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Managlase Volcano | Dr John Seach
Last updated: January 2026
Oro Province,
Papua New Guinea
9.08 S, 148.33 E
summit elevation ~1342 m
Volcanic field
Managlase is a triangular volcanic plateau (~460-1070 m altitude) located ~35 km southeast of Popondetta in Oro Province. The eastern part features numerous youthful volcanic landforms, including a line of high ash cones culminating at Mt Manna (1128 m). Local oral traditions record activity from Kururui cinder cone and a nearby explosion crater.
Warning: Managlase is considered dormant with undated Holocene activity preserved in oral traditions. Future eruptions could produce explosive ash emissions and local pyroclastic flows. The broader Oro Province region includes highly active volcanoes (e.g., Mt Lamington, Victory) with frequent hazards.
Geology and Volcanology
Managlase is a dispersed volcanic field with monogenetic ash cones and craters formed during Holocene explosive activity. The plateau contrasts with nearby large stratovolcanoes (Lamington, Victory). No active geothermal features are reported. Due to its inactive status and remoteness, monitoring relies on regional seismic networks and satellite data from the Rabaul Volcano Observatory.
Current Activity (January 2026)
No volcanic activity has been recorded at Managlase in historical times. Satellite observations show no thermal anomalies, gas emissions, or signs of unrest. The volcanic field remains dormant.
Eruption History
Undated Holocene eruptions formed the ash cones and craters, with activity from Kururui cinder cone preserved in local oral traditions. No historical events are confirmed.
Further reading
Smith, I.E., 1982. Volcanic evolution in eastern Papua. Tectonophysics, 87(1-4), pp.315-333.
Managlase Volcano Eruptions
Holocene (undated, recorded in oral traditions)
No historical eruptions