Loloru

Photo of this volcano
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 6.52°S
  • 155.62°E

  • 1887 m
    6189 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.

Eruptive History


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


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)

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.

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.

Smithsonian Sample Collections Database


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

Affiliated Sites