Satellite data show barangays affected by ashfall from Mayon

The Philippine Space Agency (PhilSA) produced a map showing areas covered by ash deposits (bounded in red) from the reported pyroclastic density current along the Mi-isi gully of Mayon Volcano on 02 May 2026. The ash deposits (shaded in red) were classified using change detection on a Sentinel-2 satellite image from 03 May 2026 (shown top) compared with a reference image from before the event (28 April 2026). The bottom map overlays the estimated ash deposit extent to show potentially affected barangays. Based on the analysis, at least 8,544 hectares (~85.44 sqkm) were covered by ashfall. For comparison, this area is around half the size of Quezon City.