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.
The eruption of Hunga-Tonga-Hunga-Ha’apai volcano, which sits on the seismically active Pacific Ring of Fire, sent tsunami waves across the Pacific Ocean and was heard some 2,300 kms (1,430 miles) away in New Zealand.
The Tonga volcano shockwave as heard from Fiji, nearly 1000 km away 😧
— Chris Combs (@DrChrisCombs) January 15, 2022
“The concern at the moment is how little information we have and that’s scary,” said Janine Krippner, a New Zealand-based volcanologist with the Smithsonian Global Volcanism Program.
“When the vent is below water, nothing can tell us what will happen next.”
Krippner said on-site instruments were likely destroyed in the eruption and the volcanology community was pooling together the best available data and expertise to review the explosion and predict anticipated future activity.
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.
two of tonga’s islands were already wiped out from the first eruption. i’m scared to find out what the second may bring. https://t.co/DIykT8noId
— bibi🌿 (@chimmychaechae) January 17, 2022
Photographs and videos showed grey ash clouds billowing over the South Pacific and meter-high waves surging onto the coast of Tonga.
There are no official reports of injuries or deaths in Tonga yet but internet and telephone communications are extremely limited and outlying coastal areas remain cut off.
Experts said the volcano, which last erupted in 2014, had been puffing away for about a month before rising magma, superheated to around 1,000 degrees Celsius, met with 20-degree seawater on Saturday, causing an instantaneous and massive explosion.
Aerial video of the first volcano eruption in #Tonga. A second explosion took place this evening.
— 🇵🇹 𝙈𝙤𝙙𝙚𝙧𝙣 𝙀𝙧𝙖 𝙉𝙚𝙬𝙨 🇪🇺 (@ModernEraNews) January 15, 2022
The unusual “astounding” speed and force of the eruption indicated a greater force at play than simply magma meeting water, scientists said.
As the superheated magma rose quickly and met the cool seawater, so did a huge volume of volcanic gases, intensifying the explosion, said Raymond Cas, a professor of volcanology at Australia’s Monash University.
Some volcanologists are likening the eruption to the 1991 Pinatubo eruption in the Philippines, the second-largest volcanic eruption of the 20th century, which killed around 800 people.
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.
The violent eruption of Hunga Tonga in the South Pacific today is pretty incredible from a meteorological standpoint.
Lightning rates from the eruption are exceeding 10,000 strikes per hour or an insane 167+ strikes per second. pic.twitter.com/VWEC2H0dwW
— US StormWatch (@US_Stormwatch) January 13, 2022
That compared with 8,000 strikes per hour during the Anak Krakatau eruption in 2018, caused part of the crater to collapse into the Sunda Strait and send a tsunami crashing into western Java, which killed hundreds of people.
Cas said it is difficult to predict follow-up activity and that the volcano’s vents could continue to release gases and other material for weeks or months.
“It wouldn’t be unusual to get a few more eruptions, though maybe not as big as Saturday,” he said. “Once the volcano is de-gassed, it will settle down.”
Meanwhile, new powerful eruption
A second major eruption has been detected at the Hunga Tonga volcano on Monday, according to an alert from Australia’s Darwin Volcanic Ash Advisory Centre.
According to satellite photographs, some outlying islands appear to have been inundated by the ocean
Mon Jan 17 2022
♆ ＡＢＹＳＳ pic.twitter.com/Gvk9wYZHtb
— ♆ＡＢＹＳＳ ℭ 𝔥 𝔯 𝔬 𝔫 𝔦 𝔠 𝔩 𝔢 𝔰 (@AbyssChronicles) January 17, 2022
The Pacific Tsunami Warning Centre also warned of large waves in the area and said: “This might be from another explosion of Tonga volcano. There are no known earthquakes of significant size to generate this wave.”
Some say it’s fake and want to cover-up:
there were some reports that there was a second big eruption but it was “a MISINTERPRETATION of the Volcanic Ash Advisory from Darwin VAAC” #tongaVolcanoEruption #tongatsunami #tongaeruption #tonga #volcano #eruption #HungaTongaHungaHaapaihttps://t.co/v7mLkPXQk8
— ቴኦቤስታ 💖💜💙 (@iteobesta) January 17, 2022
There were no casualties reported from the second eruption on Sunday night. However, evacuation measures are underway.
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