| massive explosion | 6 |
| gas explosion | 4 |
| dust explosion | 1 |
| nuclear explosion | 1 |
| second explosion | 1 |
| steam explosion | 1 |
| 5:30 am | 0.29 |
| produce ash plumes | 0.52 |
| injure two others | 0.51 |
| leave crater | 0.45 |
| kill two workers | 0.44 |
| cause extensive damage | 0.42 |
| produce plume | 0.42 |
| kill two people | 0.41 |
| kill one person | 0.41 |
| shatter window | 0.40 |
| create a shock wave | 0.40 |
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| damage | 0.53 |
| death | 0.46 |
| injury | 0.46 |
| fire | 0.42 |
| destruction | 0.41 |
| property damage | 0.35 |
| casualty | 0.35 |
| chaos | 0.35 |
| panic | 0.35 |
| personal injury | 0.31 |
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| a diameter of 260m | 0.38 |
| a depth of 30m. | 0.38 |
| terrorist connection | 0.32 |
| front of a building | 0.31 |
| short duration | 0.29 |
| limited impact | 0.27 |
| center | 0.27 |
| major impact | 0.25 |
| fuel | 0.21 |
| powerful | 0.56 |
| bigger | 0.50 |
| large | 0.49 |
| small | 0.45 |
| intentional | 0.45 |
| accidental | 0.43 |
| good | 0.43 |
| visible | 0.42 |
| big | 0.42 |
| preventable | 0.42 |
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| fire | 0.39 |
| thunderclap | 0.29 |
| catastrophic consequenc… | 0.21 |
| millions of gallons of … | 0.20 |
| several serious and min… | 0.16 |
| a pressure wave | 0.16 |
| flying debris | 0.16 |
| terrorist attack | 0.35 |
| attack | 0.30 |
| rapid increase | 0.25 |
| related | 0.56 |
| prevented | 0.53 |
| caused by bomb | 0.52 |
| caused | 0.51 |
| heard | 0.49 |
| caused by missile | 0.46 |
| produced by a chain rea… | 0.44 |
| triggered | 0.44 |
| expected | 0.40 |
| caused by a propane tank | 0.39 |
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