- Classical and Quantum Gravitation, Relativity Theory 13
- Astronomy, Astrophysics and Cosmology 8
- Astrophysics and Astroparticles 6
- Theoretical, Mathematical and Computational Physics 6
- Differential Geometry 5
- Hydrogeology 5
- Quantum Physics 5
- Geotechnical Engineering & Applied Earth Sciences 4
- Soil Science & Conservation 4
- Astronomy, Observations and Techniques 2
- Atmospheric Protection/Air Quality Control/Air Pollution 2
- Civil Engineering 2
- Classical and Continuum Physics 2
- Climate Change/Climate Change Impacts 2
- Cosmology 2
- Environment, general 2
- Geophysics/Geodesy 2
- Hydrology/Water Resources 2
- Industrial Chemistry/Chemical Engineering 2
- Measurement Science and Instrumentation 2