A shock was detected in the solar wind data around 16:42 UTC on May 10. The interplanetary magnetic field jumped from 4 nT to 44 nT, the solar wind speed jumped from 460 km/s to 700 km/s and the solar wind density at the shock increased from 5/cm3 to 30/cm3. The shock is related to an ICME arrival associated with one of the coronal mass ejections that was detected on May 08-09. Geomagnetic conditions have reached severe storm levels globally (NOAA Kp 8-) and major storm levels locally (K_Bel 7) starting at 15:00 UT on May 10.

A class M5.9 solar X-ray flare occurred on 2024/05/10 with peak time 14:11UT

A halo or partial-halo CME was detected with the following characteristics: t0 | dt0| pa | da | v | dv | minv| maxv| 2024-05-10T08:24:07.492 | 9.999722222222223 | 58 | 194 | 693 | 657 | 97 | 2016 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

The solar flaring activity was at high levels with several M-class flares and two X-class flares during the last 24 hours. The strongest reported flare was GOES X4.0 flare which peaked at 06:54 UTC on May 10, produced by NOAA Active Region (AR) 3664. During the flare, source region (AR 3664) of the flare had beta-gamma-delta configuration of its photospheric magnetic field. The solar flaring activity is expected to be at high to very high levels over the next 24 hours possibly with M-class flares and chance for X-class flare. A partial halo coronal mass ejection (CME) was observed on SOHO/LASCO-C2 images around 07:12 UTC on May 10. This CME is associated with a X4.0 flare, which peaked at 06:54 UTC, produced by NOAA AR 3664. Associated type II and type IV radio emissions were detected at 06:46 UTC and 06:51 UTC, respectively. This CME has a projected speed of about 694 km/s (as measured by the Cactus tool). The corresponding ICME is expected to impact the Earth on May 12. The greater than 10 MeV GOES proton flux started to increase around 11:00 UTC on May 09, associated with coronal mass ejections and flaring activities from NOAA AR 3664. It is increasing but still remains below the 10 pfu threshold level. In the next 24 hours, it may possibly cross the threshold level. The greater than 2 MeV electron flux, as measured by the GOES-16 satellite, was below the threshold level over the past 24 hours and is expected to remain so in the coming 24 hours. The 24h electron fluence is presently at normal level and is expected to remain so for the next 24 hours.

Geomagnetic conditions were globally and locally at quiet to unsettled conditions (NOAA Kp and K BEL 1 to 3). In the next 24 hours, moderate to severe storm conditions (K 6 to 8) are expected as multiple coronal mass ejections (CMEs) associated with flaring activity from NOAA AR 3664, observed on May 08-09, possibly impact Earth late on May 10 or May 11. Over the past 24 hours, interplanetary magnetic field was slightly disturbed. The North-South component (Bz) ranged between -6 and 4 nT. The interplanetary magnetic field ranged from 0 nT to 7 nT. The solar wind speed ranged from 450 km/s to 370 km/s. Enhanced solar wind parameters associated with interplanetary coronal mass ejections (ICME) arrival are expected as multiple CMEs associated with flaring activity from NOAA AR 3664, observed on May 08-09, possibly impact Earth late on May 10 or May 11.