Related by context. Frequent words. (Click for all words.) 59 auroral 57 sunspot activity 57 geomagnetic storm 55 convective 55 aurorae 55 sunspot cycle 54 ionospheric 54 geomagnetic storms 54 aurora 54 X ray emission 53 polar vortex 52 sunspots 52 auroras 52 coronal mass ejection 51 geomagnetic 51 perturbation 51 solar irradiance 51 substorms 51 temperature gradient 50 solar flares 50 oscillation 50 sunspot 50 explosive eruptions 50 insolation 50 Earth magnetosphere 50 oscillations 49 perturbations 49 Gamma ray bursts 49 microbursts 49 solar corona 48 climatological 48 magnetic reconnection 48 cosmic ray 48 atmospheric turbulence 48 convection 48 glacial melting 48 thermosphere 48 temperature inversion 48 Sunspots 48 mid latitudes 48 radiative 47 hydrothermal activity 47 thundersnow 47 poleward 47 phenomena 47 interplanetary spacecraft 47 coronal mass ejections 47 radiative forcing 47 sunspot numbers 47 meteoroid 47 ionosphere 47 aurora borealis 47 Gamma rays 47 atmospheric methane 47 pulsations 47 ionize 47 microwave radiation 46 pulsation 46 ionised 46 geomagnetic field 46 downdrafts 46 ultraviolet UV radiation 46 lightning strikes 46 irradiance 46 solar nebula 45 storminess 45 ionisation 45 Cosmic rays 45 earth tremors 45 amplitudes 45 El Nino phenomenon 45 cloudiness 45 infrasound 45 Saturn moon Enceladus 45 upwelling 45 volcanic ash clouds 45 tornadic activity 45 #/#Z 45 CMEs 45 magnetosphere 45 overpressure 45 minima 45 ENSO 45 outgassing 44 radiations 44 magnetic fields 44 precipitations 44 barometric pressure 44 supernova explosions 44 aerosol particles 44 volcanism 44 -# degrees Fahrenheit [002] 44 volcanic activity 44 water vapor 44 meteor showers 44 equatorial Pacific Ocean 44 cirrus clouds 44 cirrus 44 El Ninos 44 polar 44 Pacific Decadal Oscillation