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Babuyan Claro gdapd small


NAME OF VOLCANO:                                     BABUYAN CLARO

LOCATION:                                                       Babuyan Islands, Cagayan
                                                                           (19°31.5'N, 121° 57'E)


Elevation: 0.843 km
Base Diameter: 0.920 m
Type of Volcano: Stratovolcano

Askedna Hot Spring - located at southern basal slope of Babuyan Claro with It has a temperature range of 44.6 to 50.2°C. The water in Askedna hot spring is slightly acidic. Since the spring flows directly from lava flow deposits, the silica content is relatively high. Based on its chemical composition the spring water can be classified as near-neutral sodium-chloride brine.

Adjacent Volcanic Edifice:

The 900-m high island made up of four juxtaposed morphologically-fresh volcanoes: Mt. Cayonan, located south, basic andesite, with age at 1.65+/0/09; Mt. Naydi and Mt. Dionisio, two basaltic andesitic stratovolcanoes emplaced at ca. 1.2 - 1.1 Ma, the summits of which are truncated by partially eroded caldera walls that open to the SE; Mt. Pangasun, a stratovolcano, the summit of which displays two very well-preserved craters 300 and 400 m in diameter; basic andesite, age at 1.05+/-0.08; 1.46 K2O (Source: Maury, R.C., , et. Al. , 1998. "Temporal geochemical trends in Northern Luzon arc lavas (Phil.): implications on metasomatic processes in the island arc mantle." Bull. Soc. Geol. France.)


Rock Type: Basalt
Tectonic Setting: Babuyan (Bashi) Segment of Luzon-Taiwan Arc
Age of Deposits: 2.32+/-0.35 Ma -- 1480+/-50 B.P (H.Bellon, J.C. Philippet, Brest. 1984)


Number of Historical Eruptions: 4
Year: 1831, 1860, 1913, 1917
Eruption Type: strombolian, phreatomagmatic
Volcanic Hazards: lava flow, tsunami



June 1993 – short-term seismic and visual monitoring; FINDINGS: volcano was quiet

July 8, 1993 – emergency investigation due to reported earthquakes and alleged drying up of vegetation at the upper slopes and summit area of the volcano; FINDINGS: Earthquakes were of tectonic origin; no significant change in the volcanic activity

February 29, 2004 – emergency investigation due to alleged volcanic activity (grayish steam clouds hovering above the summit are of Babuyan Claro); FINDINGS: Seismic swarm was tectonic in origin; steaming activity varied from wispy to weak.