I have a Mage: the Ascension 20th Anniversary Edition game running and one of the players played a game of Mage the Ascension Second Edition before that with a different Storyteller.
In that chronicle they used the prime sphere as a universal detection spell for the use of magick (however that player is unsure if that was just a houserule).
The rulebook of M20 states inside the description of what you can do with the first dot of the Prime Sphere on page 520 (highlights added by the asker):
She may spot energetic ebbs and flows, can sense and at least try to read Resonance and Synergy signatures, and could also absorb Quintessence into her personal Pattern.
One wiki states for a 1 dot rote of the prime sphere:
Etheric Senses: The mage can perceive Quintessential energy, and is alerted when someone uses magic in their vicinity. source
They state Mage: The Ascension Revised Edition Pg. 179-180 as the source for this rote together with page 520 in the M20 core rulebook.
Is that a correct application of rules as written in Mage the Ascension Second Edition and would the rules of Mage: the Ascension 20th Anniversary Edition allow for a similar reading?