G Locrian ♮2 ♭4 Scale
G Locrian ♮2 ♭4 contains 7 notes: G, A, B♭, C♭, D♭, E♭, F. It has 4 flats: B♭, C♭, D♭, E♭. The step pattern is W–H–H–W–W–W–W.
A dark Locrian variant with a diminished 4th that creates unusual interval compression in the lower part of the scale. Primarily theoretical, but the hidden major-minor ambiguity can be exploited by skilled composers.
The formula is 1, 2, b3, b4, b5, b6, b7. The b4 is enharmonically a major 3rd, so the clash between b3 and b4 creates a hidden major-minor duality. This interval compression in the lower portion of the scale is its most distinctive feature.
Use it for brief chromatic passages where you need extreme tension that resolves quickly. The tight interval cluster between b3 and b4 sits on adjacent frets and can work as a rapid ornament before resolving to a more stable mode.