Geomagnetic conditions reached moderate storm conditions (NOAA Kp 6-) observed between 18:00 and 21:00 UTC August 08. Local conditions (K bel) reached active levels at this time. This was due to the ongoing ICME passage from the CME which arrived on August 08. Bz was mostly negative between 16:00 UTC August 08 and 00:00 UTC August 09 with a minimum value of -17 nT. The magnetic field strength was stable around 17nT. The solar wind speed ranged between 330 and 380 km/s. Further periods of minor to moderate storm conditions may be m=possible over the next hours in response to any extended periods of negative Bz.

A halo or partial-halo CME was detected with the following characteristics: t0 | dt0| pa | da | v | dv | minv| maxv| 2026-08-04T13:48:22.434 | 6.0 | 201 | 360 | 1137 | 675 | 197 | 1953 t0: onset time, earliest indication of liftoff dt0: duration of liftoff (hours) pa: principal angle, counterclockwise from North (degrees) da: angular width of the CME (degrees), v: median velocity (km/s) dv: variation (1 sigma) of velocity over the width of the CME mindv: lowest velocity detected within the CME maxdv: highest velocity detected within the CME

Solar flaring activity was low over the past 24 hours, with only a C2 flare identified (SIDC flare 8345). It was produced by SIDC Sunspot Group (SG) 938 (NOAA Active Region [AR] 4505, Beta magnetic configuration) that currently rotates behind the limb. A yet-unnumbered SG/AR is rotating into view, but so far does not appear complex. As such, the change of a C-class flare in the next 24 hours is below 50%. No Earth-directed Coronal Mass Ejections (CME) were observed in the last 24 hours. SIDC Coronal Hole (CH) 174 is a northern, middle-latitude, elongated, irregular, positive polarity structure. It started crossing the solar central meridian in the last 24 hours, but due to its relatively small size and irregular shape, it is not likely to have a significant effect on Earth. The greater than 10 MeV proton flux, as measured by the GOES-19 satellite, was at nominal levels over the past 24 hours and is likely to remain so in the next 24 hours. The greater than 2 MeV electron flux, as measured by GOES 19, was below the 1000 pfu alert threshold for past 24 hours. It is expected to remain at the same levels in the next 24 hours. The electron fluence was at normal levels in the past 24 hours and it is expected to remain at the same levels in the next 24 hours.

The geomagnetic conditions of the past 24 hours were at quiet levels both globally and locally (NOAA Kp 0+ to 2- and K BEL 1 to 2) until the arrival of a glancing blow on 11 Aug at 10:34 UTC. However, the event had so far a very minor effect, as NOAA Kp remained at 2 and K BEL increased to 3. In the next 24 hours unsettled to active conditions are expected both locally and globally. The Solar Wind (SW) conditions of the past 24 hours featured a slow SW regime until the arrival of a glancing blow on 11 Aug at 10:34 UTC. Until this event, the SW speed dropped from 420 to 320 km/s, the interplanetary magnetic field (B) ranged between 4 and 6 nT, and its North-South component (Bz) varied from -3 to 5 nT. However, the glancing blow (associated with SIDC CME 705) increased the SW speed back to 420 km/s, the B to 10 nT, and the Bz dropped as low as -7 nT. The current disturbance is expected to last less than 24 hours and its intensity is estimated to remain roughly at the present levels.