On Oct 7 and 8, FY-4C satellite has successively detected two fire incidents in the northern and southern parts of the China-Mongolia border (hereinafter referred to as the 'northern fire' and 'southern fire').

Fire spot monitoring by FY-4C at 03:00 (UTC) on Oct 7 shows the northern fire at 115.77°E, 48.88°N (yellow arrow).

Fire area per minute monitoring shows the fire expanded quickly from 03:00 to 05:40 (UTC), where the maximum strength was at 05:10.

Fire spot map shows that the fire mainly spreads from northwest to southeast.

Fire spot monitoring by FY-4C at 03:50 (UTC) on Oct 8 shows the southern fire at 119.40°E, 46.87°N (yellow arrow).

Fire area and time-line monitoring shows the fire lasted from 03:50 on Oct 8 to 01:40 on Oct 9 (UTC), where the longest fire spot lasted for 05 hours 10 minutes.

Fire spot map shows that the longest continuous fire mainly appear in the central and southern parts of the burned area (a) and the fire mainly spreads from the center outward (b).