{
  "problem_id": "EARTH1",
  "critical_hopf_stiffness_GPa_m": 6.0435,
  "marginal_hopf_period_days": 5.0707,
  "first_trough_friction_anomaly": -0.005255,
  "first_rebound_peak_time_hr": 85.5048,
  "first_rebound_peak_normalized_velocity": 1.58969
}