We are pleased to welcome Ryan Hill to speak at a HotStuff seminar on: Caldera formation on Earth and on Io.

Abstract:

Collapse calderas are a common volcanic structure on Earth as well as many other solar bodies such as Venus and Mars. These structures may have been observed on Io, however, it is impossible to know if these structures are associated with collapse into a magma chamber so are known as patera. In this study we compare the diameters and appearance of the 417 Ionian patera and the 783 calderas on Earth. Viewing the changes in power laws and comparing their coefficient of determination (R²) values, Ryan concludes that the patera are a form of collapse calderas and the patera with a diameter above 53km have strong tectonic influence and may perhaps resemble graben calderas that are found on Earth.