"When you choose this path at 3rd level, as an action, you can open your awareness to the presence of concentrated magic. Until the end of your next turn, you know the location of any spell or magic item within 60 feet of you that isn’t behind total cover. When you sense a spell, you learn which school of magic it belongs to."

What makes me huh is "the location of any spell" part.

1. Does this mean it only detects spells that manifest in a specific location? This would include spells that have a manifestation like Minor Illusion or triggered manifestation like Magic Mouth or Glyph of Warding.

2. Or does it also detect the effects of a spell or magic effect? Would the barbarian know a person is under the influence of a charm, Nystul's Magic Aura, etc.?

3. Is this a one round duration equivalent of casting Detect Magic? Or something more?

I allowed #2 while DMing due to my ignorance and because it helped with the ominous tone of the scene.