USING ONLINE GIS RESOURCES TO TEACH NATURAL DISASTERS

When we look at a map or figure, we intuitively look for patterns based on the size, shape, and proximity of the illustrated objects. Patterns in geologic data can provide valuable insight into how earth processes operate. Investigating spatial data with students can help them to visualize these processes and engage them in learning about the geologic mechanisms that can cause natural hazards and disasters. Geographic information systems (GIS) are valuable tools that allow students to interact with geologic data to quickly create maps and analyze data. Using GIS in the classroom helps students think critically about the geologic information, and enhances their understanding of spatial relationships. A study of natural disasters provides a hook for students to understand geologic processes because these events have significant impacts on society. In this exercise students investigate where and why earthquakes occur and how they can impact nearby populations. ArcGIS Online is a useful and simple tool to create maps with earthquake data provided through the website or collected by individual students. This site allows them to change the symbols to represent the magnitude or timing of events and look for patterns created by plate tectonics. Students can also investigate the spatial relationships between earthquakes, plate boundaries, and human populations using buffers or queries. Hazards can be assessed with population data, for example, population density, using ArcGIS online maps or other data sources. Online tools also make it easy for students to share their work for peer evaluation.