Related by context. Frequent words. (Click for all words.) 60 megatons 52 joules 52 megaton 51 kiloton 49 curies 49 terabecquerels 48 terawatts 48 kilotons 47 Tangshan earthquake 47 electron volts 47 kiloton nuclear 47 Gamma rays 46 Great Kanto Earthquake 46 gigatons 46 meteoroid 46 supernova explosion 45 quakes measuring 44 meteor 44 Tunguska 44 observable universe 44 Chernobyl catastrophe 43 Eta Carinae 43 costliest hurricane 43 Antarctic ozone 43 gigajoules 43 atomic nucleus 43 kilotonnes 43 sextillion 43 Insured losses 42 magnetar 42 Kelud 42 cluster bomblets 42 GeV 42 detonations 42 visible wavelengths 42 gamma ray burst 42 coronal mass ejection 42 tremor measuring 42 supernova explosions 42 suns 42 magnitude earthquake 42 cu meters 42 solar flares 41 greenhouse gases GHGs 41 costliest natural 41 coronal mass ejections 41 quake jolted 41 meteoroids 41 Gamma ray bursts 41 gigatonnes 41 exabytes 41 incendiaries 41 comet nucleus 41 pyroclastic flow 41 magnitude quake 41 exabyte 41 substorms 41 geomagnetic storm 41 volcanic tremors 41 Typhoon Saomai 40 Catastrophe losses 40 cu ft gas 40 terabits 40 supernova 40 earthquakes 40 fireball 40 Cascadia Subduction Zone 40 worst peacetime maritime 40 gigaflops 40 Richter scale 40 Btus 40 solar nebula 40 americium 40 Northridge quake 40 reinstatement premiums 40 Loma Prieta quake 39 explosions 39 atomic particles 39 Forecasts ranged 39 gamma rays 39 Dai ichi nuclear 39 smoke plumes 39 cosmic ray 39 undersea earthquake 39 galaxy clusters 39 undersea quake 39 magnitude 39 megatonnes 39 infernos 39 cosmic rays 39 MeV 39 meteorite 39 kelvin 39 neutron star 39 TFLOPS 39 asteroid 39 vaporise 39 GFLOPS 39 Crab Nebula 38 atom smasher 38 Teraflops