метеорологическая служба(Prior to the largest eruption, the volcano had been erupting for several days. The Tonga Meteorological Agency had warned that the smell of sulphur and ammonia was being reported in some areas.
bbc.comAndrey Truhachev)
Росгидромет(The report by the Russian meteorological service, Roshydrome[t], is the first official data from the country supporting the French report. BBC Alexander Demidov)