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PHIVOLCS Website
LOCATION: MAMBAJAO, CAMIGUIN ISLAND, Nothern Mindanao (09°12.2'N - 124°40.5'E)
PHYSICAL
CHARACTERISTICS:
Peak
Elevation: 1,332 m asl
Type of Volcano: Stratovolcano and Dome
Complex
Main Rock
Type: Hornblende Andesite and Dacite
Other Volcanoes Within Camiguin
Island:
Mt. Vulcan - located at the NW base of
Hibok-hibok
Mt. Mambajao - lies at the center of Camiguin
Island
Mt. Uhay - situated north of Mt.
Ginsiliban
Mt. Ginsiliban - found at the southernmost Camiguin
HISTORICAL ERUPTIONS:
Recorded
Eruptions: 1827, 1871, 1897-1902, 1948-1953
Most Destructive Eruption: September 1948 to July 1953 -
500 killed (This eruption
prompted
the Philippine Goverment to create the Commission on Volcanology,
presently known
as
PHIVOLCS)
Types of
Activities:
Pelean Eruption (e.g. 1948-1952
eruption)
Dome building with nuee ardente (e.g. 1871)
Solfataric activity with subterranean sounds (e.g. 1897-1902)
Precursors to Eruptions:
Increase number of volcanic
quakes/tremors
Localized landslides, rockfalls and landslides from the summit area
not attributable to heavy rains
Appreciable increase in steam
emission
Progressive ground deformation (tilting, inflation,
etc..)
Presence of crater
glow
Appearance of solfataras
Phenomena Associated with Eruptions: Steam
Blasts
Lahars
Glowing Avalanches
Fissuring and
subsidence
Lava
Flows
Tsunami
MONITORING TECHNIQUES:
Monitoring
Methods:
A. Geophysical
Method
Seismic monitoring - 2-component smoked type Hosaka seismograph
at Quiboro
station.
FIRST SEISMOGRAPH: 1948 (2-component, low magnification
Vincentti seismograph
installed at
Mambajao.
B. Geodetic
Methods
Electronic Distance
Measurement
Precise
leveling
Tilt measurements (wet and
dry)
FIRST WATER TUBE TILTMETER: in the Philippines:
1958
C. Visual Observations
Monitoring Stations: Quiboro Volcano Observatory, Mambajao
4.7 km NE of the summit
DANGER ZONES:
Restricted
Area - 3 km radius from summit
Potentially Dangerous Area - Camiguin Is. and North of line
connecting Tangaro, Catarman,
and
Tupsan, all in Mambajao
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