Global Volcanism Program

The Global Volcanism Program has no activity reports available for Reporoa.

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

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

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

Basic Data

Volcano Number

Last Known Eruption

Elevation

Latitude
Longitude

241060

Pleistocene

592 m / 1,942 ft

38.42°S
176.33°E

Morphology

Volcano Landform
Caldera

Volcano Types
Caldera
Lava dome(s)

Rock Types

Major
Rhyolite
Andesite / Basaltic Andesite

Minor
Dacite

Tectonic Setting

Subduction zone
Continental crust (> 25 km)

Population

Within 5 km
Within 10 km
Within 30 km
Within 100 km

2,920
2,920
11,513
363,602

Geological Summary

The 10 x 15 km Reporoa caldera, occupying the Reporoa-Broadlands basin, lies near the W margin of the Taupo volcanic zone SSW of the Okataina volcanic center. The caldera formed about 230,000 years ago during the eruption of the voluminous ~100 km³ Kaingaroa Ignimbrite. Large slump scarps cut the N caldera rim; the S rim is buried by sediments. The Deer Hill rhyolitic lava dome was erupted after the caldera's S rim collapse; 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 N and S of the poorly defined caldera margin. Eruptions within the caldera have not occurred since the late Pleistocene, but large hydrothermal explosions occurred at the Waiotapu thermal area immediately to the N at the time of the Kaharoa eruption of neighboring Tarawera volcano about 770 years ago.

References

The following references have all been used during the compilation of data for this volcano, it is not a comprehensive bibliography.

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 Volcanol, 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. Volcanol. 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, 1995. Volcanic and structural evolution of Taupo Volcanic Zone, New Zealand: a review. J. Volcanol. Geotherm. Res., 68: 1-28.

Eruptive History

The Global Volcanism Program is not aware of any Holocene eruptions from Reporoa. If this volcano has had large eruptions (VEI >= 4) prior to 12,000 years ago, information might be found on the Reporoa page in the LaMEVE (Large Magnitude Explosive Volcanic Eruptions) database, a part of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).

Deformation History

There is no Deformation History data available for Reporoa.

Emission History

There is no Emissions History data available for Reporoa.

Photo Gallery

Steaming Champagne Pool is one of many thermal features of the 10-km-wide Reporoa caldera. The caldera was formed about 230,000 years ago during the eruption of the Kaingaroa ignimbrite. No eruptions have occurred since the Pleistocene in the caldera, but hydrothermal explosions took place in the Waiotapu thermal field north of the caldera at the time of the Kaharoa eruption of the Okataina volcanic centre about 800 years ago. The Broadlands (Ohaki) hydrothermal field is located south of the poorly defined caldera margin.

Copyrighted photo by Katia and Maurice Krafft, 1986.

Bubbling mud pots at a thermal area of New Zealand's Reporoa caldera form geometric patterns. Mud pots form in thermal areas where the gas phase is dominant over the liquid phase and extensive hydrothermal alteration of rocks has occurred, producing fine-grained, clay-rich material.

Copyrighted photo by Katia and Maurice Krafft, 1986.

Multi-colored Bridal Veil Falls were formed from silica terraces created when mineralized water poured over from the Primrose Pool of the Wai-O-Tapu 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 Wai-O-Tapu thermal area at the time of the Kaharoa eruption of neighboring Tarawera volcano (Okataina Volcanic Centre) about 700 years ago.

Photo by Richard Wysoczanski, 1994 (Smithsonian Institution).

GVP Map Holdings

Maps are not currently available due to technical issues.

Smithsonian Sample Collections Database

The following 10 samples associated with this volcano can be found in the Smithsonian's NMNH Department of Mineral Sciences collections, and may be availble for research (contact the Rock and Ore Collections Manager). Catalog number links will open a window with more information.

Catalog Number	Sample Description	Lava Source	Collection Date
NMNH 116418-1	Ignimbrite	WAIOTAPU	--
NMNH 116566-1	Volcanic Rock	BROADLANDS	--
NMNH 116566-2	Volcanic Rock	BROADLANDS	--
NMNH 116566-3	Volcanic Rock	BROADLANDS	--
NMNH 116566-4	Volcanic Rock	BROADLANDS	--
NMNH 116566-5	Volcanic Rock	BROADLANDS	--
NMNH 116566-6	Volcanic Rock	BROADLANDS	--
NMNH 116566-7	Volcanic Rock	BROADLANDS	--
NMNH 116566-8	Volcanic Rock	BROADLANDS	--
NMNH 116566-9	Volcanic Rock	BROADLANDS	--

External Sites

Copernicus Browser

The Copernicus Browser replaced the Sentinel Hub Playground browser in 2023, to provide access to Earth observation archives from the Copernicus Data Space Ecosystem, the main distribution platform for data from the EU Copernicus missions.

WOVOdat
   Single Volcano View
   Temporal Evolution of Unrest
   Side by Side Volcanoes

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.

GVMID Data on Volcano Monitoring Infrastructure The Global Volcano Monitoring Infrastructure Database GVMID, is aimed at documenting and improving capabilities of volcano monitoring from the ground and space. GVMID should provide a snapshot and baseline view of the techniques and instrumentation that are in place at various volcanoes, which can be use by volcano observatories as reference to setup new monitoring system or improving networks at a specific volcano. These data will allow identification of what monitoring gaps exist, which can be then targeted by remote sensing infrastructure and future instrument deployments.

IRIS seismic stations/networks

Incorporated Research Institutions for Seismology (IRIS) Data Services map showing the location of seismic stations from all available networks (permanent or temporary) within a radius of 0.18° (about 20 km at mid-latitudes) from the given location of Reporoa. Users can customize a variety of filters and options in the left panel. Note that if there are no stations are known the map will default to show the entire world with a "No data matched request" error notice.

UNAVCO GPS/GNSS stations

Geodetic Data Services map from UNAVCO showing the location of GPS/GNSS stations from all available networks (permanent or temporary) within a radius of 20 km from the given location of Reporoa. Users can customize the data search based on station or network names, location, and time window. Requires Adobe Flash Player.

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).

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).