The land disturbance product (DIST-ALERT) maps vegetation loss as well as any spectral variation outside a historical norm using Harmonized Landsat Sentinel-2 (HLS) scenes. Vegetation disturbance is defined as loss of vegetation percent cover relative to the minimum of the baseline, and is reported as the total reduction in vegetation percent cover. Generic disturbance is measured by the distance of the spectral reflectance of an observation from the baseline distribution. Both methods use a baseline of all cloud-free observations from the previous three years within a 31-day window. The dataset is produced as a part of the JPL OPERA project.Dataset documentationProduct Specification DocumentAlgorithm Theoretical Basis DocumentData visualization using Google Earth Engine Appshttps://glad.earthengine.app/view/dist-alertData DownloadNASA EarthData CatalogThe dataset has been updated from V0 to V1.2023 accuracy and area assessmentStrata and reference imagery for sample Related Projects: Global Land Disturbance mapping for JPL OPERA (Observational Products for End-Users from Remote Sensing Analysis) Related Publications: Pickens, A.H., Hansen, M.C., Song, Z., Poulson, A., Komarova, A., Baggett, A., Kerr, T., Mikus, A., Ortiz Dominguez, C., Tyukavina, A. & Lima, A. (2025) Rapid monitoring of global land change. Nature Communications, 16, 8948