Image of the Day for June 5, 2026

In fire-prone ecosystems in Australia's Northern Territory, prescribed burns are lit to minimize the severity of fires later in the season.

Jun 05, 2026

In May and June of most years, NASA satellites typically begin to detect large numbers of wildland fires throughout the Top End and Arnhem Land regions of Australia’s Northern Territory. On some days, especially in the afternoon, the blazes can resemble sizable wildfires in satellite imagery, spreading widely and producing expansive smoke plumes.

That was the case when NASA's Aqua satellite acquired this image of smoke and fires on the afternoon of May 28, 2026. Often, however, fires burning in this area look smaller and less imposing. In the mornings just a few days earlier and later, for instance, NASA satellites detected little smoke despite observing many thermal anomalies, or hotspots, that indicated fire activity.

The pattern of burning, location, and timing are consistent with prescribed fires lit intentionally to manage the landscape. Land managers tend to light fires in the morning, and smoke builds over the course of the day. The process sometimes creates sizable plumes when there are updrafts and winds of moderate strength that carry smoke away from the fires, as happened on May 28 and again on June 2. The fires typically burn through the fire-adapted grasses, underbrush, and scattered trees in the region's tropical savanna ecosystems.

Over the past few decades, the region's land managers have combined deep-rooted Indigenous land management practices and modern technologies to establish large-scale landscape management programs such as the West Arnhem Land Fire Abatement project and Arnhem Land Fire Abatement. The goal of such efforts is to intentionally burn some of the savanna underbrush to create firebreaks and reduce fuel loads early in the dry season, reducing more destructive and emissions-intensive fires later in the season. The dry season generally begins in May and extends through September, according to Australia's Bureau of Meteorology.

While research is ongoing, there are signs that the prescribed burning efforts are having the intended effect. Analysis of satellite observations of the fires suggests that prescribed burning efforts have shifted fire activity from late to early in the dry season, leading to a reduction in high-intensity fires and emissions.

NASA Earth Observatory image by Michala Garrison, using MODIS data from NASA EOSDIS LANCE and GIBS/Worldview. Story by Adam Voiland.

• Ansell, J., et al. (2020) Contemporary Aboriginal savanna burning projects in Arnhem Land: a regional description and analysis of the fire management aspirations of Traditional Owners. International Journal of Wildland Fire, 29(5), 371–385.
• Arnhem Land Fire Abatement (2026) Our Projects. Accessed June 4, 2026.
• Carbon Market Institute (2026) West Arnhem Land Fire Abatement (WALFA) Project. Accessed June 4, 2026.
• Edwards, A., et al. (2021) Transforming fire management in northern Australia through successful implementation of savanna burning emissions reductions projects. Journal of Environmental Management, 290, 112568.
• Evans, J. & Russell-Smith, J. (2020) Delivering effective savanna fire management for defined biodiversity conservation outcomes: an Arnhem Land case study. International Journal of Wildland Fire, 29(5), 386-400.
• NASA Earthdata, Questions About Real-Time (RT) and Ultra Real-Time (URT) Active Fire Data. Accessed June 4, 2026.
• NASA Fire Information for Resource Management System (2026, May 28) Fires/Hotspots. Accessed June 4, 2026.
• Russell-Smith, J., et al. (2026) Incentivising savanna fire management for emissions reduction, biodiversity conservation and community livelihood outcomes. International Journal of Wildland Fire, 35(4), 26039.

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