For modern volcanoes, satellite data shows how much sulfur dioxide is released. When Mount Pinatubo in the Philippines erupted in 1991, it propelled roughly 15 million tons into the stratosphere.

This is Mount Pinatubo, an active stratovolcano located at the tri-point of Zambales, Tarlac and Pampanga. It had remained dormant for around 600 years until that tragic day on June 15 ...

when the Philippines’ Mount Pinatubo finally blew, after months of earthquakes and magma slowly seeping to the top. The resulting ash cloud was 22 miles (35 kilometers) high, and 20 million tons ...

Damage from volcanic ash at Clark Air Force Base in the Philippines after the June 15, 1991, eruption of Mount Pinatubo. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of ...

But with rising star Tiffany Lee lurking and the unpredictable Pinatubo course proving to be a relentless test, the battle for the title remains wide open.