Mount Hibok-Hibok

Mount Hibok-Hibok
Name	Hibok-Hibok
Other name	Catarman Volcano
Elevation m	1,332
Location	Camiguin, Philippines
Coordinates	9°15′N 124°44′E
Type	Stratovolcano
Last eruption	1953–1954

Mount Hibok-Hibok Mount Hibok-Hibok is an active stratovolcano on the island of Camiguin in the Philippines. Situated in close proximity to the towns of Mambajao and Catarman, the peak dominates the island landscape and has shaped local settlement, agriculture, and maritime routes in the Bohol Sea region. The volcano’s eruptions in the 19th and 20th centuries drew attention from scientists and relief agencies across Asia and Europe, prompting advances in Philippine and international volcanology.

Overview

Hibok-Hibok rises on Camiguin, an island province created by volcanic activity in the Sulu Sea near the island of Mindanao, and lies within the jurisdiction of the Province of Misamis Oriental maritime boundaries. The summit crater, forested slopes, and adjacent cinder cones are landmarks for the municipalities of Mambajao and Catarman as well as for visitors arriving via Benoni Port and Camiguin Airport. Regional institutions such as the Philippine Institute of Volcanology and Seismology (PHIVOLCS), the National Disaster Risk Reduction and Management Council (NDRRMC), and the University of the Philippines have documented Hibok-Hibok’s morphology alongside comparative studies at Mount Mayon, Mount Kanlaon, and Mount Apo. Historical observers including Alfred Marche and foreign missions reported on earlier activity, which influenced colonial-era administration by the Spanish Empire and subsequent American colonial authorities.

Geology and Volcanology

Hibok-Hibok is a stratovolcano characterized by andesitic to dacitic lava flows, pyroclastic deposits, and multiple summit craters similar to features described for Mount Pinatubo and Mount St. Helens in comparative volcanological literature. The edifice sits on an island formed by successive eruptions related to subduction processes along the Philippine Mobile Belt and the complex tectonics near the Philippine Trench and the Cotabato Fault System. Petrological analyses by the Philippine National Oil Company and academic teams at Ateneo de Manila University and the University of the Philippines identified phenocrysts and mineral assemblages comparable to those found at Mount Bulusan and Taal Volcano, indicating evolving magma chambers and magma mixing episodes. Geophysical investigations, including seismic tomography by the National Institute of Geological Sciences and geodetic surveys supported by the Asian Development Bank, revealed shallow magma storage and hydrothermal circulation that feed solfataras and fumaroles akin to features at Davao del Sur geothermal fields.

Eruptive History

Documented eruptions of Hibok-Hibok occurred in 1827–1830, 1862, and the most significant sequence from 1948 to 1953, with violent explosive phases in 1951 and 1953. Contemporary observers during the mid-20th century included personnel from the World Health Organization, the United States Geological Survey, and the Royal Society, who recorded ashfall, pyroclastic surges, and lahar flows that affected surrounding settlements and altered coastal bathymetry near the Camiguin Channel. Newspapers such as The Manila Bulletin and international correspondents reported evacuation operations coordinated with the American Red Cross and the International Committee of the Red Cross, while scientific reports compared the activity to historic eruptions at Krakatoa and Mount Pelée. Post-eruption stratigraphy mapped by the Geological Survey of the Philippines and research teams from the Silliman University showed pumice layers, ignimbrites, and lahar deposits that reshaped river valleys feeding into the Bohol Sea.

Hazards and Monitoring

Hazards from Hibok-Hibok include pyroclastic density currents, ashfall, ballistic projectiles, lahars along drainage channels, and phreatic explosions near fumarolic zones; these hazards mirror risks studied at Mount Cotabato and Mount Iraya. Monitoring by PHIVOLCS employs seismographs, tiltmeters, gas spectrometers, and remote-sensing satellites operated by the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) and international partners such as NASA and the Japan Meteorological Agency. Early warning systems tied to municipal disaster offices and the Department of Health coordinate evacuation plans similar to protocols developed for Mount Mayon crises, while geomorphological mapping supported by the Asian Development Bank informs land-use policies and evacuation routes used by the Department of Public Works and Highways and the National Mapping and Resource Information Authority (NAMRIA).

Ecology and Surrounding Environment

The forested slopes of Hibok-Hibok host montane and lowland tropical forest communities with flora and fauna documented in inventories by the Department of Environment and Natural Resources (DENR), the Haribon Foundation, and the Palawan-based conservation groups. Vegetation zones include dipterocarp stands and mossy cloud forest comparable to habitats on Mount Kitanglad and Mount Hamiguitan, supporting avifauna recorded by the Philippine Eagle Foundation and endemic species surveyed by the Zoological Society of London–Philippines programs. Soil development on volcanic deposits has supported agricultural systems—coconut plantations, rice terraces, and abaca cultivation—managed by farmers organized through the Cooperative Development Authority and local agriculture extension services. Marine ecosystems off Camiguin’s coast, studied by the University of San Carlos and the Marine Science Institute, show coral reef assemblages affected historically by ash deposition and sedimentation events.

Human Impact and Response

The eruptions of the mid-20th century prompted large-scale evacuations, resettlement programs, and public-health responses involving the Bureau of Quarantine, World Health Organization, and the Philippine Red Cross. Economic impacts on fisheries, agriculture, and tourism led to recovery programs administered by the Department of Tourism, the Department of Agriculture, and international aid agencies such as UNICEF and the Asian Development Bank. Commemorative and educational efforts by local governments, museums, and academic institutions preserve oral histories collected by the National Historical Commission of the Philippines and case studies used in disaster management curricula at the University of the Philippines and Ateneo de Manila University. Ongoing community-based monitoring and resilience projects involve local barangays, nongovernmental organizations, and municipal disaster risk reduction offices to integrate traditional knowledge with scientific monitoring practiced by PHIVOLCS and international volcanology networks.

Category:Volcanoes of the Philippines Category:Active volcanoes