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View of Mt. Bulusan on June 6, 2022 from Juban, Sorsogon. Photo courtesy of 9th Infantry Division Public Affairs Office/File

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View of Mt. Bulusan on June 6, 2022 

Kaxandra Salonga

ABS-CBN News

<div><span class="fr-img-caption fr-fic fr-dib" style="width:960px;display:block" width="960"><span class="fr-img-wrap"><img src="https://od2-image-api.abs-cbn.com/prod/editorImage/17742497796971774249777041.jpeg" style="width:960px" class="fr-fic fr-dib" width="960"/><span class="fr-inner" style="text-align:left">View of Mt. Bulusan on June 6, 2022 from Juban, Sorsogon. <em>Photo courtesy of 9th Infantry Division Public Affairs Office/File</em></span></span></span></div><p>MANILA — Residents living near the rumbling Bulusan volcano in Sorsogon, Bicol Region have been told to avoid going inside danger zones due to threats of pyroclastic density currents (PDCs), which are fast-moving mixture of hot volcanic gas, ash, and rock fragments.</p><p>PDCs sometimes reach speeds of hundred kilometers per hour, Phivolcs director Teresito Bacolcol said, warning they are potentially hazardous because almost everything on their path is left burned.</p><p>Phivolcs prohibits entry into the 4 kilometer-radius permanent danger zone of Bulusan volcano, including the 2-kilometer extended danger zone in the southeastern part, Bacolcol said in an interview with Bagong Pilipinas Ngayon.</p><p>Phivolcs <a href="https://www.abs-cbn.com/news/regions/2026/3/22/alert-level-1-raised-over-bulusan-volcano-1502">raised to 1 from zero the alert level of Bulusan</a> volcano on Sunday as it entered a period of low-level unrest with a sustained series of volcanic earthquakes that began last week. The agency has a 5-step alert level for Bulusan volcano.</p><p>Some 475 volcanic earthquakes have been recorded at Bulusan volcano since March 15, Phivolcs said in an advisory.</p><p>Aside from PDCs, Bacolcol also told Bulusan residents to stay alert for ash falls and sediment-laden flows, which can hit rivers and other water streams during heavy and prolonged rain.</p><p>Sediment-laden flows can strike river channels and valleys in the southeastern, southwestern, and northwestern sectors of the volcano, he said.</p><p>Bacolcol said that while a phreatic eruption is possible, the volcano&#x27;s current activity is more similar to a shallow hydrothermal activity, which means hot water is building pressure under the volcano.</p><p>&quot;So binabantayan natin kung dadami at lalakas ang lindol, mag-i-intensify yung suface deformation na nakikita natin, magbabago ang gas emission at visible changes sa craters ng bulkan, [dahil] yan ang senyales ng posibleng paglala,&quot; he said.</p><p>The volcano&#x27;s reported sulfur dioxide emission of 91 tons per day on March 18 is not unusually high, Bacolcol noted, as he explained that higher sulfur dioxide emissions usually indicate stronger gas release from the magma, as seen at Taal Volcano.</p><div><br/></div><div><strong>FROM THE ARCHIVES:</strong></div><div><span class="fr-video fr-deletable fr-fvc fr-dvb fr-draggable" contenteditable="false" draggable="true"><iframe width="640" height="360" src="https://www.youtube.com/embed/-PlCckjTkmA?&amp;wmode=opaque&amp;rel=0" frameBorder="0" allowfullscreen="" class="fr-draggable"></iframe></span><br/></div>

<p>Residents living near the rumbling Bulusan volcano in Sorsogon have been told to avoid going inside danger zones due to threats of pyroclastic density currents.</p>

Residents living near the rumbling Bulusan volcano in Sorsogon have been told to avoid going inside danger zones due to threats of pyroclastic density currents.

Residents told to avoid Bulusan volcano danger zones over hazardous flows

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Residents told to avoid Bulusan volcano danger zones over hazardous flows

Kaxandra Salonga,

ABS-CBN News

Published March 23, 2026 03:13 PM PHT

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Updated March 23, 2026 03:16 PM PHT

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Phivolcs

Bulusan Volcano

Volcano

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