[ips-si-alert] WEAK SUDDEN IMPULSE DETECTED (18nT) IN MAGNETOMETER DATA 27 11 25 1200UT issued 1219 UT on 27 Nov 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

WEAK SUDDEN IMPULSE DETECTED (18nT) IN MAGNETOMETER DATA 27 11 25 1200UT
               Mean Magnetometer Parameters Pre/Post Impulse:
                                     Pre        Post       Pre/Post
Magnetometer Station          Unit   Impulse    Impulse    Change
Cocos_Island_(GA/BOM/ETH)      nT    189.4      201.8       12.4
Darwin_(GA)                    nT    110.7      127.5       16.8
Darwin                         nT      1.4       21.0       19.7
Townsville_(GA)                nT   -654.3     -636.5       17.8
Townsville                     nT   -747.7     -729.3       18.4
Townsville_(ICSWSE/BOM)        nT    -86.5      -68.6       17.9
Learmonth_(GA)                 nT    282.5      309.6       27.2
Learmonth_(SWS)                nT   -990.8     -963.8       27.0
Canberra_(GA)                  nT   -179.3     -164.1       15.3
Hobart                         nT   -420.2     -404.7       15.4

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