WEAK SUDDEN IMPULSE DETECTED (25nT) IN IPS MAG DATA 29 09 01 0939UT Mean Mag Parameters Pre/Post Impulse: Pre Post Pre/Post Stn Unit Impulse Impulse Change dwn nT 23.1 45.0 21.9 hbt nT 68.0 92.6 24.6 cbr nT -5.1 24.7 29.8