Fig. 1: Ambae Eruption: Over 390 kt of SO2 dispersed across 4000 km in the South Pacific.
From: Magmatic volatiles control the sub-plinian basaltic eruptions at Ambae volcano, Vanuatu

More than 390 kt of SO₂ were measured during the most intense eruptive phase of Ambae, dispersing across numerous South Pacific countries over a distance of 4,000 kilometers from the source. The thumbnail shows the eruptive column of July 27, 2018—photo courtesy, Veronica Legler / Peace Corps Vanuatu.