Expect Moderate Geomagnetic Storm Tonight: Know What It Means
The National Oceanic and Atmospheric Administration’s Space Weather Prediction Center has issued a G2 storm watch. The alert covers Wednesday at 8 p.m. ET through Thursday at 8 p.m. ET. Forecasters warn a coronal mass ejection will drive the event.
A coronal mass ejection is a large expulsion of solar plasma and magnetic field. It can send charged particles toward Earth. Those particles can spark auroras when they strike the upper atmosphere.
Why this matters
This moderate geomagnetic storm may push visible auroras farther south than usual. Night-sky observers in many U.S. states could see displays. The event follows recent strong solar activity.
Recent solar activity
NASA’s Solar Dynamics Observatory photographed an X5.8 solar flare. The flare peaked at 9:23 p.m. EDT on May 10, 2024. That activity helped produce the coronal mass ejection now en route.
Where auroras may appear
NOAA’s aurora viewline map shows many northern and central U.S. states within reach. Visibility depends on local conditions and storm intensity.
- Alaska
- Washington
- Oregon
- Idaho
- Montana
- Wyoming
- North Dakota
- South Dakota
- Nebraska
- Minnesota
- Iowa
- Wisconsin
- Illinois
- Michigan
- New York
- Vermont
- New Hampshire
- Maine
Potential impacts
A G2 storm can affect high-latitude power systems and spacecraft operations. High frequency radio propagation may degrade.
Weak power grids can experience fluctuations. Satellite operations may see minor impacts. Migratory animals could face navigation disruptions.
Studies and research
A 2023 study linked space weather disturbances to reduced bird migration. Researchers suggest disrupted magnetic cues affect navigation. NASA has also investigated links to marine mammal strandings.
Viewing advice and timing
The best viewing window is generally between 10 p.m. and 4 a.m. local time. Travel to the darkest site available for the best chance to see auroras.
March and the weeks around the spring equinox often show increased auroral activity. The sun’s 11-year cycle peaked around late 2024, producing stronger solar events.
Filmogaz.com recommends staying updated through NOAA and other official sources. If you want to know what it means for viewers and infrastructure, monitor official advisories. Expect a moderate geomagnetic storm tonight and plan accordingly.
