Satellite-Detected Mudflow Extent in Santo Antao Island, August 2025

August 2025 satellite analysis maps mudflow extent from a 700 km² area in Santo Antao Island, Cabo Verde. The dataset identifies approximately 3 km² of flooded land, 460 damaged buildings, two damaged bridges, and 5 km of affected roads. It was produced by the United Nations Satellite Centre (UNOSAT) using Pleiades very high-resolution imagery.

Use Cases

• Assess flood impact by analyzing the 3 km² mudflow extent polygon for risk modeling.
• Identify critical infrastructure damage by mapping the 460 damaged buildings and two damaged bridges.
• Plan disaster response logistics by evaluating the approximately 5 km of affected roads.
• Validate satellite-derived damage assessments against ground reports for the specified buildings and roads.

Strengths

• Covers a specific 700 km² analyzed area on Santo Antao Island.
• Provides concrete impact metrics: 3 km² of flooded land, 460 damaged buildings, two damaged bridges, and 5 km of affected roads.
• Based on Pleiades very high-resolution satellite imagery from 13-16 August 2025.

Limitations

• Preliminary analysis not yet validated by ground truthing, potentially containing inaccuracies.
• Spatial and temporal scope is limited to a single island and a four-day period in August 2025.
• Data is vector-based (GEODATABASE, SHP); users require GIS software for analysis.

Provenance

Source

United Nations Satellite Centre (UNOSAT).

Collection Method

Analysis of Pleiades very high-resolution satellite imagery using computer vision.

Time Range

13 to 16 August 2025.

Freshness

Last updated on 24 March 2026.

Geography

Santo Antao Island, Cabo Verde.