[ips-si-alert] WEAK SUDDEN IMPULSE DETECTED (15nT) IN MAGNETOMETER DATA 30 06 26 1151UT issued 1210 UT on 30 Jun 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

WEAK SUDDEN IMPULSE DETECTED (15nT) IN MAGNETOMETER DATA 30 06 26 1151UT
               Mean Magnetometer Parameters Pre/Post Impulse:
                                     Pre        Post       Pre/Post
Magnetometer Station          Unit   Impulse    Impulse    Change
Cocos_Island_(GA/BOM/ETH)      nT    277.5      290.3       12.8
Darwin_(GA)                    nT    160.6      174.1       13.5
Townsville_(GA)                nT   -628.9     -613.0       15.8
Townsville                     nT   -811.7     -796.0       15.7
Townsville_(ICSWSE/BOM)        nT    -55.3      -40.0       15.2
Learmonth_(GA)                 nT    343.6      363.1       19.5
Learmonth_(SWS)                nT   -958.9     -939.3       19.6
Canberra_(GA)                  nT   -176.3     -162.7       13.6
Hobart                         nT   -363.6     -352.3       11.3

Australian Space Weather Forecasting Centre
Bureau of Meteorology
ASWFC at bom.gov.au
www.bom.gov.au | www.sws.bom.gov.au