Iraya is an
active volcano in the
Philippines, The morphologically youthful Iraya volcano, at the north end of Batan Island, is the northernmost active volcano in the Philippines. Iraya is the most prominent feature of the 20-km-long, dumbbell-shaped Batan island, located in the Luzon Strait between Luzon and Taiwan. The 1009-m-high Quaternary stratovolcano has a 1.5-km-wide summit crater, which is largely filled by a younger cone that forms the summit of the volcano. Observed late-Pleistocene and Holocene products of Iraya are exclusively explosive. The youngest dated unit of Iraya is a pyroclastic-flow deposit radiocarbon dated at about 1500 years ago (Richard et al., 1986). The Philippines Institute of Volcanology and Seismology (2004-) listed an eruption in 1454 AD of unspecified character.
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Country: | Philippines |
Subregion Name: | North of Luzon (Philippines) |
Volcano Number: | 0704-06- |
Volcano Type: | Stratovolcano |
Volcano Status: | Historical |
Last Known Eruption: | 1454 (?) |
Summit Elevation: | 1009 m | 3,310 feet |
Latitude: | 20.469°N | 20°28'7"N |
Longitude: | 122.010°E | 122°0'35"E |
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Physical features
Iraya is a heavily forested
stratovolcano, with an elevation of 1,009 metres (3,310 ft)
asl, and a base diameter of 5,500 metres (18,000 ft).
Adjacent volcanic edifice is Mt. Matarem.
Volcanic activity
Mount Iraya last erupted in 1454, and the
Philippine Institute of Volcanology and Seismology (Phivolcs) considers it as one of the
active volcanos in the Philippines.
In 1998,
volcanologists recorded seismic swarms which led them to form a monitoring network on Batan Island for several months. After the swarms of tremors had diminished, the temporary stations in
Brgy. San Joaquin in
Basco, Batanes and another near the crater, were pulled out. Seismicity or any activity relating to Iraya is still monitored by the Basco Seismological Station.
Volcanos of the Philippines are all part of the
Pacific ring of fire.
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Volcanic arc/belt | Babuyan (Bashi) Segment of Luzon-Taiwan Arc |
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