Can scrying be detected? Yes, the Scrying sensor can be sensed with Detect Magic
The spell creates an invisible sensor within 10ft of the target.
What is a spell in magic? An incantation, a spell, a charm, an enchantment or a bewitchery, is a magical formula intended to trigger a magical effect on a person or objects. The formula can be spoken, sung or chanted. An incantation can also be performed during ceremonial rituals or prayers.
How do you use spells in Pathfinder?
Can you counterspell a counterspell Pathfinder? No. You can’t counter Counterspell on your own turn by using your Reaction to cast Counterspell. You CAN use your reaction to cast Counterspell, but you will lose the original spell you were casting and the result would be the same. The only difference being that you wasted 2 spell slots instead of one.