The table below shows the most common keywords used by the author. The letters in brackets after some keywords denote if the keyword corresponds to Solar Physics (S) or Heliospheric Physics (H).
| Keyword
| Occurrences
|
|---|
| Sunspots [S]
| 23
|
| Sun: Sunspots
| 21
|
| Sun: Solar Cycle
| 20
|
| Sun: Astrophysics - Solar And Stellar Astrophysics
| 17
|
| Sun: Statistics
| 16
|
| Sun: Observations
| 15
|
| Solar Activity
| 15
|
| Solar Cycle
| 13
|
| Sunspot Number
| 12
|
| Sun: Activity
| 11
|
| Astrophysics - Solar And Stellar Astrophysics [S]
| 10
|
| The Sun [S]
| 9
|
| Sun: Sunspot Number
| 7
|
| Maunder Minimum
| 6
|
| Sun: General
| 5
|
| Sun: Solar Activity
| 5
|
| Sunspot Groups
| 5
|
| Astronomical Data Bases: Miscellaneous
| 4
|
| Sun: Filaments [S]
| 4
|
| Historical Records
| 4
|
| Astronomy Databases
| 4
|
| Sunspot Cycle
| 4
|
| Solar-terrestrial Relations
| 3
|
| Physics - History And Philosophy Of Physics
| 2
|
| Sun: Physics - History And Philosophy Of Physics
| 2
|
| Sun: Time Series Analysis
| 2
|
| Extremadura
| 2
|
| Sun: Flares [S]
| 2
|
| Sun: Machine Learning
| 2
|
| Catalogs
| 2
|
| Solar-terrestrial Interactions
| 2
|
| Aurora
| 2
|
| Sun: Maunder Minimum
| 2
|
| Sun: Sunspot Area
| 2
|
| History And Philosophy Of Astronomy
| 2
|
| Sun: Fourier Transform
| 2
|
| Solar-terrestrial Physics
| 1
|
| Solar Storm
| 1
|
| Solar Radius
| 1
|
| Solar Physics [S]
| 1
|
| Solar Phenomena
| 1
|
| Solar Observations
| 1
|
| Solar Activity Prediction
| 1
|
| Reanalysis
| 1
|
| Portugal
| 1
|
| Meteorological Observations
| 1
|
| Angelo Secchi
| 1
|
| Machine Learning
| 1
|
| Image Processing
| 1
|
| Iberian Peninsula
| 1
|
| Historical Data
| 1
|
| Historical Climatology
| 1
|
| Historic Solar Observations
| 1
|
| Guadiana Basin
| 1
|
| Geomagnetic Fields
| 1
|
| Floods
| 1
|
| Fast Fourier Transform
| 1
|
| Extreme Events
| 1
|
| Earth
| 1
|
| Climate
| 1
|
| Automatic Detection
| 1
|
| Astronomical Databases: Miscellaneous
| 1
|
| Tripero River
| 1
|
| Time Series Analysis
| 1
|
| Sun: Zürich Classification
| 1
|
| Sun: Umbra
| 1
|
| Sun: Sunspot-number Series
| 1
|
| Sun: Sunspot Observations
| 1
|
| Sun: Sunspot Catalogue
| 1
|
| Sun: Sunspot
| 1
|
| Sun: Sun: Sunspots
| 1
|
| Sun: Sun: General
| 1
|
| Sun: Sun: Activity
| 1
|
| Sun: Sun
| 1
|
| Sun: Structure
| 1
|
| Sun: Solar Radius
| 1
|
| Sun: Solar Observations
| 1
|
| Sun: Solar Hemisphere
| 1
|
| Sun: Solar Cycle 9
| 1
|
| Sun: Solar Cycle 8
| 1
|
| Sun: Solar Cycle 25
| 1
|
| Sun: Solar Activity Forecast
| 1
|
| Sun: Rotation [S]
| 1
|
| Sun: Physics - Space Physics
| 1
|
| Sun: Penumbrae
| 1
|
| Sun: Parma
| 1
|
| Sun: Neural Network
| 1
|
| Sun: Morphological Classification Of Sunspots
| 1
|
| Sun: Models
| 1
|
| Sun: Hemispheric Sunspot Number
| 1
|
| Sun: Group Sunspot Number
| 1
|
| Sun: Galactic
| 1
|
| Sun: Cosmic Rays
| 1
|
| Sun: Cortie Classification
| 1
|
| Sun: Coronal Mass Ejections
| 1
|
| Sun: Active Region
| 1
|
| Spectroheliograms
| 1
|
| Space Weather
| 1
|
| Madrid Astronomical Observatory
| 1
|