Tonga volcano eruption unlikely to cool Earth, study confirms

The Hunga Tonga volcanic eruption that shook the South Pacific Ocean in January will not affect Earth’s climate despite sending clouds of ash dozens of miles high into the atmosphere, a new study confirmed. 

Powerful volcanic eruptions, such as the one that ripped apart the uninhabited Polynesian island of Hunga Tonga-Hunga Ha’apai on Jan. 15, sometimes cause short-term cooling of the planet. But this won’t be the case of the recent mega-eruption, in spite of the fact that it spewed volcanic ash into record altitudes of more than 25 miles (40 kilometers).