A rare solar event involving two back-to-back explosions on the Sun is expected to trigger a significant geomagnetic disturbance on Earth starting April 16, 2025. According to the U.S. National Oceanic and Atmospheric Administration (NOAA), this dual coronal mass ejection (CME) is directed toward our planet and could cause a strong G3-class geomagnetic storm.
The phenomenon, which includes two dense plasma ejections from the Sun’s atmosphere, is likely to reach Earth’s magnetosphere in the early hours of Tuesday. Experts anticipate temporary effects on satellite operations, navigation systems, and even visible auroras in regions far from the poles.
Space weather physicist Dr. Tamitha Skov noted via X (formerly Twitter) that the solar material is “slow-moving but dense,” which may amplify the impact of the geomagnetic response. “These solar storms will be noticeable,” she added.
The NOAA forecasts that the Kp index—a scale measuring geomagnetic activity—could rise to 6, which categorizes the event as a G3-level storm. While not extreme, such storms can influence both technology and human biology.
Potential Effects for Humans and Systems
Although geomagnetic storms primarily affect infrastructure like satellites, electrical grids, and radio communication, individuals sensitive to environmental changes—such as those with cardiovascular conditions or chronic fatigue—may also experience physical symptoms. These can include fatigue, headaches, changes in blood pressure, irritability, or difficulty concentrating.
Medical professionals advise people with weather sensitivity to avoid strenuous activity during geomagnetic peaks, stay hydrated, reduce screen time, and ensure proper sleep. Additional caution is recommended for those with known health vulnerabilities.
Technologically, temporary disruptions in GPS accuracy, shortwave radio communication, and minor voltage fluctuations in power systems may occur. The aviation sector may also monitor the event closely due to possible signal degradation at high altitudes.
Auroras and Regional Visibility
One of the visually striking effects of geomagnetic storms is auroral activity. This week, observers in higher-latitude regions of North America and Europe could be treated to vibrant northern lights. Areas in the northern U.S.—such as Minnesota, North Dakota, and parts of Washington—may offer visibility under clear skies.
NOAA suggests that optimal viewing will occur between 10 p.m. and 2 a.m. local time in dark, open spaces facing north. Smartphone users can enhance visibility using night mode with no flash.
Looking Forward
The current solar cycle is progressing toward its maximum, expected between late 2025 and. Scientists expect an uptick in space weather events like CMEs and solar flares over the coming months. NOAA continues to monitor the Sun for further activity and will issue updates as needed.
Though this particular storm is expected to subside after April 17, elevated geomagnetic conditions may linger through the week.
