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Issued on 2024 Jul 30 0727 UTC
A shock was detected in the solar wind data (DSCOVR and ACE) around 23:20 UTC on July 29. The interplanetary magnetic field jumped from 4 nT to 14 nT, with the Bz component changing from -3 nT to 11 nT and then decreasing up to -12 nT. The solar wind speed jumped from 350 km/s to 440 km/s and increased up to 500 km/s. The solar wind density at the shock jumped from 1.84 ppcc to 7.25 ppcc and increased up to around 15 ppcc. The shock is probably related to an early interplanetary coronal mass ejection (ICME) arrival, associated with one of the CMEs detected between July 27-28. Geomagnetic conditions are currently at minor storm levels globally (NOAA Kp 5) and active levels locally (K BEL 4), but may increase further due to the expected arrival of additional CMEs detected on July 28. Further monitoring and analysis is ongoing.