On January 15 last year, Tongan resident Marika Moala was walking her dog along the beach when she noticed a "very weird" cloud formation on the horizon.
"My dog kept barking and I'm like, 'What's wrong, are you hungry or something?'" she said.
"I told my sister 'There's something really weird. There are these big clouds. It's growing and when we arrived at her house, the mushroom cloud was on top of us."
