The Basic Set (p. B247) has the following entry for a Fireball.
Lets the caster throw a ball of fire from his hand. This has 1/2D 25, Max 50, Acc 1. When it strikes something, it vanishes in a puff of flame. This spell is likely to ignite flammable targets.
Cost: Any amount up to your Magery level per second, for three seconds. The fireball does 1d burning damage per energy point.
Time to cast: 1 to 3 seconds.
Prerequisites: Magery 1, Create Fire, and Shape Fire.
I am trying to figure out what the range of this spell is?
I am new to GURPS, and have been only skimming the rules for a couple of days, so there is a chance I have just missed some obvious entry about this.