Spectacular eruption, which created massive sonic boom heard as far as Alaska, cut off internet in the island nation, which saw large waves; no official reports of injuries, deaths

No immediate reports on injuries or extent of damage in Pacific nation of Tonga, near eruption site, as all internet connectivity lost

With underwater drones using sonar technology, oceanographers map 'staggering' amounts chemical waste on seafloor between Santa Catalina Island and Los Angeles coast