CAGUA VOLCANO IN CAGAYAN

Cagua, one of the active volcanoes in the Philippines, is located in the province of Cagayan. Specifically, it lies in the Cagayan Valley region, of northern Luzon island. Located in the northernmost part of the Sierra Madre mountain range, it lies in a region of active volcanism which probably originates from a fault between Babuyanes and Luzon. Though there is a more evident seismic record between northeast Luzon and the islands, volcanoes occur on the northwestern side of the island. Evidence of a correlation between the two islands includes agglomerates from multiple volcanoes and pebbles of andesitic lava throughout the region. - http://en.wikipedia.org/wiki/Cagua_Volcano

Photo from:  www.phivolcs.dost.gov.ph 

This volcano is 3,717 feet high with a distinct summit crater. An explosive eruption was recorded in 1860. Signs of activity were observed in 1907 but no eruptions took place and the volcano has been quiet since.  - http://wikimapia.org/1901450/Mt-Cagua-Volcano

Photo from:  en.wikipedia.org 

Cagua volcano is located in northern Luzon, Philippines. It is considered part of the Babuya segment because it falls within the N-S trend of the active volcanoes and is east of the trend of the Northern Luzon extinct volcanic centers.
Mt. Cagua is a calcalkaline basaltic and andesitic stratovolcano, which has been built up by at least three eruptive phases:
1) An effusive phase between 1.5 and 1.2 Million years ago.
2) Emission of thick andesitic pyroclastic flows at approximately 670,000 years ago.
3) Young ash flow deposits, deposits, some of which were phreatomagmatic in origin.
- http://www.volcanolive.com/cagua.html

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IRIGA VOLCANO IN CAMARINES SUR

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Mount Iriga volcano is a small stratovolcano immediately SW of Lake Buhi in southern Luzon, Philippines.

The volcano is dominantly andesitic in composition, but has several basaltic flank cones. It has a large crater breached to the SE, which formed during a massive flank failure that produced a large debris avalanche which buried several villages and formed a hilly, irregular deposit on the plain south of Lake Buhi 4 km from the summit.

Background:

Iriga is part of the Bicol volcanic arc which comprises at least 12 volcanic vents and complexes and is one of the 3 historically active, but the least active centers of the arc (the other 2 being Mayon and Bulusan). Iriga has only 2 known recorded eruptions in historic times.

The catastrophic debris avalanche of Iriga volcano had been believed to have occurred during the 1628 AD eruption, but later work has now shown that the collapse and eruption occurred earlier at some unknown date in the past few thousands years. The avalanche was followed by phreatic explosions that created a small crater at the base of the scarp.

SOURCE:  http://www.volcanodiscovery.com/iriga.html



Photo from:  http://www.volcano.si.edu/volcano.cfm?vn=273041

Mount Iriga, also known as Mount Asog, is one of the active volcanos in the Philippines, in the province of Camarines Sur, in the Philippines.

Mount Iriga is a stratovolcano about a kilometre from Lake Buhi. It rises 1,196 m (3,924 ft) with a base diameter of 10 kilometres.

Iriga erupted in 1628 and 1642. Iriga is generally known for its phreatic explosions.

SOURCE:  http://wikipedia.org

Photo from:  http://www.mnh.si.edu



Iriga volcano is located in southern Luzon, Philippines. The Bicol Arc is composed of at least twelve volcanic centers and complexes that include three active volcanoes (Mayon, Iriga and Bulusan). Iriga is the least active of the three active volcanoes having had only two eruptions recorded throughout its history.

The southern flank of Iriga has collapsed previously, causing a debris avalanche which traveled several kilometres, damming a river and creating a lake.

A left-lateral strike-slip fault passes under Iriga volcano.

Crater lake Buhi is located 4 km east of the summit. The lake is the home to the world's smallest edible commercial fish - Sinarapan (Mistichthys luzonensis).

The hazards at Iriga volcano are lava flows, pyroclastic flows, airfall tephra, debris avalanche and lahars.

SOURCE:  http://www.volcanolive.com/iriga.html

Photo from:  malate.wordpress.com 

Photo from:  malate.wordpress.com 



MT. DIDICAS IN CAGAYAN

Didicas volcano is a small volcanic island 22 km NE of Camiguin Island, 60 km off the northern coast of Luzon, Philippines.

Photo from:  http://flickr.com



Until 1952, it was a submarine volcano that had previously formed temporary islands during eruptions. In the eruption of 1952 the submarine volcano formed a new lava dome that surfaced above sea level and has become now a permanent new island.

 

Background:

Didicas volcano now consists of a small, 244-m-high andesitic lava dome about 1.4 km in its longest diameter.

A 400-m-wide crater was formed during the 1952 eruption. The first recorded submarine eruption of Didicas occurred in 1773. 

Photo from:  http://sciencythoughts.blogspot.com 



In an eruption in 1860, Didicas also built a new island, the first recorded cone of Didicas breaching the sea surface. It reached a height of 213 m in 1860, when the eruption ended, but it was soon eroded beneath the sea, because it mainly consisted of loose tephra. 3 rock masses up to 82 m high were left after an eruption in 1900. 2 more eruptions occurred since 1952 at an explosion crater on the northern side of the island. (Source: GVP volcano information)

- Text above from:  http://www.volcanodiscovery.com

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