339 Hotspots Detected in Indonesia in the Last 24 Hours (Tuesday, April 21, 2026)

Based on the SiPongi forest and land fire monitoring system of the Ministry of Environment and Forestry (KLHK), monitoring over the last 24 hours shows that 339 hotspots have been detected in Indonesia. This number of hotspots is 100 less than the previous period.

The data is the result of imagery from Terra/Aqua, SNPP, and NOAA satellites accessed on Tuesday (April 21, 2026) at 11.35 WIB. Of the 339 detected hotspots, 5 have a high hotspot confidence level, 328 are medium scale, and 6 are low scale.

Hotspot confidence levels are divided into 3 scales. The low scale ranges from 0 - 29, medium scale from 30 - 79, and high scale from 80 - 100. The higher the hotspot confidence level, the higher the possibility of forest and land fires occurring in a particular area.

(Read: Indonesia Has the Most Active Volcanoes in the World)

The most hotspots were detected in South Sulawesi with 44 hotspots. East Kalimantan ranks second with 41 hotspots. West Kalimantan is third with 31 hotspots.

21 hotspots were detected in South Sumatra, Southeast Sulawesi follows with 19 hotspots, and Central Java and South Kalimantan each have 17 detected hotspots.

A hotspot is a coordinate point in an area with a higher surface temperature than its surroundings, and does not represent the number of forest and land fire incidents.

However, a large number of clustered hotspots in an area indicates the occurrence of forest and land fires. This means that remote sensing satellite-detected hotspot data remains the most effective for monitoring forest and land fires over large areas.

(Read: Country with the Most Active Volcanoes in the World, Indonesia Ranks First)