seismometer.md

(Green‑zone draft)

Seismometer#

Seismometers measure ground motion using stable mechanical or electromechanical reference systems. Their behavior is coherent, predictable, and grounded in well‑characterized physical dynamics.

Dimensional Core (SET)#

• Spin: not relevant
• Elec: electronic sensing and signal processing
• Temp: minor influence on mechanical components

Why Green‑Zone#

Seismometers operate in a stable, substrate‑agnostic mechanical regime.
Their measurement principle is direct: relative motion between a mass and its housing. Calibration is robust, drift is well understood, and environmental effects are predictable.

Regime Notes#

• pos‑regime: low‑noise environments, steady ground conditions
• Q‑regime: moderate vibration, environmental noise
• neg‑regime: strong shocks, saturation, nonlinear motion

Alignment Notes#

Already aligned.
Clear operational limits (dynamic range, noise floor) help maintain coherence but require no conceptual adjustments.