NASA FIRMS active-fire detections (VIIRS)
Near-real-time satellite detections of active fires from the VIIRS instrument on the Suomi-NPP satellite. Each dot is a thermal anomaly, not a confirmed fire or its cause.
- Publisher
- NASA Fire Information for Resource Management System (FIRMS)
- What it measures
- Latitude, longitude, acquisition time, brightness, confidence and fire radiative power (FRP) of each detection, at about 375 m resolution.
- Update frequency
- The satellite passes roughly twice a day over the region; data appear a few hours after each pass.
- Coverage
- Global; we query a box covering Sumatra, Peninsular Malaysia and Borneo.
- How we use it
- We count detections of nominal or high confidence in three approximate source regions for the last 24 hours and the 24 hours before, anchored to the newest satellite pass, and plot them on the haze map.
- Limitations
- Thick smoke and cloud can hide fires, so counts can under-state the real situation. Detections show where heat is, not what caused it. Only two passes a day, so counts move in steps.
- Terms
- Free with a MAP_KEY; acknowledge NASA FIRMS.
- Official site
- https://firms.modaps.eosdis.nasa.gov
- API / docs
- https://firms.modaps.eosdis.nasa.gov/api/area/
- Our JSON endpoint
- https://haze.day/api/map/hotspots
Live example
6007 detections in our three source regions over the last 24 h (2515 in the 24 h before).
Singapore now · as at 10:00 SGT
Check your area →100 µg/m³ · Elevated (1-hour PM2.5, NEA official, worst region)