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Iriga

Photo of this volcano
  • Philippines
  • Philippines and SE Asia
  • Stratovolcano
  • Unknown - Evidence Credible
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 13.458°N
  • 123.451°E

  • 1138 m
    3734 ft

  • 273041
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

The Global Volcanism Program has no activity reports for Iriga.

The Global Volcanism Program has no Weekly Reports available for Iriga.

The Global Volcanism Program has no Bulletin Reports available for Iriga.

This compilation of synonyms and subsidiary features may not be comprehensive. Features are organized into four major categories: Cones, Craters, Domes, and Thermal Features. Synonyms of features appear indented below the primary name. In some cases additional feature type, elevation, or location details are provided.

Eruptive History

There is data available for 1 Holocene eruptive periods.

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
[ 1628 ] [ Unknown ] Discredited    
Deformation History

There is no Deformation History data available for Iriga.

Emission History

There is no Emissions History data available for Iriga.

Photo Gallery

Mount Iriga is a stratovolcano whose most prominent feature is a large horseshoe-shaped caldera that is breached to the SE. It was formed by a massive volcanic landslide during an eruption that at one time was considered to have most likely occurred in 1628 CE, but was later found to have occurred earlier at some unknown time during the Holocene. The hilly terrain in the foreground, encloses small ponds on the surface of the debris-avalanche deposit.

Photo by Chris Newhall (U.S. Geological Survey).
See title for photo information.
Collapse of the summit and flanks of volcanoes during major volcanic landslides creates large horseshoe-shaped depressions that open in the direction of the landslide. This 2.1 x 3.5 km horseshoe-shaped caldera at Iriga volcano in the Philippines was produced by a massive landslide during the Holocene. The resulting debris avalanche traveled more than 10 km to the SE and flowed into Lake Buhi at the upper right. This view is from the south, with the summit of Iriga at the extreme left.

Photo by Chris Newhall (U.S. Geological Survey).
See title for photo information.
The small crater at left-center was formed at the base of the headwall of a massive landslide during an eruption during the Holocene. This view looks west into the horseshoe-shaped caldera created during the collapse, with the summit of Iriga in the background. The headwall above the crater is 600 m high.

Photo by Chris Newhall (U.S. Geological Survey).
See title for photo information.
The entire foreground area in this view of Iriga volcano in the Philippines is a massive, 1.5 cu km debris-avalanche deposit formed by a Holocene landslide from Iriga volcano in the Philippines. This view from the SE shows the typical hummocky topography of debris-avalanche deposits. Many of the darker areas are tree-covered hummocks; the irregular topography of the avalanche-deposit also encloses many small ponds.

Photo by Chris Newhall (U.S. Geological Survey).
See title for photo information.
GVP Map Holdings

The maps shown below have been scanned from the GVP map archives and include the volcano on this page. Clicking on the small images will load the full 300 dpi map. Very small-scale maps (such as world maps) are not included. The maps database originated over 30 years ago, but was only recently updated and connected to our main database. We welcome users to tell us if they see incorrect information or other problems with the maps; please use the Contact GVP link at the bottom of the page to send us email.


Title: Philippines
Publisher: Apa Maps - Nelles Verlag, W Germany
Country: Philippines
Year: 1984
Map Type: Geographic
Scale: 1:1,500
Map of Philippines

Title: Phillipines
Publisher: DMA Aerospace Center
Country: Philippines
Year: 1984
Series: ONC
Map Type: Topographic
Scale: 1:1,000,000
Map of Phillipines

Title: Philippine Islands
Publisher: DMA Aerospace Center
Country: Philippines
Year: 1982
Series: TPC
Map Type: Topographic
Scale: 1:500,000
Map of Philippine Islands

Title: Legaspi City
Publisher: US Army Map Service
Country: Philippines
Year: 1966
Series: S501
Map Type: Topographic
Scale: 1:250,000
Map of Legaspi City

Title: Legaspi City
Publisher: US Army Map Service
Country: Philippine Islands
Year: 1955
Series: AMS
Map Type: Topographic
Scale: 1:250,000
Map of Legaspi City

Title: Bulan
Publisher: US Army Map Service
Country: Philippine Islands
Year: 1955
Series: AMS
Map Type: Topographic
Scale: 1:250,000
Map of Bulan

Title: South Luzon
Publisher: US Army Map Service
Country: Philippine Islands
Year: 1944
Series: AMS
Map Type: Topographic
Scale: 1:1,000,000
Map of South Luzon

Title: Philippines South: Special Strategic Map
Publisher: US Army Map Service
Country: Philippines
Year: 1943
Series: AMS
Map Type: Topographic
Scale: 1:2,000,000
Map of Philippines South: Special Strategic Map

Title: Philippines North: Special Strategic Map
Publisher: US Army Map Service
Country: Philippines
Year: 1943
Series: AMS
Map Type: Topographic
Scale: 1:2,000,000
Map of Philippines North: Special Strategic Map
Smithsonian Sample Collections Database

There are no samples for Iriga in the Smithsonian's NMNH Department of Mineral Sciences Rock and Ore collection.

Affiliated Sites