  Gravitational wave detectors, such as KAGRA, require complex mirror
suspension systems to reach high sensitivity. One particular concern in these
suspensions is the presence of crackling noise, where motion of the steel
crystal structure disturbs material defects, causing impulse force release and
exciting mirror motion. Crackling in the Geometric Anti Spring filters (GAS) in
KAGRA's suspension system could introduce noise in the gravitational wave
detection band. We investigate crackling noise in a miniature GAS with a
low-frequency cyclical stress. We developed a scaling law between miniature and
KAGRA GAS. Applying experimental results to the scaling law allows us to
estimate the upper limit of crackling noise in KAGRA. It is found that
crackling noise should be below the target sensitivity for gravitational waves
above 60 Hz.
