Torino Scale Flashcards
Threatening Events (Orange Zone) A close encounter, with a significant threat of a collision capable of causing regional devastation.
5
Certain Collisions (Red Zone) A collision capable of causing a global climatic catastrophe. Such events occur once per 100,000 years, or less often.
10
Events having no likely consequences (white zone) Likelihood of collision is 0, or well below the chance that a random object of the same size will strike the Earth within the next few decades This designation also applies to any small object that is unlikely to reach the Earth’s surface intact
0
Events Meriting careful monitoring (Green Zone) The chance of collision is extremely unlikely, about the same as a random object of the same size striking the Earth within the next few decades.
1
Events meriting concern (Yellow Zone) A somewhat close, but not unusual encounter Collision is very unlikely
2
Certain Collisions (Red Zone) A collision capable of causing regional devastation. Such events occur between once per 1000 years and once per 100,000 years.
9
Threatening Events (Orange Zone) A close encounter, with an extremely significant threat of a collision capable of causing a global catastrophe.
7
Events meriting concern (Yellow Zone) A close encounter with a 1% or greater chance of a collision capable of causing localized destruction
3
Threatening Events (Orange Zone) A close encounter, with a significant threat of a collision capable of causing a global catastrophe.
6
Certain Collisions (Red Zone) A collision capable of causing localized destruction. Such events occur somewhere on Earth between once per 50 years and once per 1000 years.
8
Events meriting concern (Yellow Zone) A close encounter, with 1% or greater chance of a collision capable of causing regional devestation
4
