Explode

Explosives have the explode special property, which lists the amount of damage the explosion deals, the damage type, special effects (with a duration, if necessary), and the radius of the explosion. When you attack with this type of weapon or ammunition, aim at a grid intersection. Each creature within the blast radius takes the listed damage but can attempt a Reflex saving throw for half damage. If you score a critical hit, it applies only to the creature closest to the targeted intersection (you choose the creature if several are equally close). If the explode special property has any special effects other than damage, they are negated with a successful saving throw. Some exploding weapons, such as smoke grenades, don’t deal damage, so they don’t include the damage and damage type entries.