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
|
|---|
| Sun: Sunspots
| 21
|
| Sun: Solar Cycle
| 20
|
| Sunspots [S]
| 20
|
| Sun: Astrophysics - Solar And Stellar Astrophysics
| 17
|
| Sun: Statistics
| 16
|
| Sun: Observations
| 15
|
| Solar Activity
| 14
|
| Solar Cycle
| 11
|
| Sun: Activity
| 11
|
| Sunspot Number
| 10
|
| Astrophysics - Solar And Stellar Astrophysics [S]
| 10
|
| Sun: Sunspot Number
| 7
|
| Maunder Minimum
| 6
|
| The Sun [S]
| 6
|
| Sun: General
| 5
|
| Sun: Solar Activity
| 5
|
| Sunspot Cycle
| 4
|
| Historical Records
| 4
|
| Sun: Filaments [S]
| 4
|
| Sunspot Groups
| 4
|
| Astronomical Data Bases: Miscellaneous
| 4
|
| Solar-terrestrial Relations
| 3
|
| Astronomy Databases
| 3
|
| Physics - History And Philosophy Of Physics
| 2
|
| Solar-terrestrial Interactions
| 2
|
| Sun: Physics - History And Philosophy Of Physics
| 2
|
| Extremadura
| 2
|
| Sun: Machine Learning
| 2
|
| Catalogs
| 2
|
| Sun: Maunder Minimum
| 2
|
| Aurora
| 2
|
| Sun: Sunspot Area
| 2
|
| Sun: Fourier Transform
| 2
|
| Sun: Time Series Analysis
| 2
|
| History And Philosophy Of Astronomy
| 2
|
| Sun: Flares [S]
| 2
|
| Solar-terrestrial Physics
| 1
|
| Solar Storm
| 1
|
| Solar Radius
| 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
|