91. Solid Earth physics
91.10.-v Geodesy and gravity
91.10.By Mathematical geodesy; general theory
91.10.Da Cartography
91.10.Fc Space geodetic surveys
91.10.Jf Topography; geometric observations
91.10.Kg Crustal movements
91.10.Lh Photogrammetry
91.10.Nj Rotational variations; polar wobble
91.10.Qm Harmonics of the gravity potential field
91.10.Rn Rheology of lithosphere and mantle
91.10.Sp Satellite orbits
91.10.Tq Earth tides
91.10.Vr Ocean/Earth/atmosphere interaction
91.10.Ws Reference systems
91.25.-r Geomagnetism and paleomagnetism; geoelectricity
91.25.Cw Origins and models of the magnetic field; dynamo theories
91.25.Dx Archeomagnetism
91.25.Ey Interactions between exterior sources and interior properties
91.25.Ga Spatial variations: all harmonics and anomalies
91.25.Jc Spatial variations attributed to sea floor spreading
91.25.Le Time variations, diurnal to secular
91.25.Mf Reversals
91.25.Ng Paleomagnetism
91.25.Ph Magnetostratigraphy
91.25.Qi Geoelectricity; electromagnetic induction and conductivity
(magnetotelluric effects)
91.30.-f Seismology
91.30.Bi Seismic sources (mechanisms, magnitude, moment frequency spectrum)
91.30.Dk Seismicity: space and time distribution
91.30.Fn Surface and body waves
91.30.Ks Free oscillations (periods less than 12 hours)
91.30.Mv Strong motions and shock waves
91.30.Nw Tsunamis (see also 92.10.D and 92.10.F for dynamics of the ocean)
91.30.Px Phenomena related to earthquake prediction
91.30.Rz Explosion seismology
91.30.Tb Volcano seismology
91.30.Vc Continental crust seismology
91.30.Ye Oceanic crust seismology
91.35.-x Earth's interior structure and properties
91.35.Cb Models of interior structure
91.35.Dc Heat flow; geothermy
91.35.Ed Structure of the Earth's interior below the upper mantle
91.35.Gf Structure of the crust and upper mantle
91.35.Lj Composition of Earth's interior
91.35.Nm Geochronology
91.35.Pn Tomography of the Earth's interior
(see also 91.30 Seismology)
91.40.-k Volcanology
91.40.Bp Ash deposits
91.40.Dr Atmospheric effects
(see also 92.60.M Particles and aerosols--in Meteorology)
91.40.Ft Eruptions
91.40.Hw Lava
91.45.-c Physics of plate tectonics
91.45.Cg Continental margins
91.45.Dh Plate tectonics
91.45.Ei Neotectonics
91.45.Fj Convection currents
91.45.Pt Slow vertical crustal movements (including isostasy and postglacial
phenomena)
91.45.Qv Tomography of plate tectonics
91.45.Sx Relations of gravity observations to tectonics and isostasy
91.45.Ty Folds and Folding
91.45.Vz Fractures and faults
91.45.Yb Pluton emplacement
91.50.-r Marine geology and geophysics
91.50.Cw Beach, coastal, and shelf processes
91.50.Ey Ocean bottom processes (for ocean basin thermometry, see 43.30.Q in
acoustics appendix)
91.50.Ga Bathymetry and noncoastal underwater morphology
91.50.Jc Turbidity currents, sedimentation (for acoustics of sediments, see
43.30.M in acoustics appendix)
91.60.-x Physical properties of rocks and minerals (see also 83.80.N - in
rheology; for rheological properties of geological materials, see
83.30)
91.60.Ba Elasticity, fracture, and flow
91.60.Dc Creep and deformation
91.60.Ed Crystal structure and defects
91.60.Fe Equations of state
91.60.Gf High-pressure behavior
91.60.Hg Phase changes
91.60.Ki Thermal properties
91.60.Lj Acoustic properties
91.60.Mk Optical properties
91.60.Pn Magnetic and electric properties
91.65.-n Geophysical aspects of geology, mineralogy, and petrology
91.65.Br Geochemical cycles
91.65.Dt Isotopic composition/chemistry
91.65.Fw Low-temperature geochemistry
91.65.Hy Organic geochemistry
91.65.Nd Trace elements
91.65.Rg Mineral occurrences and deposits
91.65.Ti Sedimentary petrology
91.65.Vj Major element composition
91.70.-c Information related to geologic time
91.70.Bf Cenozoic
91.70.Dh Mesozoic
91.70.Fj Paleozic
91.70.Hm Precambrian
91.90.+p Other topics in solid Earth physics