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Data from the Global Volcanism Program of the Smithsonian Institution
Details for: Iriga
Mount Iriga has a horseshoe-shaped crater opening to the SE that resulted from a large flank collapse during a Holocene eruption. The hummocky terrain in the foreground encloses small ponds on the surface of the debris avalanche deposit. Photo by Chris Newhall (U.S. Geological Survey).
Volcano Number:
273041
Volcano Name:
Iriga
Country:
Philippines
Volcano Type:
Stratovolcano
Elevation:
1138m
Tectonic Setting:
Subduction zone / Continental crust (> 25 km)
Pop. within 5km:
3712
Pop. within 10km:
142254
Pop. within 30km:
1159509
Pop. within 100km:
4399866
Latitude:
13.458
Longitude:
123.451
Details
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Mount Iriga (locally known as Mt Asog) is a small andesitic stratovolcano that rises immediately W of Lake Buhi which has satellitic cinder cones of basaltic composition. A large breached crater open to the SE was formed as a result of a major debris avalanche that buried several villages and formed a broad hummocky deposit across the plain south of Lake Buhi. This catastrophic event was at one time considered to have occurred during 1628 CE, but later work has shown that the collapse occurred earlier at some unknown date during the Holocene. An older debris avalanche deposit of similar size was also described SW of the volcano (Paguican et al., 2010). Both debris avalanche deposits cover wide areas of low, waterlogged plains, to a distance of ~16 km for the older and 12 km for the younger. The collapse orientation and deposit constituents for both are consistent with being a response to transtensional faulting and gravity spreading. A cone and lava covering about 9 km2 post-date the younger collapse.
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Eruption Data from the Global Volcanism Program of the Smithsonian Institution
Sorry. No erruption data found for this volcano.
Emissions Data from the Global Volcanism Program of the Smithsonian Institution
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Data from the Earthchem Library
Sorry. No data exist for this volcano in the EarthChem Library.
Data from the Earthchem Portal
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Data from the SESAR Database
Sorry. No data exist for this volcano in the SESAR database.
Data from the MaGa Database
Sorry. No data exist for this volcano in the MaGa database.
Data from UNAVCO
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Data from USIEI
Sorry. This volcano is not covered by any USIEI projects
Data from IRIS FDSNWS
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