- seismometry
- seismoscope
- seismosociology
- seismotectonic province
- seismotectonics
- selective γ-γ logging
- self-potential logging, SP logging
- self-potential method
- self-reversal
- shadow zone
- shallow-focus earthquake
- shear dislocation
- shear melting
- shear wave
- Shida's number
- shipboard gravimeter
- shock absorption
- shoot statics
- short wave fadeout, SWF
- shot-geophone distance, offset
- side swipe
- Sidutjall event
- silent earthquake
- single domain particle
- site remanence
- skip distance
- slant stack
- slip function
- slip vector
- slowness
- slowness method
- slump test
- smoked paper record
- sodium layer
- solar corpuscular emission
- solar cosmic ray
- solar daily variation, S
- solar electron event
- solar proton event
- solar tide
- solar wind
- solar-terrestrial physics
- solar-terrestrial space
- solfatara
- solid Earth geophysics
- sound fixing and ranging channel, SOFAR channel
- sounding balloon
- sounding of induced polarization
- sounding rocket
- source array