Remote Sensing of Atmospheric CO and O₃ Anomalies before and after Two Yutian M_S7.3 Earthquakes

Table 1

Characteristics of atmospheric CO and O₃ anomalies associated with the Yutian M_S7.3 earthquakes on March 21, 2008, and February 12, 2014.

		2008 Yutian MS7.3 earthquake			2014 Yutian MS7.3 earthquake
	Method	Time	Spatial	Maximum anomalous amplitude	Time	Spatial	Maximum anomalous amplitude
CO anomalous characteristics		Feb	Extension along the NWW direction consistent with the fault zone		Mar	Linear distribution along the NE fault zone
		Feb	Extension along the NWW direction consistent with the fault zone	2.0	Mar	Double annular extremum and stretching along the NE direction	1.97
O3 anomalous characteristics		Feb	Double annular extremum and stretching along the EW direction	22.67	Mar	Linear distribution along the NE fault zone	31.71
		Feb	Double annular extremum and stretching along the EW direction	2.2	Mar	Linear distribution along the NE fault zone	2.18

Note: represents the difference method; represents the abnormal index method; the unit of the abnormal amplitude of CO is molecules/cm²; the unit of the abnormal amplitude of O₃ is DU.