Overall Orange alert Volcanic eruption for Bulusan
in Philippines

Event summary

ORANGE alert: The Bulusan Volcanic eruption is unlikely to require external humanitarian assistance based on the exposed population and coping capacity.

GDACS ID VO 1000113
Name: Bulusan (273010)
Glide number: VO-2025-000058-PHL
Lat/Lon: 12.77 , 124.06
Event Date: 29 Apr 2025 UTC
Exposed Population 30km: About 650000 people within 30km
Exposed Population 100km: About 4290000 people within 100km
Max Volc. Explosivity Index VEI: 3
Population Exposure Index PEI: 6
Inserted at: 29 Apr 2025 07:23 UTC

GDACS Score

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Virtual OSOCC
Meteo assessment
Satellite products
Analytical products
Philippines - Volcanic eruption (ECHO 04 May 2025)Tue, 29 Apr 2025 10:06

  • As of 27 April at 20.36 UTC (28 April at 4.36 local time), a phreatic eruption occurred at Mount Bulusan located in the Sorsogon province, Bicol Region, southern Luzon Island, central Philippines. The eruption produced a plume that reached up to 4,500 m above the crater, dispersing ash to the west and southwest. Pyroclastic flow occurred and descended the southwestern slopes within approximately 3 km from the summit. Ashfall was reported across the Sorsogon province. 
  • The Philippine Institute of Volcanology and Seismology (PHIVOLCS) places the volcano under Alert Level 1 (low-level unrest).
  • The Disaster Response Operations Management Information Center (DROMIC) of the Department of Social Welfare and Development (DSWD) reports, as of 29 April, 61 evacuated people in two shelters across the Sorsogon province and a total of more than 78,150 affected people across the area.
  • The entry into the 4 km radius Permanent Danger Zone (PDZ) is currently strictly prohibited, as issued by the local authorities.
Philippines - Volcanic eruption, update (ECHO 05 May 2025)Wed, 30 Apr 2025 10:23

  • On 29 April at 11:43 UTC, another phreatic eruption occurred at the summit of Bulusan Volcano, lasting 77 minutes. The eruption plume was obscured by clouds but likely drifted southwest, based on reports from communities affected by ashfall.
  • According to the latest report from the Philippine Institute of Volcanology and Seismology (PHIVOLCS), approximately 1 cm of ash was observed in several localities within the municipalities of Irosin and Bulan in Sorsogon Province, Bicol Region, southern Luzon.
  • The Disaster Response Operations Monitoring and Information Center (DROMIC) reports that 276 people have been evacuated to two evacuation centers, and nearly 93,000 individuals across 63 barangays in Sorsogon Province have been affected.
  • Alert Level 1 (low-level unrest) remains in effect over Bulusan Volcano. Entry into the 4 km Permanent Danger Zone (PDZ) is strictly prohibited. Residents are also advised to exercise caution within the 2-kilometer Extended Danger Zone (EDZ) on the southeast sector.
Philippines - Volcanic eruption, update (ECHO 07 May 2025)Fri, 02 May 2025 10:52

  • In the past 24 hours, Bulusan Volcano has shown activity characterised by 66 volcanic earthquakes and weak gas and ash emissions from its crater.
  • The humanitarian impact continues to increase following the initial phreatic eruption that began on 27 April. According to the Disaster Response Operations Monitoring and Information Center (DROMIC), 2,443 people have been evacuated to five evacuation centers, and more than 110,000 individuals across 73 barangays in Sorsogon Province have been affected.
  • Alert Level 1 (low-level unrest) remains in effect for Bulusan Volcano. Entry into the 4 km Permanent Danger Zone (PDZ) is strictly prohibited. Residents are also advised to exercise caution within the 2 km Extended Danger Zone (EDZ) on the southeastern sector.
Detailed event map. European Union, 2025. Map produced by EC-JRC.
The boundaries and the names shown on this map do not imply official endorsement or acceptance by the European Union.

Updates on volcanic activity (Smithsonian)

The Smithsonian/USGS Weekly Volcanic Activity Report provides information about global volcanism on a weekly basis. Latest Bulusan report has been published on 23 Apr 2025 18:43.
The Philippine Institute of Volcanology and Seismology (PHIVOLCS) reported increased seismicity at Bulusan. Seismicity recorded from 0300 on 12 April until 2200 on 21 April consisted of 94 weak volcano-tectonic earthquakes indicating rock fracturing, another four low-frequency volcanic earthquakes indicating fluid movement. The earthquake locations were within 20 km depth, with about half characterized as shallow. Weak-to-moderate gas emissions rose from the summit crater and active vents. The Alert Level remained at 0 (the lowest level on a scale of 0-5). Source: Philippine Institute of Volcanology and Seismology (PHIVOLCS)
See the detail here

Latest media headlines

Bulusan Volcano records 69 volcanic quakes, 42 tremors 5/3/2025 7:33:00 AM.

MANILA, Philippines Bulusan Volcano in Sorsogon recorded 69 volcanic earthquakes and 42 volcanic tremors, according to the 24-hour monitoring of the Philippine Institute of Volcanology and Seismology (Phivolcs). The monitoring posted on Sat
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Calamity leave policy for workers a must amid volcanic eruptions--Trab.. 5/2/2025 3:34:00 PM.

Government must institutionalize a calamity leave policy for the sake of workers whose daily lives and livelihood are affected by volcanic eruptions, says Trabaho Party-list. Kanlaon Volcano (PHIVOLCS) Government must institutionalize a ca
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Trabaho party-list says admin’s wage hike a step in right direction 5/2/2025 10:58:00 AM.

MANILA, Philippines The salary increase for minimum wage earners in Metro Manila, through a review that will be conducted by the Regional Tripartite Wages and Productivity Board, is still a step in the right direction, Trabaho party-list sa
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Trabaho Partylist renews call for calamity leave for workers affected .. 5/2/2025 10:13:00 AM.

AFTER the Labor Day commemoration, Trabaho Partylist called for the standardization of a calamity leave policy to support affected workers whose daily lives and livelihoods have been affected by the magmatic unrest of Kanlaon Volcano and th
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Estimated casualties (PAGER)

USGS estimates the number of casualties for each earthquake for the Prompt Assessment of Global Earthquakes for Response (PAGER) product.
The graph shows the current fatalities estimate.

Exposed population

Data, images, links, services and documents

For this events, GDACS has links to information from the following sources: EC-JRC (32), (2), INGV (2), WMO (1), INFORM (2), JSR (1),