The explosion was heard in Samoa, roughly away before the sound travelled to more distant countries. Residents in Fiji, more than away, described the sounds of thunder, while the "thump" of the eruption was also reported in Niue and Vanuatu. Tremors and shaking buildings were reported by residents in south-western Niue, around Alofi and Avatele. The United States Geological Survey estimated the eruption at a surface-wave magnitude of 5.8. The eruption was heard more than away in New Zealand, where the sound arrived two hours later. A series of bangs were heard around 3:30 a.m. local time in and around Anchorage, Alaska, approximately away from the volcano, lasting about 30 minutes. Low-frequency noise persisted for approximately two hours. Booms were heard as far away as Yukon in Canada, away.
