The Philippine Space Agency (PhilSA) produced a crop exposure map showing ash-affected Physical Rice Areas (orange) and Other Crop Areas (yellow) following the reported pyroclastic density current along the Mi-isi gully of Mayon Volcano on 2 May 2026. At least 1,039 hectares (10.39 sqkm) of rice and 191 hectares (1.91 sqkm) of other crops were potentially affected because they are found within the Estimated Ash Deposit Extent (delineated in red, based on a previous analysis by PhilSA published on 5 May). The combined area of potentially affected crops is around the size of Mandaluyong City.

Physical Rice Areas, areas typically planted with rice during cropping season, were sourced from the Philippine Rice Research Institute (DA-PhilRice). Other Crop Areas were classified based on changing vegetation patterns in Sentinel-2 imagery from January to December 2024. Additionally, there are at least 158 km of roads within the Estimated Ash Deposit Extent (in red), based on a dataset of road networks. 

The amount of information derived from satellite data is oftentimes constrained by cloud cover. Areas covered by clouds during the image capture (grey hatched) contain no observable ground data and may or may not have ash deposits. The estimated Ash Deposit Extent is consistent with projections from atmospheric trajectory modeling and reports from the ground. The map is still subject to ground validation. 

PhilSA’s support through the analysis of satellite data provides wide-area coverage that assists the National Disaster Risk Reduction and Management Council (NDRRMC) in monitoring the situation and prioritizing areas for response. By making space data accessible to stakeholders, PhilSA enables informed decision-making and strengthens disaster response. 

PhilSA will continue monitoring satellite data as the situation requires. Please follow local and national agencies for the latest advisories. 

Access the high-resolution map and shapefile of the ashfall crop exposure map here: https://bit.ly/MayonAshfall  

Previous releases on the Mayon Volcano pyroclastic density current can be found below:

Follow us on social media for the latest updates: https://linktr.ee/philspaceagency 

(Filipino Translation: Bukirin na natabunan ng abo, tinukoy ng satellite data  

Gumawa ang PhilSA ng crop exposure map na nagpapakita ng mga bukirin na natabunan ng abo mula sa pagdaloy ng pyroclastic density current sa Mi-isi gully ng Bulkang Mayon noong 02 Mayo 2026.  

Batay sa pagsusuri ng PhilSA, tinatayang nasa 1,039 ektarya ng palayan at 191 ektarya ng iba pang lupang sakahan ang maaaring naapektuhan ng abo sa loob ng Estimated Ash Deposit Extent na tinukoy ng PhilSA sa naunang pagsusuri na linabas noong 05 Mayo. Ang kabuuang lawak ng apektadong sakahan ay halos kasinlaki ng Lungsod ng Mandaluyong.  

Hindi bababa sa 158 kilometro ang mga kalsada na nasa loob ng Estimated Ash Deposit Extent. Gumamit ang PhilSA ng satellite data upang matukoy ang lawak ng pinsala, ngunit may ilang bahaging natatakpan ng ulap kaya ang mga sukat ay tinatayang saklaw lamang. Ang lawak ng Ash Deposit Extent ay tugma sa mga projection mula sa atmospheric trajectory modeling at mga ulat mula sa lugar. Gayunpaman, kailangan pa rin itong kumpirmahin sa pamamagitan ng ground validation. 

Patuloy na binabantayan ng PhilSA ang sitwasyon gamit ang satellite data upang makatulong sa NDRRMC sa pagtukoy ng mga prayoridad na lugar para sa pagtugon at relief operations. Hinihikayat ang publiko na sundin ang mga abiso mula sa lokal at pambansang ahensya.)