Via Strangesounds.org Seen in the headline image above: Lava flow along the Klyuchevskaya Sopka, Kamchatka volcano, Russia on April 26, 2016. The volcanic season is underway with eruptions in different countries across the world. While volcanoes may not have "seasons" as we know them, scientists have started to discern intriguing patterns in their activity. So what is causing eruptions? Eruptions caused by changing Earth's rotation rates Due to factors like the gravitational pull of the sun and moon, the speed at which the Earth rotates constantly changes. The length of a day actually varies from year to year, but in the order of milliseconds. In February 2014, a study showed that, since the early 19th century, changes in the Earth's rotation rate tended to be followed by increases in global volcanic activity. Eruptions caused by climate change In the past, periods of severe loss of glaciers were followed by a significant spike in volcanic activity. And this is what is happening right