Earth science
Articles about geology, climate, oceans and the planet.
South Atlantic tropical cyclone
South Magnetic Pole
Sphalerite
Sphalerite: the primary zinc sulfide mineral
Spring (water)
Stage (geology)
Statherian
Statherian Period (1.8–1.6 billion years ago)
Steam devil
Stenian
Stone
Storegga Slide
Storegga Slide: prehistoric submarine landslides and the resulting North Atlantic tsunami
Storm
Storm (meteorological phenomenon)
Storm history of Hurricane Wilma
Meteorological history of Hurricane Wilma (October 2005)
Storm surge
Storm surge: coastal flooding caused by intense storms
Storms of My Grandchildren
Fossil Fuels, Future Generations, and Climate Risk: James Hansen's 2009 Call to Action
Strata
Stratigraphic column
Stratigraphy
Stratigraphy: Principles, History, and Applications
Stratosphere
Stratovolcano
Stratus cloud
Stromatolite
Stromatolite: microbial laminated rock formations and their significance
Structure of the Earth
Structure of the Earth: layers, composition, dynamics and boundaries
Subduction
Subduction (plate tectonics)
Submarine volcano
Subtropical cyclone
Subtropical ridge
Subtropical ridge (subtropical high-pressure belt)
Subtropical Storm Andrea (2007)
Sudbury Basin
Suiko Seamount
Suiko Seamount — extinct guyot of the Hawaiian–Emperor chain
Summer
Summer — the warm season and its causes, climates, and cultural impact
Sun angle
Sun angle (solar elevation and incidence)
Sundance Sea
Sundance Sea: Jurassic inland sea of western North America
Supercontinent
Supervolcano
Supervolcano: giant eruptions, causes, effects, and notable examples
Surface mining
Surface runoff
Surveying
Taal Volcano
Taal Volcano (Philippines)
Talc
Talc: properties, composition, uses, occurrence and safety
Tales from Earthsea
Tanzanite
Teapot Rock
Teapot Rock (Wyoming): sandstone landmark and namesake of Teapot Dome
Tectonics
Tectonics: structure, processes and significance of Earth's deforming crust
Temperature record of the past 1000 years
Temperature record of the past 1,000 years
Terraforming of Mars
Terrestrial
Terrestrial planet
Tertiary
Tertiary (historical geological term)