Related by context. Frequent words. (Click for all words.) 62 geomagnetic 60 sunspot cycle 59 sunspot numbers 57 geomagnetic storms 55 sunspot activity 55 ionosphere 55 oscillations 55 equatorial Pacific Ocean 55 Earth magnetosphere 55 magnetosphere 54 X ray emission 54 sunspot 53 sunspots 53 substorms 53 mid latitudes 53 atmospheric circulation 53 auroral 53 geomagnetic storm 52 hydrological cycle 52 convective 51 meteoroids 51 solar flares 51 cosmic rays 50 oscillation 50 coronal mass ejection 50 perturbation 50 Geminids 50 storminess 50 comet nucleus 50 vertical wind shear 50 aerosol particles 50 Southerly winds 50 perturbations 49 Perseids 49 thermosphere 49 lithosphere 49 radiative 49 ionospheric 49 ejecta 49 dynamical 49 anisotropy 49 troposphere 48 cosmic ray 48 amplitudes 48 magnetic fields 48 irradiance 48 GeV 48 interstellar dust 48 heaviest precipitation 48 coronal mass ejections 48 terrestrial ecosystems 48 galaxy cluster 48 equatorial Pacific 48 interglacial 48 Saturn rings 48 equinoxes 47 occultation 47 orbits 47 COROT 47 volcanic gases 47 polar caps 47 aurora 47 ecliptic 47 Grimsvotn 47 anticyclone 47 magmatic 47 galaxy formation 47 CALIPSO 47 heliosphere 46 constellation Leo 46 northeasterly 46 fluxes 46 auroras 46 southeasterly 46 infrared radiation 46 silicates 46 interstellar medium 46 Wind shear 46 El Ninos 46 volcanism 46 MODIS 46 magnetar 46 supermoon 46 elliptical galaxies 46 CMEs 46 latitudes 46 Saturn moon Enceladus 46 excitons 46 spawn tornadoes 46 Leonids 46 radioactive decay 46 olivine 45 temperature gradient 45 volcanic earthquakes 45 albedo 45 magnetization 45 cosmic radiation 45 celestial bodies 45 perigee 45 Today Mostly sunny 45 comets