difference value method and anomaly index method showed that there are CO and O₃ reached the maximum anomaly in March after the earthquake, and the anomalous distribution of gas total column and seismogenic structure showed a linear NE distribution. The change in VMR values for CO and O₃ at different heights is consistent with this result. The CO and O₃ total column decreased in a short time before and after the earthquake, and the gas total column was the lowest in the month of the earthquake. The preliminary conclusion may be that the tail of the Altun fault caused the blockage of the earthquake zone to be locked under elastic compression during the movement of the SW, and the gas did not flow. The CO and O₃ anomalies are more due to the large release of underground gas caused by the Yutian earthquake, and secondly may be related to a series of chemical reactions in which the underground gas escapes in the atmosphere. The results indicate that geochemical information of CO and O₃ obtained by satellite hyperspectral remote sensing can be connected with earthquake, indicating potential application in monitoring and forecasting earthquake.

Key words: AIRS, carbon monoxide, ozone, earthquake, Yutian