- turbulent mixing
- turning point
- tweak
- twilight
- ultrametamorphic water
- ultrasonic image logging
- unblocking field
- unblocking temperature
- underthrust zone, underthrust belt
- unified magnitude
- unilateral faulting
- up sweep
- uphole time
- upper atmosphere
- upper mantle
- variable-frequency method
- variometer
- velocity filtering
- velocity response spectrum
- Vening Meinesz isostasy
- Venus seismology
- vertical coaxial coils system
- vertical coplanar coils system
- vertical seismic profiles survey, VSP survey
- vertical stacking
- very low frequency band radiated field system
- very low frequency method, VLF method
- virtual geomagnetic pole, VGP
- virtual height
- viscous remanent magnetization,VRM, viscous remanence
- volcanic earthquake
- volcanic water
- volcano-geothermal region
- Wadati diagram
- water bottom event
- wave equation migration
- wavelet processing
- weighted stack
- well fluid logging, mud logging
- well shooting
- Wenner array
- Wentzel-Kramers-Brillouin-Jeffreys method, WKBJ method
- wet model
- whistler
- wide angle common depth point, WACDP
- wide line profile
- wide-angle reflection
- Wiechert seismograph
- Willmore seismograph
- wind shear