{"id":794727,"date":"2025-03-26T12:23:06","date_gmt":"2025-03-26T17:23:06","guid":{"rendered":"https:\/\/spaceweekly.com\/?p=794727"},"modified":"2025-03-26T12:23:06","modified_gmt":"2025-03-26T17:23:06","slug":"large-coronal-hole-facing-earth-g2-moderate-geomagnetic-storm","status":"publish","type":"post","link":"https:\/\/spaceweekly.com\/?p=794727","title":{"rendered":"Large coronal hole facing Earth, G2 – Moderate geomagnetic storm"},"content":{"rendered":"


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A G2 \u2013 Moderate geomagnetic storm is underway on March 26, influenced by a co-rotating interaction region (CIR) ahead of a high-speed stream (HSS) from a large coronal hole in the southern hemisphere.<\/p>\n

The arrival of CIR was felt since late March 25 but solar wind speeds remained below 500 km\/s until a sharp increase around 13:30 UTC today. Geomagnetic K-index of 6 (G2 \u2013 Moderate geomagnetic storm) threshold was reached at 13:58 UTC.<\/p>\n

Under G2 conditions, the area of impact is primarily poleward of 55 degrees Geomagnetic Latitude. Power grid fluctuations are a possibility, with high-latitude power systems potentially experiencing voltage alarms due to induced currents.<\/p>\n

In space, satellites may face orientation irregularities, and there is an increased likelihood of drag affecting low Earth-orbit satellites.<\/p>\n

HF (high frequency) radio propagation may experience fading at higher latitudes. Additionally, the aurora could be visible as far south as New York, Wisconsin, and Washington state, providing a rare visual treat for observers in these areas.<\/p>\n

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Image credit: SWPC<\/figcaption><\/figure>\n<\/div>\n
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Image credit: SWPC<\/figcaption><\/figure>\n<\/div>\n

Solar activity has intensified today, with an M1.0 solar flare from Region 4043 at 08:09 UTC. A Type II radio emission with estiamted velocity of 571 km\/s was detected at 09:20 UTC, likely associated with a coronal mass ejection (CME) from beyond the SW limb.<\/p>\n

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Sunpots on March 26, 2025. Credit: NASA SDO\/HMI<\/figcaption><\/figure>\n<\/div>\n