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NAME OF VOLCANO:                        HIBOK-HIBOK           

LOCATION:                                         Camiguin Island, located at the northwestern end of the Island

                                                             (912.2'N, 12440.5’E)    




Elevation:  1.332 km

Base Diameter:  10 km

Type of Volcano:  Stratovolcano and dome complex

Hotsprings:  Ardent Spring, Tangob, Bugong, Tagdo, Naasag, Kiyab

Crater Lakes/Maars:

CRATERS:  Kanangkaan Crater (site of 1948 eruption)

              Itum Crater (site of 1949 eruption)

              Ilihan Crater (site of 1950 eruption)

MAAR:  Taguines Lagoon (located between Binone and Maac)

Adjacent Volcanic Edifice:  Mt. Vulcan ( 671 m high asl, NW of Hibok-Hibok ), Mt. Mambajao  (center of Camiguin), Mt. Ginsiliban (581 m high asl, southernmost Camiguin), Mt. Uhay (N of Mount Ginsiliban); Domes and cones:  Campana Hill, Minokol Hill, Tres Marias Hill, Mt. Carling, Mt. Tibane, Piyakong Hill




Rock Type:  Hornblende andesite and dacite

Tectonic Setting:  Central Mindanao Arc




Number of Historical Eruptions:  5

Latest Eruption/Activity:  1948 Sept. 31 - 1953 July

Eruption Type:

1. Pelean (e.g. 1948-1952)

2. Dome building with nuee ardente (e.g. 1871, 1949-1953)

3. Solfataric activity with subterranean sounds ( e.g. 1897-1902)

Eruption Sites during the 1948-1952 eruptions: Kanangkaan Crater (1948),   Itum Crater (1949) and c) Ilihan Crater (1950). 

Eruption Pattern observed during the 1948-1952 eruptions (a cycle of four phases):

1. A short period of emission of considerable amount of steam from the crater and avalanches of volcanic materials;

2. Explosions or steam blast with emission of heavy clouds of steam, ash and other fragmentary volcanic materials with a strong possibility of the development of nuee ardente;

3. Eruption of incandescent meterials, emission of ash and steam in large amounts, formation of flows and occasional minor crateral outburst, and

4. Decrease in amount of steam and other ejecta from the crater.

Precursors to Eruptions:

1. Increasing number of volcanic quakes/tremors

2. Localized landslides, rockfalls and landslides from the summit area not attributable to heavy rains

3. Appreciable increase in steam emission

4. Progressive ground deformation (tilting, inlfation, etc.

5. Presence of crater glow

6. Appearance of solfataras




Type of Hazards:   Steam blasts, Glowing avalanches, Lava flows, Lahars

Permanent Danger Zone:  Three (3) km radius from the summit

Other Buffer Zones:

POTENTIALLY DANGEROUS AREA: Camiguin Island and north of line connecting Tangaro, Catarman and Tupsan (all in Mambajao)




Volcano Observatory:  Quiboro Volcano Observatory, Mambajao, 4.7 km NE of Hibok-Hibok (, 9 14.0'N, 124 40.3'E)

Monitoring Methods:

1. Seismic (number of recorded volcanic quakes and tremors)

2. Ground deformation – Electronic Distance Measurement (EDM)

3. Visual observations (steaming activity, and other phenomena)

Monitoring Stations

A - Seismic Network

         Hibok-Hibok Observatory

         Upper Southeast Slope

         Napo, Catarman

         Vulcan Peak Observation Point

         Vulcan Peak Repeater Station

         Lawigan, Catarman

         Mainit, Catarman Observation Point


B - Ground Deformation

         PRECISE LEVELING LINE - Quiboro to Hibok-Hibok slope