WEAK SUDDEN IMPULSE DETECTED (16nT) IN IPS MAG DATA 23 09 01 0930UT Mean Mag Parameters Pre/Post Impulse: Pre Post Pre/Post Stn Unit Impulse Impulse Change dwn nT 65.5 78.7 13.2 hbt nT 79.0 95.4 16.4 cbr nT 24.1 42.6 18.5