[gexla]

"Cool! What's G13 do?" - Bill Hicks

Looks like G5 is the highest level and the scale system is used by NOAA.

[ck2]

G13 could be a gamma-ray burst from a collapsing star less than 100 light years from earth

in which case, don't worry about it as we won't be around to worry about it further

astro-physics is AMAZING (until it kills you lol)

[serf]

>"Cool! What's G13 do?" - Bill Hicks

I hear that bit in my head every time a new plane or weapon designation is announced, glad to hear it stuck with others too.