Torino scale the validity and societal impact of SETI data. The Torino Scale also uses a color code scale: white, green, yellow, orange, red. Each color code has an overall meaning: No object has ever been rated above level 4. The Chicxulub impact, believed by most scientists to be a significant factor in the extinction of the dinosaurs, has been estimated at 100 million (10) megatons, or Torino Scale 10. The impacts which created the Barringer Crater and the Tunguska event in 1908 are both estimated to be in the 3–10 megaton range, corresponding to Torino Scale 8. The 2013 Chelyabinsk meteor
Judo in Canada syllabus calls "6th+ "kyū""). The first five "dan" grades ("shodan" to "godan") are represented by a black belt. Judoka ranked sixth to eighth "dan" may wear a red and white belt, and those ranked ninth or tenth "dan" may wear a solid red belt, but this is not required and the black belt remains the standard for all "dan" grades. In the past women's belts would include a white stripe in the centre of the length of the belt to differentiate them from men, but this is much less common now. Promotions are regulated by Judo Canada using guidelines set