When volcanoes erupt, molten rock called magma is ejected into the air where it cools and becomes volcanic ash—bits of jagged rock and glass sometimes no bigger than a few micrometers in diameter. But this ash isn’t like the ash leftover in a charcoal grill or a campfire; it’s hard, and depending on where and how it falls, it can be deadly. According to Dr. Kim Genareau, a professor in the Department of Geological Sciences, airplane pilots can’t see fine […]
Volcanic Ashfall
![](https://as.ua.edu/wp-content/uploads/2016/11/Volcano-Paul-Kim-II.jpg)