{"id":796621,"date":"2025-06-13T04:36:05","date_gmt":"2025-06-13T09:36:05","guid":{"rendered":"https:\/\/spaceweekly.com\/?p=796621"},"modified":"2025-06-13T04:36:05","modified_gmt":"2025-06-13T09:36:05","slug":"ch-hss-sparks-g2-moderate-geomagnetic-storm-3","status":"publish","type":"post","link":"https:\/\/spaceweekly.com\/?p=796621","title":{"rendered":"CH HSS sparks G2 – Moderate geomagnetic storm"},"content":{"rendered":"


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Waning effects of a negative polarity coronal hole high-speed stream (CH HSS), coupled with possible transient effects, have caused elevated geomagnetic activity on our planet on June 13.<\/p>\n

A G1 \u2013 Minor geomagnetic storm threshold at 20:34 UTC on June 12, followed by G2 \u2013 Moderate at 00:29 UTC on June 13.<\/p>\n

The primary area of impact under G2 \u2013 Moderate geomagnetic storms is primarily poleward of 55 degrees geomagnetic latitude. Power grid fluctuations may occur, with high-latitude power systems potentially experiencing voltage alarms. Satellite operators may observe orientation irregularities or increased drag on low Earth orbit satellites.<\/p>\n

High-frequency (HF) radio propagation could experience fading at higher latitudes, while auroras may become visible as far south as New York, Wisconsin, and Washington state.<\/p>\n

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Image credit: NASA SDO\/AIA, The Watchers<\/figcaption><\/figure>\n<\/div>\n

A return to nominal conditions is expected late on June 13. By June 14, positive polarity CH HSS influences are expected to begin, with a chance for a weak, glancing blow coronal mass ejection (CME) that left the Sun on June 8. Elevated conditions are likely to linger into June 15, according to the Space Weather Prediction Center (SWPC).<\/p>\n

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\"rtsw\"rtsw<\/figure>\n<\/div>\n

G2 \u2013 Moderate geomagnetic storming is likely on June 14, with a slight chance for G3 \u2013 Strong levels, due to positive polarity CH HSS influence mixed with possible transient effects from the June 8 CME. By June 15, conditions are anticipated to diminish as CH\/CME effects weaken.<\/p>\n

Solar activity was at low levels over the past 24 hours, with C-class flares and no Earth-directed CMEs. There is a chance for isolated M-class flares through June 15, primarily due to flare potential from Regions 4105, 4107, and 4115.<\/p>\n

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Sunspots on June 13, 2025. Credit: NASA SDO\/HMI<\/figcaption><\/figure>\n<\/div>\n


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Waning effects of a negative polarity coronal hole high-speed stream (CH HSS), coupled with possible transient effects, have caused elevated geomagnetic activity on our planet on June 13. A G1… <\/p>\n","protected":false},"author":1,"featured_media":796622,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[32],"tags":[],"class_list":["post-796621","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-space-weather-reports"],"_links":{"self":[{"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/posts\/796621","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=796621"}],"version-history":[{"count":0,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/posts\/796621\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/media\/796622"}],"wp:attachment":[{"href":"https:\/\/spaceweekly.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=796621"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=796621"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=796621"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}