Upcoming Geomagnetic Storm on August 9-10, 2024

The Space Weather Prediction Centre (SWPC) of NOAA has issued a moderate geomagnetic storm alert for August 9 and 10. This is due to three different sunspot clusters (active regions AR 3774, AR 3781, and AR 3777) erupting with M-class solar flares on August 7. AR 3774 produced M1.8 and M4.5 flares, AR 3781 emitted an M1.1 flare, and AR 3777 unleashed an M5.0 flare—the strongest of the day.

Coronal Mass Ejections (CMEs)

These solar flares triggered multiple CMEs, energetic events that expel solar plasma into space. Scientists predict, based on modeling, that these CMEs will collide with Earth between August 9 and 10. When this solar material impacts Earth, it causes geomagnetic storms categorized from G1 (minor) to G5 (extreme). The upcoming storm is forecasted to be moderate (G2) but could still affect modern infrastructure and induce spectacular polar light displays.

Potential Effects

The geomagnetic storm can increase satellite drag, and lower altitudes, and generate currents in long conductors like power grids and oil pipelines, potentially disrupting communications and energy infrastructure. According to SWPC studies, geomagnetic activity on August 9, 2024, classified as a minor (K-index of 5) storm, can also lead to enhanced auroral displays at high latitudes and minor operational disturbances in satellites.

Health Impacts

Geomagnetic storms may affect sensitive individuals, especially those with preexisting health conditions. Possible physiological responses include fatigue, insomnia, migraines, increased stress, and anxiety, especially for those prone to cardiovascular issues. Monitoring health and engaging in stress-reducing activities during this period is advisable for impacted individuals.

Earlier, SSP wrote that moderate solar activity was expected in the next three days.