.20am: Experts in New Zealand have described the large eruption as “very significant” and “remarkable”.
Dr Emily Lane from NIWA described it as “very significant” due to the eruption cloud and shock wave being captured by satellite, the eruption being heard in New Zealand and the tsunami being recorded on gauges here, more than 2500km away.
Professor Shane Cronin from the University of Auckland’s School of Environment said the eruption was “remarkable” for the same reasons.
“This suggests the eruption of large volumes of gas-charged magma at Hunga volcano,” he said.
“The January 15 eruption is so large that it is likely to be an event that alters the caldera … Further eruptions from this caldera during this episode could generate new tsunami and widespread ashfall, especially if there caldera has further collapses or landslides.”
Cronin said “significant” ashfall was likely in Tongatapu as well as the Ha’apai group of island
The sky in Tonga has been described on social media as "pitch black" thanks to ashfall.