|Elevation||1,885 m (6,184 ft)|
|Age of rock||unknown|
Mandalagan is located at latitude 10.65° North (10°39'0"N), longitude 123.25° East (123°15'0"E), in the province of Negros Occidental, on the north of the island of Negros, Region VI, of the Philippines.
Elevation is 1885 metres (6,184 feet), with a base diameter of 26 kilometres.
Volcanic activity is reported to include seven volcanic centres, at least five craters and/or calderas up to 2 klms in diameter, and a vigorous solfataric area at the highly altered volcanic dome structure.
One solfataric area emits a high-temperature (106 degrees C) plume to 30 m height with a roaring noise like a high-pressure geothermal borehole.
The Smithsonian listing has a satellite photograph of the general area.
Mandalagan is part of the Negros Volcanic Belt.
Rock type is principally andesitic with some dacitic
A Crater located near the center called "Tinagong Dagat", where hiking tourists stay
The most recent eruption produced a thin basaltic lava flow, but it is not known when this is likely to have occurred.
Philippine Institute of Volcanology and Seismology (PHIVOLCS) lists Mandalagan as potentially active.
The Smithsonian Global Volcanism Program lists Mandalagan as fumarolic.
- List of active volcanoes in the Philippines
- List of potentially active volcanoes in the Philippines
- List of inactive volcanoes in the Philippines
- Philippine Institute of Volcanology and Seismology