[ips-si-alert] WEAK SUDDEN IMPULSE DETECTED (8nT) IN MAGNETOMETER DATA 19 08 26 0421UT issued 0440 UT on 19 Aug 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

WEAK SUDDEN IMPULSE DETECTED (8nT) IN MAGNETOMETER DATA 19 08 26 0421UT
               Mean Magnetometer Parameters Pre/Post Impulse:
                                     Pre        Post       Pre/Post
Magnetometer Station          Unit   Impulse    Impulse    Change
Cocos_Island_(GA/BOM/ETH)      nT    294.6      302.3        7.7
Darwin_(GA)                    nT    174.3      181.7        7.3
Darwin                         nT     91.2       99.7        8.5
Townsville_(GA)                nT   -655.5     -648.5        7.0
Townsville                     nT   -842.5     -835.9        6.6
Townsville_(ICSWSE/BOM)        nT    -63.6      -56.5        7.1
Learmonth_(GA)                 nT    338.4      347.5        9.1
Learmonth_(SWS)                nT   -966.2     -956.9        9.3
Canberra_(GA)                  nT   -213.7     -206.0        7.7
Hobart                         nT   -394.2     -383.2       11.1

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