![G1<\/a>– to](\"https:\/\/www.spaceweather.com\/glossary\/g1.jpg\"){kind=link}
![G2<\/a>-class (minor to moderate) storms are likely with a slight chance of escalating to category](\"https:\/\/www.spaceweather.com\/glossary\/g2.jpg\"){kind=link}
Exactly what time will the CME hit? This NASA model of the approaching cloud pinpoints the impact within a few hours around 0000 UT on July 23rd:<\/p>\n\n\n\n In the animation, Earth is marked by a yellow dot. Note that Mars, a red dot, also gets hit–a glancing blow on July 25th.<\/p>\n\n\n\n An independent\u00a0NOAA model of the CME<\/a>\u00a0predicts a slightly later arrival, with the densest part of the storm cloud reaching Earth around 0400 UT on July 23rd. Either way, NOAA or NASA, the timing favors sky watchers in western Europe and North America. In the most optimistic case of a\u00a0G3<\/a>-category storm, auroras could descend as far south as Illinois and Oregon (geomagnetic latitude 50 degrees) during the night of July 22-23.<\/p>\n\n\n\n :Product: Geophysical Alert Message wwv.txt Space weather for the past 24 hours has been minor. Space weather for the next 24 hours is predicted to be moderate. Space Weather Message Code: WARK04 EXTENDED WARNING: Geomagnetic K-index of 4 expected NOAA Space Weather Scale descriptions can be found at Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. SFI = 122 A index = 22 K index = 3 SSN = 124 GEOMAGNETIC STORM WARNING: Geomagnetic storms are possible on July 23rd when a full-halo CME is expected to hit Earth’s magnetic field. The storm cloud was hurled toward Earth yesterday Read more\u2026 <\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-4034","post","type-post","status-publish","format-standard","hentry","category-archive"],"_links":{"self":[{"href":"http:\/\/www.summersidearc.com\/index.php\/wp-json\/wp\/v2\/posts\/4034","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.summersidearc.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.summersidearc.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.summersidearc.com\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/www.summersidearc.com\/index.php\/wp-json\/wp\/v2\/comments?post=4034"}],"version-history":[{"count":1,"href":"http:\/\/www.summersidearc.com\/index.php\/wp-json\/wp\/v2\/posts\/4034\/revisions"}],"predecessor-version":[{"id":4035,"href":"http:\/\/www.summersidearc.com\/index.php\/wp-json\/wp\/v2\/posts\/4034\/revisions\/4035"}],"wp:attachment":[{"href":"http:\/\/www.summersidearc.com\/index.php\/wp-json\/wp\/v2\/media?parent=4034"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.summersidearc.com\/index.php\/wp-json\/wp\/v2\/categories?post=4034"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.summersidearc.com\/index.php\/wp-json\/wp\/v2\/tags?post=4034"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}![\"\"](\"https:\/\/www.spaceweather.com\/glossary\/g3.jpg\")
<\/figure>\n\n\n\nNOAA STI<\/h3>\n\n\n\n
:Issued: 2022 Jul 22 0605 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
#
# Geophysical Alert Message
#
Solar-terrestrial indices for 21 July follow.
Solar flux 122 and estimated planetary A-index 22.
The estimated planetary K-index at 0600 UTC on 22 July was 3.<\/p>\n\n\n\n
Geomagnetic storms reaching the G1 level occurred.<\/p>\n\n\n\n
Geomagnetic storms reaching the G2 level are likely.<\/p>\n\n\n\nNOAA Alerts<\/h3>\n\n\n\n
Serial Number: 4144
Issue Time: 2022 Jul 22 0506 UTC<\/p>\n\n\n\n
Extension to Serial Number: 4143
Valid From: 2022 Jul 21 1107 UTC
Now Valid Until: 2022 Jul 22 2359 UTC
Warning Condition: Persistence<\/p>\n\n\n\n
www.swpc.noaa.gov\/noaa-scales-explanation<\/p>\n\n\n\n
Induced Currents – Weak power grid fluctuations can occur.
Aurora – Aurora may be visible at high latitudes such as Canada and Alaska.<\/p>\n","protected":false},"excerpt":{"rendered":"