People’s stories can provide information. The stories show which communities need the most help during an eruption. They also reveal where roads and bridges should be built. They can help people evacuate.
I found that personal accounts in St. Vincent mirror evidence in the rock. In some areas, old writings by people described ashfall. There, the rock contained a lot of ash.
Scientists want to learn which areas are most at risk during eruptions. They usually look at rock layers. But the rock can be hard to reach. Or it may have been washed away. Instead, scientists can look at these personal accounts.