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

Figure 2

Spatial distribution of CO concentration anomalies (molecules/cm²) before and after the Yutian earthquake on March 21, 2008. 1—Tekrick fracture; 2—Arerjin fracture; 3—Kangxiwa fracture; 4—Yulong Kashi fracture; 5—Guozhacuo fracture; 6—Tianshen Daban fracture; and 7—Longmucuo-Bangdacuo fracture. Red five-pointed star indicates the epicenter location.

(a) Spatial distribution of CO anomalies obtained by the difference method

(b) Spatial distribution of CO anomalies obtained by the anomaly index method