The key to look at is the label on the templates: one is just 'radius' and the other is 'area when centred on the caster'.
pg.347 wrote:
All Areas spread out from the point of origin, which must be within range. Thus a spell with a range of Self (10’ radius) would originate from the caster. Unless otherwise noted, Spells centered on the caster do not affect the caster.
It looks possible to centre a 0' (10'r) spell NOT on the caster, but the other clause of area spells would be a problem, as most area spells cause damage.
Quote:
Some Spells affect Areas (Range listed as Arc, Radius or Cone). Unless the number of Targets is listed, the spell affects everything within its Range, regardless of concealment.
Tactically an option but the reduced number of squares and damaging yourself would make it rare to be done.