Sulphur and lightning on 4th day of Hunga's eruption

Sulphur dioxide emitted from the Hunga Tonga-Hunga Ha'apai volcano continues to spread over the Ha'apai, Vava'u and Niuatoutapu groups drifting NNE at a high altitude of 8-14km. Tonga Geological Services said S02 measured highest near the ‘Otumu‘omu‘a Group. However, the steam cloud formation from the eruption has reduced significantly from yesterday.