Here’s the Reason Why Tonga Faced Violent Volcanic Eruption

An unprecedented volcanic eruption in Tonga and a subsequent tsunami near the island immediately caught the world’s attention.

Tongan government said there were three fatalities and many missing people after the calamity due to the Hunga-Tonga-Hunga-Ha’apai volcano on Jan. 15. The island in which homes were hard-hit harbors approximately 100,000 residents.

“If you don’t know, the island of Tonga is flat. This leaves their people with nowhere of realistic safety to evacuate,” Blake Smith-Tatafu, a Tongan-Australian living in Australia depicted the troublesome period of time in Tonga, according to The Guardian. “Villages completely underwater. We haven’t had contact for hours now. This is a crisis.”

An article published on The Conversation revealed the reason why the Tonga volcano violently erupted. There were two similar events in 2009 and 2015 but not as severe as the last one, which is probable to happen every thousand years.

“If magma rises into seawater slowly, even at temperatures of about 1200℃, a thin film of steam forms between the magma and water. This provides a layer of insulation to allow the outer surface of the magma to cool,” according to the article.

However, this course is disabled as magma erupts “of the ground full of volcanic gas.” Steam tiers are deranged in the case of magma comes into contact with water. This process is called “fuel-coolant interaction,” similar to chemical weapon explosions, the article says.

Maxar

Tonga volcano has left behind a significant damage

It is obvious that enormous eruptions dismantle magma, marking the beginning of an array of chain reactions. Also, there is a process of repetition of blasts. Following that mechanism, violent explosions occur at supersonic speeds.

According to the article in The Conversation, scientists who were involved in the research reckon that “the small eruptions represent the magma system slowly recharging itself to prepare for a big event.”

Coastline and roads on the island were submerged due to the tsunami that originated from the Tonga volcano. The violent volcanic eruption also alarmed other Pacific Island countries in addition to New Zealand, Japan, and Peru as well as the United States and British Columbia. People in Fiji escaped to higher areas of the country to avoid floods. Ash clouds rising from the eruption caused flights from New Zealand, Australia, and Fiji to Tonga to be delayed.

The aforementioned article warned that there are unknowns about the condition of Tonga after the explosion because the clouds covered the island.

“It remains unclear if this is the climax of the eruption,” the piece points out. “Hence we could be in for several weeks or even years of major volcanic unrest from the Hunga-Tonga-Hunga-Ha’apai volcano.”