A geomagnetic storm is a large-scale disturbance of Earth’s magnetosphere caused by enhanced coupling between the solar wind and the geomagnetic field, typically following coronal mass ejections or high-speed solar wind streams from coronal holes. It is characterized by intensified magnetospheric convection, ring current enhancement, and reconfiguration of current systems such as the auroral electrojets. Storm development and recovery phases are quantified by indices like Dst and Kp, reflecting global magnetic field perturbations. Geomagnetic storms drive strong ionospheric currents, modify radiation belt populations, enhance auroral activity, and can induce geomagnetically induced currents in conductive technological infrastructures.
Just last month, a powerful solar storm lit up skies across the northern hemisphere, producing vivid auroras visible as far south as parts of the northern United States.
Planetary Sciences
Jul 2, 2025
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An unexpectedly strong solar storm rocked our planet on April 23, 2023, sparking auroras as far south as southern Texas in the U.S. and taking the world by surprise.
Planetary Sciences
Jul 1, 2025
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Northern lights may be visible in parts of the U.S. Monday night following weekend solar storms.
Planetary Sciences
Jun 2, 2025
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Solar storms have the potential to cause catastrophic damage. One that occurred around the end of October 2003 (now called the 2003 Halloween Storm) caused an estimated $27B in damages. That number will only increase as humanity ...
Planetary Sciences
Jun 2, 2025
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Some 13,000 years ago, the sun emitted a huge belch of radiation that bombarded Earth and left its imprint in ancient tree rings. That solar storm was the most powerful one ever recorded. The next strongest was the 1859 Carrington ...
Planetary Sciences
May 22, 2025
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In a paper published in Geophysical Research Letters, researchers from Kyushu University report on the activity of sporadic E layers—about 90–120 km above sea level—during the 2024 Mother's Day geomagnetic storm. The team ...
Planetary Sciences
May 13, 2025
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One year ago today, representatives from NASA and about 30 other U.S. government agencies gathered for a special meeting to simulate and address a threat looming in space. The threat was not an asteroid or aliens, but our ...
Planetary Sciences
May 10, 2025
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A strong solar storm headed to Earth could produce colorful aurora displays across more U.S. states than usual Tuesday night.
Planetary Sciences
Apr 15, 2025
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The sun periodically ejects huge bubbles of plasma from its surface that contain an intense magnetic field. These events are called coronal mass ejections, or CMEs. When two of these ejections collide, they can generate powerful ...
Astronomy
Feb 24, 2025
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The largest solar storm in two decades hit Earth in May 2024. For several days, wave after wave of high-energy charged particles from the sun rocked the planet. Brilliant auroras engulfed the skies, and some GPS communications ...
Planetary Sciences
Feb 6, 2025
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