Reporoa

Photo of this volcano
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  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 38.42°S
  • 176.33°E

  • 592 m
    1942 ft

  • 241060
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

The Global Volcanism Program has no activity reports for Reporoa.

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

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

The 10 x 15 km wide Reporoa caldera, occupying the Reporoa-Broadlands basin, lies near the western margin of the Taupo volcanic zone SSW of the Okataina volcanic center. Reporoa caldera formed about 230,000 years ago during the eruption of the voluminous ca. 100 cu km Kaingaroa Ignimbrite. Large slump scallops cut the northern caldera rim; on the south the rim is buried by sediments. The Deer Hill rhyolitic lava dome was erupted after caldera collapse on the southern rim; two other rhyolitic domes, Kairuru and Pukekahu, were emplaced within the caldera along a possible ring fault. The active Reporoa hydrothermal field lies within the caldera, and the Waiotapu and Broadlands (Ohaki) hydrothermal fields lie occur north and south of the poorly defined caldera margin. Eruptions within the caldera have not occurred since the late Pleistocene, but large hydrothermal explosions took place from the Waiotapu thermal area immediately to the north at the time of the Kaharoa eruption of neighboring Tarawera volcano about 770 years ago.

Summary of Holocene eruption dates and Volcanic Explosivity Indices (VEI).

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
1180 (?) Unknown Confirmed   Tephrochronology Waiotapu thermal area

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.



Craters
Feature Name Feature Type Elevation Latitude Longitude
Ngahewa, Lake Crater 411 m 38° 19' 0" S 176° 23' 0" E
Ngapouri, Lake
    Opouri, Lake
Crater 477 m 38° 20' 0" S 176° 20' 0" E
Okaro, Lake Crater


Domes
Feature Name Feature Type Elevation Latitude Longitude
Deer Hill Dome
Kairuru Dome 447 m 38° 27' 0" S 176° 19' 0" E
Pukekahu Dome 346 m 38° 28' 0" S 176° 21' 0" E


Thermal
Feature Name Feature Type Elevation Latitude Longitude
Broadlands
    Ohaki
    Ohaaki
Thermal 300 m 38° 33' 0" S 176° 19' 0" E
Waiotapu Thermal 460 m 38° 20' 0" S 176° 20' 28" E
Multi-colored Bridal Veil Falls were formed from silica terraces created when mineralized water poured over from the Primrose Pool of the Waiotapu thermal area. The noted hydrothermal area lies within the 10-km-wide Reporoa caldera, which was formed during the Pleistocene in the Reporoa-Broadlands basin near the western margin of the Taupo volcanic zone. Large hydrothermal explosions took place from the Waiotapu thermal area at the time of the Kaharoa eruption of neighboring Tarawera volcano about 770 years ago.

Photo by Richard Wysoczanski, 1994 (Smithsonian Institution).

The following references have all been used during the compilation of data for this volcano, it is not a comprehensive bibliography. Discussion of another volcano or eruption (sometimes far from the one that is the subject of the manuscript) may produce a citation that is not at all apparent from the title.

Beresford S W, Cole J W, 2000. Kaingaroa Ignimbrite, Taupo volcanic zone, New Zealand: evidence for asymmetric caldera subsidence of the Reporoa caldera. New Zeal J Geol Geophys, 43: 471-481.

Houghton B F, Wilson C J N, McWilliams M O, Lanphere M A, Weaver S D, Briggs R M, Pringle M S, 1995. Chronology and dynamics of a large silicic magmatic system: Central Taupo Volcano Zone, New Zealand. Geology, 23: 13-16.

IAVCEI, 1973-80. Post-Miocene Volcanoes of the World. IAVCEI Data Sheets, Rome: Internatl Assoc Volc Chemistry Earth's Interior..

Nairn I A, Cole J W, 1975. New Zealand. Catalog of Active Volcanoes of the World and Solfatara Fields, Rome: IAVCEI, 22: 1-156.

Nairn I A, Wood C P, Bailey R A, 1994. The Reporoa caldera, Taupo Volcanic Zone: source of the Kaingaroa Ignimbrites. Bull Volc, 56: 529-537.

Spinks K D, Acocella V, Cole J W, Bassett K N, 2005. Structural control of volcanism and caldera development in the transtensional Taupo Volcanic Zone, New Zealand. J Volc Geotherm Res, 144: 7-22.

Spinks K D, Cole J W, Leonard G S, 2004. Caldera volcanism in the Taupo Volcanic Zone. Geol Soc New Zeal, New Zeal Geophys Soc, 26th New Zeal Geotherm Workshop, 6th-9th Dec 2004, Great Lake Centre, Taupo, Field Trip Guides, 7: 110-135.

Wilson C J N, Houghton B F, McWilliams M O, Lanphere M A, Weaver S D, Briggs R M, 1995a. Volcanic and structural evolution of Taupo Volcanic Zone, New Zealand: a review. J Volc Geotherm Res, 68: 1-28.

Volcano Types

Caldera
Lava dome(s)

Tectonic Setting

Subduction zone
Continental crust (> 25 km)

Rock Types

Major
Rhyolite
Andesite / Basaltic Andesite
Minor
Dacite

Population

Within 5 km
Within 10 km
Within 30 km
Within 100 km
2,920
2,920
11,513
363,602

Affiliated Databases

Large Eruptions of Reporoa Information about large Quaternary eruptions (VEI >= 4) is cataloged in the Large Magnitude Explosive Volcanic Eruptions (LaMEVE) database of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).
WOVOdat WOVOdat is a database of volcanic unrest; instrumentally and visually recorded changes in seismicity, ground deformation, gas emission, and other parameters from their normal baselines. It is sponsored by the World Organization of Volcano Observatories (WOVO) and presently hosted at the Earth Observatory of Singapore.
EarthChem EarthChem develops and maintains databases, software, and services that support the preservation, discovery, access and analysis of geochemical data, and facilitate their integration with the broad array of other available earth science parameters. EarthChem is operated by a joint team of disciplinary scientists, data scientists, data managers and information technology developers who are part of the NSF-funded data facility Integrated Earth Data Applications (IEDA). IEDA is a collaborative effort of EarthChem and the Marine Geoscience Data System (MGDS).
Smithsonian Collections Search the Smithsonian's NMNH Department of Mineral Sciences collections database. Go to the "Search Rocks and Ores" tab and use the Volcano Name drop-down to find samples.