2023-05-04T13:11:58.897162

2024-10-04T16:27:42.217201

375

375 × 375 meters

Global

Two times daily

global

NASA FIRMS. “VIIRS Active Fires.” Accessed through Global Forest Watch on [date]. www.globalforestwatch.org

VIIRS active fires

NASA

We acknowledge the use of data and imagery from LANCE FIRMS operated by the NASA/GSFC/Earth Science Data and Information System (ESDIS) with funding provided by NASA/HQ. [NASA Data & Information Policy](http://science.nasa.gov/earth-science/earth-science-data/data-information-policy/)

English

The VIIRS active fires data ([VNP14IMGT](https://earthdata.nasa.gov/earth-observation-data/near-real-time/firms/v1-vnp14imgt)) is the latest fire monitoring product to FIRMS (Fire Information for Resource Management System), which identifies global fire locations in near-real time. Information is collected from the Visible Infrared Imaging Radiometer Suite (VIIRS) sensor, and processed with a [fire detection algorithm](http://www.sciencedirect.com/science/article/pii/S0034425713004483) to flag active fires. Each dot on the map represents the center of a 375 meter pixel that has been flagged by the algorithm. <br><br>The VIIRS data replaces the active fires data from MODIS that was previously available on Global Forest Watch. The VIIRS data has higher spatial resolution (375-meter pixels vs. 1-kilometer pixels) which improves detection of smaller fires and provides a more reliable estimate of fire perimeters. The VIIRS data is also better calibrated to detect fires at night.<br><br>The active fires data is available to view and download for the past 24 hours, 48 hours, or 7 days. Older fire data will be available for download from the [NASA FIRMS](https://earthdata.nasa.gov/earth-observation-data/near-real-time/firms) website beginning in mid-2016.<br><br>Each fire alert has a confidence value of low, nominal, or high to help users gauge the quality of individual hotspot /fire pixels.

Displays fire alert data for the past 24 hours, 48 hours, 72 hours, or 7 days

Not all fires are detected. There are several reasons why VIIRS may not have detected a certain fire. The fire may have started and ended between satellite overpasses. The fire may have been too small or too cool to be detected in the 375-meter pixel. Cloud cover, heavy smoke, or tree canopy may completely obscure a fire.<br><br>It is not recommended to use active fire locations to estimate burned area due to spatial and temporal sampling issues.<br><br>When zoomed out, this data layer displays some degree of inaccuracy because the data points must be collapsed to be visible on a larger scale. Zoom in for greater detail.

Open per NASA data policy

Forest ChangeFires

Higher resolution data for fires

https://earthdata.nasa.gov/earth-observation-data/near-real-time/firms/viirs-i-band-active-fire-data

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