Submerged Tonga volcano leaves scientists in suspense after eruption

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Explosion destroyed its sea-level crater and drowned its mass, obscuring it from satellites

Singapore — Scientists are struggling to monitor an active volcano that erupted off the South Pacific island of Tonga at the weekend, after the explosion destroyed its sea-level crater and drowned its mass, obscuring it from satellites.

Saturday's eruption was so powerful that space satellites captured not only huge clouds of ash but also an atmospheric shockwave that radiated out from the volcano at close to the speed of sound. The unusual “astounding” speed and force of the eruption indicated a greater force at play than simply magma meeting water, scientists said.

The Tonga Geological Services agency, which was monitoring the volcano, was unreachable on Monday. Most communications to Tonga have been cut after the main undersea communications cable lost power.American meteorologist Chris Vagasky studied lightning around the volcano and found it increasing to about 30,000 strikes in the days leading up to the eruption. On the day of the eruption, he detected 400,000 lightning events in just three hours, which comes down to 100 lightning events per second.

 

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