Tremorsense

You become aware of vibrations in the ground around you. You gain tremorsense as an imprecise sense with a range of 30 feet. As normal for tremorsense, you can detect a creature only if it's on the same surface as you and only if the subject is moving along (or burrowing through) the surface.

Spell Effect: Tremorsense

Heightened (3rd) The spell's duration is 1 hour.

Heightened (5th) The spell's duration is 8 hours.