Global Volcanism Program

Most Recent Bulletin Report: October 1990 (BGVN 15:10) Cite this Report

Weak fumarolic emissions

"Weak fumarolic emissions were noted from the SE side of the W summit crater during an overflight in early September. No unusual activity was observed."

Information Contacts: C. McKee and I. Itikarai, RVO.

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

Bulletin Reports - Index

Reports are organized chronologically and indexed below by Month/Year (Publication Volume:Number), and include a one-line summary. Click on the index link or scroll down to read the reports.

10/1990 (BGVN 15:10) Weak fumarolic emissions

Information is preliminary and subject to change. All times are local (unless otherwise noted)

October 1990 (BGVN 15:10) Cite this Report

Weak fumarolic emissions

"Weak fumarolic emissions were noted from the SE side of the W summit crater during an overflight in early September. No unusual activity was observed."

Information Contacts: C. McKee and I. Itikarai, RVO.

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.

Cones

Feature Name

Feature Type

Elevation

Latitude

Longitude

Galloseulo
    Ibi
    Richthofen
    Eve

Stratovolcano

1148 m

5° 20' 0" S

151° 6' 0" E

Basic Data

Volcano Number

Last Known Eruption

Elevation

Latitude
Longitude

252100

950 CE

1148 m / 3766 ft

5.33°S
151.1°E

Volcano Morphology

Primary Landform
Composite

Volcano Types
Stratovolcano
Caldera
Lava cone

Rock Types

Major
Dacite
Andesite / Basaltic Andesite

Tectonic Setting

Subduction zone
Continental crust (> 25 km)

Population

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

84
5,093
14,613
85,504

Geological Summary

This little-known volcano is one of several major calderas on the island of New Britain. The 10 x 12 km Hargy caldera, whose floor is 150 m above sea level, contains an inner caldera with a steep west-facing wall. A caldera lake on the SE side drains through a narrow gap in the northern caldera wall. The latest caldera-forming eruption of Hargy volcano took place about 11,000 years ago. The dacitic Galloseulo lava cone rises above and partially overtops the western rim of the caldera. A double crater occupies a larger 700-m-wide crater. Numerous small eruptions have taken place at Galloseulo over the past 7000 years, the last occurring about 1000 years ago.

References

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

Cooke R J S, Johnson R W, 1978. Volcanoes and volcanology in Papua New Guinea. Geol Surv Papua New Guinea Rpt, 78/2: 1-46.

Fisher N H, 1957. Melanesia. Catalog of Active Volcanoes of the World and Solfatara Fields, Rome: IAVCEI, 5: 1-105.

Johnson R W, 1971. Bamus volcano, Lake Hargy area, and Sulu Range, New Britain: volcanic geology and petrology. Aust Bur Min Resour Geol Geophys Rec, 1971/55: 1-36.

Lolok D, McKee C O, 1993. Eruption History, Stratigraphy and Petrology of the Pyroclastic Sequence at Hargy Volcano, Papua New Guinea. IAVCEI, 1993 Canberra Mtg Abs, p 63.

Eruptive History

There is data available for 2 confirmed Holocene eruptive periods.

0950 (?) Confirmed Eruption

Episode 1 | Eruption Episode

Galloseulo

0950 (?) - Unknown

Evidence from Isotopic: 14C (uncalibrated)

List of 1 Events for Episode 1 at Galloseulo

	Start Date	End Date	Event Type	Event Remarks
	- - - -	- - - -	Explosion

5050 BCE (?) Confirmed Eruption

Episode 1 | Eruption Episode

Galloseulo

5050 BCE (?) - Unknown

Evidence from Isotopic: 14C (uncalibrated)

List of 2 Events for Episode 1 at Galloseulo

	Start Date	End Date	Event Type	Event Remarks
	- - - -	- - - -	Explosion
	- - - -	- - - -	Lava flow

Deformation History

There is no Deformation History data available for Hargy.

Emission History

There is no Emissions History data available for Hargy.

Photo Gallery

Lake Hargy (lower right) lies in the SE corner of the 10 x 12 km wide Hargy caldera. The Lobu River drains the lake through a notch in the northern caldera rim. The post-caldera cone of Galloseulo lies beneath the large cloud bank in the center of the image, about halfway from the lake to the Bismarck Sea. The Toiru River cuts across the bottom of the image. Small eruptions have taken place at Galloseulo over the past 7,000 years, the last occurring about 1,000 years ago.

NASA Landsat image, 2000 (courtesy of Hawaii Synergy Project, Univ. of Hawaii Institute of Geophysics & Planetology).

The roughly 10 x 12 km Hargy caldera is shown in this 9 January 2018 Sentinel-2 satellite image (N at the top) with Lake Hargy in the SE corner. The Galloseulo cone with its approximately 650-m-wide summit crater is also within the caldera, W of the lake.

Satellite image courtesy of Copernicus Sentinel Data, 2018.

GVP Map Holdings

Maps are not currently available due to technical issues.

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.

Smithsonian Sample Collections Database

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

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.

MIROVA

Middle InfraRed Observation of Volcanic Activity (MIROVA) is a near real time volcanic hot-spot detection system based on the analysis of MODIS (Moderate Resolution Imaging Spectroradiometer) data. In particular, MIROVA uses the Middle InfraRed Radiation (MIR), measured over target volcanoes, in order to detect, locate and measure the heat radiation sourced from volcanic activity.

MODVOLC Thermal Alerts

Using infrared satellite Moderate Resolution Imaging Spectroradiometer (MODIS) data, scientists at the Hawai'i Institute of Geophysics and Planetology, University of Hawai'i, developed an automated system called MODVOLC to map thermal hot-spots in near real time. For each MODIS image, the algorithm automatically scans each 1 km pixel within it to check for high-temperature hot-spots. When one is found the date, time, location, and intensity are recorded. MODIS looks at every square km of the Earth every 48 hours, once during the day and once during the night, and the presence of two MODIS sensors in space allows at least four hot-spot observations every two days. Each day updated global maps are compiled to display the locations of all hot spots detected in the previous 24 hours. There is a drop-down list with volcano names which allow users to 'zoom-in' and examine the distribution of hot-spots at a variety of spatial scales.

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.

Volcanic Hazard Maps

The IAVCEI Commission on Volcanic Hazards and Risk has a Volcanic Hazard Maps database designed to serve as a resource for hazard mappers (or other interested parties) to explore how common issues in hazard map development have been addressed at different volcanoes, in different countries, for different hazards, and for different intended audiences. In addition to the comprehensive, searchable Volcanic Hazard Maps Database, this website contains information about diversity of volcanic hazard maps, illustrated using examples from the database. This site is for educational purposes related to volcanic hazard maps. Hazard maps found on this website should not be used for emergency purposes. For the most recent, official hazard map for a particular volcano, please seek out the proper institutional authorities on the matter.

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 Hargy. 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 Hargy. Users can customize the data search based on station or network names, location, and time window. Requires Adobe Flash Player.

DECADE Data

The DECADE portal, still in the developmental stage, serves as an example of the proposed interoperability between The Smithsonian Institution's Global Volcanism Program, the Mapping Gas Emissions (MaGa) Database, and the EarthChem Geochemical Portal. The Deep Earth Carbon Degassing (DECADE) initiative seeks to use new and established technologies to determine accurate global fluxes of volcanic CO₂ to the atmosphere, but installing CO₂ monitoring networks on 20 of the world's 150 most actively degassing volcanoes. The group uses related laboratory-based studies (direct gas sampling and analysis, melt inclusions) to provide new data for direct degassing of deep earth carbon to the atmosphere.

Large Eruptions of Hargy

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).