Volcano Eruption Triggers Acid Rain Across Vanuatu

Authorities in Vanuatu are monitoring increased volcanic activity on Ambae Island after an eruption began producing ash clouds and acid rain affecting several nearby islands.

The Manaro Voui volcano, located on Ambae Island about 310 kilometres northwest of the capital Port Vila, has been emitting ash and volcanic gases following a recent surge in activity.

Officials from the Vanuatu Meteorology and Geo-Hazards Department have raised the volcano to Alert Level 3, indicating a minor eruption with the potential for further escalation.

Scientists say the eruption is releasing large amounts of sulfur dioxide gas and ash, which combine with moisture in the atmosphere to form acid rain. The rain has reportedly spread beyond Ambae, reaching nearby islands including Espiritu Santo, Malakula, Pentecost and Ambrym.

Authorities warn that the acidic rainfall can damage crops, contaminate water supplies and affect agriculture, particularly when it falls into uncovered rainwater tanks and wells.

According to officials, the acidic precipitation can “burn crops and anything it comes into contact with,” while also lowering the pH levels of surface water sources.

Residents on Ambae have also reported heavy ash fall, with winds spreading volcanic ash across large parts of the island. Scientists say ash plumes have risen more than four kilometres into the atmosphere during the current eruption.

The Vanuatu government is closely monitoring the situation and has maintained a danger zone within a three-kilometre radius of the active crater. While authorities have not yet ordered a full evacuation, contingency plans remain in place should the volcanic activity intensify.

Ambae’s Manaro Voui volcano is one of the most active volcanoes in the Pacific region and has caused major disruptions before, including evacuations of thousands of residents during previous eruptions.

Officials are urging communities to remain alert, protect drinking water supplies, and follow guidance from disaster management authorities as monitoring of the volcano continues.