1 - Seismology — the study of earthquakes 1 - Volcanology — the study of volcanoes 1 - Geography — the study of topography and bathymetry (on the seafloor) 1 - Geochronology — the study of the ages of rock formation 2 - Seismology — the study of earthquakes 2 - Volcanology — the study of volcanoes 2 - Geography — the study of topography and bathymetry (on the seafloor) 2 - Geochronology — the study of the ages of rock formation 3 - Seismology — the study of earthquakes 3 - Volcanology — the study of volcanoes 3 - Geography — the study of topography and bathymetry (on the seafloor) 3 - Geochronology — the study of the ages of rock formation 4 - Seismology — the study of earthquakes 4 - Volcanology — the study of volcanoes 4 - Geography — the study of topography and bathymetry (on the seafloor) 4 - Geochronology — the study of the ages of rock formation 5 - Seismology — the study of earthquakes 5 - Volcanology — the study of volcanoes 5 - Geography — the study of topography and bathymetry (on the seafloor) 5 - Geochronology — the study of the ages of rock formation 6 - Seismology — the study of earthquakes 6 - Volcanology — the study of volcanoes 6 - Geography — the study of topography and bathymetry (on the seafloor) 6 - Geochronology — the study of the ages of rock formation 7 - Seismology — the study of earthquakes 7 - Volcanology — the study of volcanoes 7 - Geography — the study of topography and bathymetry (on the seafloor) 7 - Geochronology — the study of the ages of rock formation 8 - Seismology — the study of earthquakes 8 - Volcanology — the study of volcanoes 8 - Geography — the study of topography and bathymetry (on the seafloor) 8 - Geochronology — the study of the ages of rock formation