Executive Summary for the Seismic Activity at Mayon Volcano
The Philippine Institute of Volcanology and Seismology (PHIVOLCS) reported 25 volcanic earthquakes at Mayon Volcano on 02 March, maintaining Alert Level 3. The most likely near-term outlook is continued effusive activity, including rockfalls, lava flows and minor ash emissions confined within established exclusion zones. Escalation to more explosive activity remains possible but not the primary forecast.
- Date of Event: 02 March
- Location: Albay, Philippines
- Risk Category: Natural Disasters
- Severity Score: 3 / 5
- Confidence Level: 68 %
What is Risk Analysis in the Context of Natural Disasters Events
Natural disaster risk analysis evaluates geophysical hazards such as volcanic eruptions, earthquakes and associated secondary threats including ashfall and lahars. In the context of volcanic activity, monitoring seismicity, gas emissions and ground deformation is critical to forecasting escalation. Mayon Volcano has a documented history of effusive eruptions, lava advancement and intermittent ash emissions. Alert Level 3 signifies increased unrest with potential for hazardous eruption. Historical patterns in early 2026 show recurring rockfalls and lava flows extending several kilometres from the crater, reinforcing the need for sustained vigilance and business continuity planning.
Known Hotspots and Sensitive Areas
High Impact:
- Six-kilometre permanent danger zone around the summit
- Bonga-Buyuan and Mi-isi river channels prone to lahars
- Barangays in Camalig, Guinobatan, Daraga, Legazpi and Tabaco
Medium Impact:
- Slopes and agricultural land beyond six kilometres but within lahar pathways
- Airport approach corridors to Bicol International Airport
Low Impact:
- Urban centres outside established exclusion and drainage zones
Mayon’s eruptive history demonstrates recurring lava extrusion and ashfall episodes, particularly during sustained Alert Level 3 periods.
Impact on Transportation and Services
Local access roads on Mayon’s flanks may close during heightened rockfall or ashfall events. Aviation operations in Bicol airspace may experience temporary delays or route adjustments if ash plumes intensify. Tourism activities within exclusion zones remain suspended. Ash accumulation can disrupt power supply, water systems and communications infrastructure, while lahars may damage bridges and low-lying roads. Provincial-level business operations generally continue but with localized supply chain delays.
Recommended Actions
Immediate Measures:
- Suspend non-essential operations within the six-kilometre exclusion zone.
- Conduct personnel roll calls and verify evacuation readiness.
- Protect sensitive equipment from ash ingress and secure utilities.
- Monitor PHIVOLCS daily bulletins and local government advisories.
Strategic Measures:
- Activate Business Continuity Plans for facilities in Albay.
- Pre-position protective equipment including N95 masks and eye protection.
- Establish alternate logistics routes outside lahar-prone channels.
- Coordinate with PHIVOLCS, NDRRMC and local disaster risk reduction offices.
Multidimensional Impact
Rainfall-triggered lahars could amplify hazard exposure, increasing damage to downstream infrastructure and agricultural assets. Prolonged unrest may strain evacuation centres and local government resources, affecting workforce stability and regional commerce.
Emergency Contacts
- Emergency Number: 911
- PHIVOLCS: phivolcs.dost.gov.ph/
Final Thoughts
Mayon’s continued Alert Level 3 status reflects sustained volcanic unrest with moderate but tangible local risk. While effusive activity remains the most probable trajectory, rapid escalation cannot be excluded. Businesses and authorities should maintain heightened situational awareness, protect personnel and assets, and prepare for ashfall or lahar-related disruptions.
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