Vegetation Disturbance Report
Malaysia Example
Executive Summary
↑ Back to topCritical vegetation loss detected: Satellite monitoring has identified 7 disturbance events at Malaysia Example with initial detection from October 13, 2025. Confirmed vegetation loss totals 13.68 ha (20.3% of site area), including any disturbances first detected in prior periods but confirmed during this monitoring window.
Disturbance Analysis
↑ Back to topOverall Impact
Cumulative Disturbance Map
Highlighted pixels show confirmed vegetation disturbances during the monitoring period (13.68 ha, 20.3% of site area), including disturbances first detected in previous periods (Satellite image from November 03, 2025).
Timeline
↑ Back to topClick on a date to view the satellite imagery for that event.
Temporal Analysis & Satellite Imagery
↑ Back to topSeptember 03, 2025: First DIST-ALERT granule
First available DIST-ALERT granule within the monitoring period
True Color Satellite Image
Disturbance Overlay
| Disturbance Type | Pixels | Area | |
|---|---|---|---|
| First Detection (<50% Loss) | 5 | 0.45 ha | |
| Provisional (<50% Loss) | 1 | 0.09 ha |
True Color Satellite Image
Disturbance Overlay
| Disturbance Type | Pixels | Area | |
|---|---|---|---|
| First Detection (<50% Loss) | 4 | 0.36 ha | |
| Provisional (<50% Loss) | 61 | 5.49 ha | |
| Confirmed (<50% Loss) | 2 | 0.18 ha | |
| Provisional (≥50% Loss) | 33 | 2.97 ha |
True Color Satellite Image
Disturbance Overlay
| Disturbance Type | Pixels | Area | |
|---|---|---|---|
| First Detection (<50% Loss) | 53 | 4.77 ha | |
| Provisional (<50% Loss) | 50 | 4.50 ha | |
| Confirmed (<50% Loss) | 2 | 0.18 ha | |
| Provisional (≥50% Loss) | 11 | 0.99 ha | |
| Confirmed (≥50% Loss) | 37 | 3.33 ha |
True Color Satellite Image
Disturbance Overlay
| Disturbance Type | Pixels | Area | |
|---|---|---|---|
| First Detection (<50% Loss) | 31 | 2.79 ha | |
| Provisional (<50% Loss) | 53 | 4.77 ha | |
| Confirmed (<50% Loss) | 22 | 1.98 ha | |
| Provisional (≥50% Loss) | 5 | 0.45 ha | |
| Confirmed (≥50% Loss) | 45 | 4.05 ha |
True Color Satellite Image
Disturbance Overlay
| Disturbance Type | Pixels | Area | |
|---|---|---|---|
| First Detection (<50% Loss) | 19 | 1.71 ha | |
| Provisional (<50% Loss) | 50 | 4.50 ha | |
| Confirmed (<50% Loss) | 28 | 2.52 ha | |
| First Detection (≥50% Loss) | 2 | 0.18 ha | |
| Provisional (≥50% Loss) | 10 | 0.90 ha | |
| Confirmed (≥50% Loss) | 61 | 5.49 ha |
November 17, 2025: Disturbance 5
1 month, 4 days after initial disturbance
True Color Satellite Image
Disturbance Overlay
| Disturbance Type | Pixels | Area | |
|---|---|---|---|
| First Detection (<50% Loss) | 18 | 1.62 ha | |
| Provisional (<50% Loss) | 37 | 3.33 ha | |
| Confirmed (<50% Loss) | 38 | 3.42 ha | |
| First Detection (≥50% Loss) | 1 | 0.09 ha | |
| Provisional (≥50% Loss) | 5 | 0.45 ha | |
| Confirmed (≥50% Loss) | 76 | 6.84 ha |
November 28, 2025: Disturbance 6
1 month, 15 days after initial disturbance
True Color Satellite Image
Disturbance Overlay
| Disturbance Type | Pixels | Area | |
|---|---|---|---|
| First Detection (<50% Loss) | 15 | 1.35 ha | |
| Provisional (<50% Loss) | 32 | 2.88 ha | |
| Confirmed (<50% Loss) | 40 | 3.60 ha | |
| First Detection (≥50% Loss) | 1 | 0.09 ha | |
| Provisional (≥50% Loss) | 1 | 0.09 ha | |
| Confirmed (≥50% Loss) | 89 | 8.01 ha |
December 07, 2025: Disturbance 7
1 month, 24 days after initial disturbance
True Color Satellite Image
Disturbance Overlay
| Disturbance Type | Pixels | Area | |
|---|---|---|---|
| First Detection (<50% Loss) | 8 | 0.72 ha | |
| Provisional (<50% Loss) | 22 | 1.98 ha | |
| Confirmed (<50% Loss) | 49 | 4.41 ha | |
| Provisional (≥50% Loss) | 2 | 0.18 ha | |
| Confirmed (≥50% Loss) | 91 | 8.19 ha | |
| Confirmed (<50% Loss) Finished | 2 | 0.18 ha |
January 31, 2026: Last DIST-ALERT granule
Last available DIST-ALERT granule within the monitoring period
True Color Satellite Image
Disturbance Overlay
| Disturbance Type | Pixels | Area | |
|---|---|---|---|
| First Detection (<50% Loss) | 23 | 2.07 ha | |
| Provisional (<50% Loss) | 27 | 2.43 ha | |
| Confirmed (<50% Loss) | 38 | 3.42 ha | |
| Provisional (≥50% Loss) | 14 | 1.26 ha | |
| Confirmed (≥50% Loss) | 111 | 9.99 ha | |
| Confirmed (<50% Loss) Finished | 5 | 0.45 ha |
OPERA DIST-ALERT Classification
↑ Back to topTechnical Monitoring Details
↑ Back to topDetection Methodology
Site Information
Assessment & Recommendations
↑ Back to topKey Findings
- ▸ Magnitude: 20.3% vegetation cover loss detected across 13.68 hectares
- ▸ Detection Date: Disturbance first detected on October 13, 2025
- ▸ Latest Observation: Most recent satellite data from January 31, 2026
- ▸ Confidence: Disturbance classified at Confirmed confidence level
📋 Recommended Actions
- Conduct a site inspection to confirm satellite findings and assess current conditions
- Photograph and document the extent of disturbance and any visible causes
- Determine the cause of disturbance (clearing, fire, disease, etc.)
- Update monitoring logs and notify relevant stakeholders
- Verify any required permits or authorizations if clearing was intentional
- Maintain regular satellite observation to track any further changes
Restor Site Monitoring System
Environmental Monitoring Service
This report uses vegetation disturbance data from NASA's OPERA DIST-ALERT (Observational Products for End-Users from Remote Sensing Analysis - Disturbance Alert) product. OPERA DIST-ALERT provides near real-time detection of land surface disturbances using Harmonized Landsat Sentinel-2 (HLS) data at 30-meter resolution.
Citation: Nguyen, T.H. et al. (2025). OPERA DIST-ALERT: Near-real-time disturbance detection in HLS satellite images. Nature Communications. https://www.nature.com/articles/s41467-025-64014-9
Satellite imagery previews use Landsat Collection 2 Level-2 data (Landsat 5, 7, 8, 9) produced by NASA/USGS and accessed via Microsoft Planetary Computer or, for the most recent acquisitions, via NASA LP DAAC (Earthdata) using the Harmonized Landsat Sentinel-2 (HLS) Level-3 product (HLSL30 v2.0). Landsat imagery courtesy of the U.S. Geological Survey.
Satellite imagery previews also use Sentinel-2 Level-2A data produced by ESA/Copernicus and accessed as Cloud-Optimized GeoTIFFs via AWS Earth Search (managed by Element 84). Access to Sentinel data is free, full and open under the Copernicus Terms and Conditions.
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