Speaker
Description
On 8 June 2024 at approximately 00:45 UT, a massive solar prominence erupted from Active Region 13697, located at approximately 18°S and 69°W on the solar disk, as seen from Earth's perspective. The eruption was accompanied by an M9.8-class solar flare and a full-halo coronal mass ejection (CME), which induced a noticeable deflection of pre-existing coronal streamer structures, as observed in visible-light coronagraphic imagers.
The CME acted as the primary driver of a coronal shock propagating into interplanetary space, evidenced by the detection of a complex type II radio burst recorded by both space-based and ground-based radio instruments.
The event was approximately Earth-directed and was accompanied by a significant enhancement in solar energetic particle (SEP) fluxes. This is evidenced by the prominent “snowstorm” effect observed in white-light coronagraph images, indicative of high-energy particle interactions with the instrument detectors. The SEP were accelerated by the CME-driven shock front, as confirmed by in situ particle measurements.
The magnetized front impacted Earth's magnetosphere on 10 June 2024; however, the interaction was weak and geoeffectively negligible, resulting in the non-occurrence of the initially forecasted G2-level geomagnetic storm (as measured by DSCOVR).
In this study, we analyzed the full sequence of the solar event—from its origin at the solar surface to its interaction with the near-Earth environment—by combining remote-sensing observations with in situ measurements. Additionally, we started the setup of a magnetohydrodynamic (MHD) simulations based on the RIMAP model to reconstruct the two-dimensional Parker spiral background of the ICME propagation. This modeling effort serves a dual purpose: (i) to identify the most probable region for solar energetic particle (SEP) acceleration, and (ii) to simulate the propagation and evolution of the CME-driven shock front up to Earth in order to assess the performance of the RIMAP (Reverse In situ data and MHD APproach) in comparison with other established models such as ENLIL and EUHFORIA.
