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Loloru

Photo of this volcano
  • Papua New Guinea
  • Melanesia and Australia
  • Pyroclastic shield
  • 1050 BCE
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 6.52°S
  • 155.62°E

  • 1887 m
    6191 ft

  • 255030
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

Most Recent Bulletin Report: August 1995 (BGVN 20:08) Citation IconCite this Report

Weak to moderate steaming, but sublimate deposits in possible decline

An aerial inspection took place after the 16 August, M 7.8 earthquake 200 km to the NW. Weak-to-moderate, white vapor emissions were observed from the main fumarole field in a valley on the N flank of the summit lava dome. Sublimate deposits in the valley appeared to be less extensive than when last inspected in 1989. The lake at Loloru's summit appeared normal. There was no discoloration of lake water and the level of water appeared to be unchanged.

Information Contacts: Patrice de Saint-Ours and Ben Talai, RVO.

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

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.

10/1984 (SEAN 09:10) Solfataras active on dome and flank

04/1988 (SEAN 13:04) Higher fumarole temperature; sulfur ejected

08/1995 (BGVN 20:08) Weak to moderate steaming, but sublimate deposits in possible decline




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


October 1984 (SEAN 09:10) Citation IconCite this Report

Solfataras active on dome and flank

"Aerial inspection showed that dome and flank solfataras were active as normal. Water temperature most recently recorded in a pool by the stream draining the caldera lake was 80°C."

Information Contacts: K. McCue, Bougainville Copper Ltd.


April 1988 (SEAN 13:04) Citation IconCite this Report

Higher fumarole temperature; sulfur ejected

"The main thermal area on the middle NE flank of the dome was visited on 25 April. A temperature of 108°C was measured at the main fumarole, which was surrounded by a mound of sulphur ~1 m high. Measurements since 1964 had obtained maximum temperatures of 93-97°C. Emissions from this fumarole formed a column up to 20 m high, and were accompanied by a low roaring sound. Both H2S and SO2 were detected, and occasional droplets of molten sulphur were ejected."

Information Contacts: D. Lolok, C. McKee, and B. Talai, RVO.


August 1995 (BGVN 20:08) Citation IconCite this Report

Weak to moderate steaming, but sublimate deposits in possible decline

An aerial inspection took place after the 16 August, M 7.8 earthquake 200 km to the NW. Weak-to-moderate, white vapor emissions were observed from the main fumarole field in a valley on the N flank of the summit lava dome. Sublimate deposits in the valley appeared to be less extensive than when last inspected in 1989. The lake at Loloru's summit appeared normal. There was no discoloration of lake water and the level of water appeared to be unchanged.

Information Contacts: Patrice de Saint-Ours and Ben Talai, 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.

Eruptive History

There is data available for 6 Holocene eruptive periods.

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
1050 BCE (?) Unknown Confirmed   Radiocarbon (uncorrected)
1260 BCE ± 300 years Unknown Confirmed   Radiocarbon (uncorrected)
2150 BCE (?) Unknown Confirmed   Radiocarbon (uncorrected)
3150 BCE (?) Unknown Confirmed   Radiocarbon (uncorrected)
4150 BCE (?) Unknown Confirmed   Radiocarbon (uncorrected)
6950 BCE (?) Unknown Confirmed   Radiocarbon (uncorrected)
Deformation History

There is no Deformation History data available for Loloru.

Emission History

There is no Emissions History data available for Loloru.

Photo Gallery

The summit of Loloru volcano on SE Bougainville Island is truncated by two nested calderas. A forested lava dome restricts a crescent-shaped lake to the eastern side of the younger caldera. Loloru is constructed within the 10 x 15 km Pleistocene Laluai caldera; part of the rim of this outer caldera is seen at the lower right. Pyroclastic flows from the volcano cover much of the southern part of the island. The most recent of several major Holocene explosive eruptions at Loloru took place about 3000 years ago.

Photo by Wally Johnson, 1988 (Australia Bureau of Mineral Resources).
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: Buin
Publisher: PNG & SI Topo Survey
Country: PNG / Sol I
Year: 1985
Series: T601
Map Type: Topographic
Scale: 1:100,000
Map of Buin
Title: Sol-I Region, Topo of the
Publisher: USGS-CCOP/SOPAC S. Pacific Project
Country: Solomon Is
Year: 1983
Map Type: Bathymetric
Scale: 1:1,800,000
Map of Sol-I Region, Topo of the
Title: Sol-I Region, Topo Bet 6 30-10 S, 156-158 30 E
Publisher: USGS-CCOP/SOPAC S. Pacific Project
Country: Solomon Is
Year: 1983
Map Type: Bathymetric
Scale: 1:500,000
Map of Sol-I Region, Topo Bet 6 30-10 S, 156-158 30 E
Title: Sol-I Region, Topo Bet 4 30-8 S, 154-156 E
Publisher: USGS-CCOP/SOPAC S. Pacific Project
Country: Solomon Is
Year: 1983
Map Type: Bathymetric
Scale: 1:500,000
Map of Sol-I Region, Topo Bet 4 30-8 S, 154-156 E
Title: Sol-I to New Hebrides Islands, S Pacific
Publisher: US Naval Oceanographic Office
Country: Solomon Is
Year: 1973
Map Type: Bathymetric
Scale: 1:1,660,000
Map of Sol-I to New Hebrides Islands, S Pacific
Title: Geol Map of British Solomon Islands
Publisher: DOS
Country: Solomon Is
Year: 1969
Series: Geol
Map Type: Geology
Scale: 1:1,000,000
Map of Geol Map of British Solomon Islands
Smithsonian Sample Collections Database

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

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