{"id":11151,"date":"2014-10-22T06:15:15","date_gmt":"2014-10-22T10:15:15","guid":{"rendered":"http:\/\/swling.com\/blog\/?p=11151"},"modified":"2014-10-22T11:33:45","modified_gmt":"2014-10-22T15:33:45","slug":"radio-blackout-x-ray-event-exceeds-x1","status":"publish","type":"post","link":"https:\/\/swling.com\/blog\/2014\/10\/radio-blackout-x-ray-event-exceeds-x1\/","title":{"rendered":"Radio blackout: X-Ray Event exceeds X1"},"content":{"rendered":"

\"latest_sxi\"<\/a><\/p>\n

I’ve heard from several of you this morning that the shortwave bands are dead.<\/p>\n

It’s not your radio…it’s our sun. We’re currently\u00a0experiencing an X-ray event exceeding X1 on the NOAA Space Weather Scale<\/a>. This equates to wide area blackout of HF radio communication and loss of radio contact for about an hour on sunlit side of Earth.<\/p>\n

SWLing Post<\/em> reader, Richard Langley, shares this space weather alert from NOAA:<\/p>\n

Space Weather Message Code:<\/strong> SUMX01
\nSerial Number:<\/strong> 105
\nIssue Time:<\/strong> 2014 Oct 22 1454 UTC<\/p>\n

SUMMARY:<\/strong> X-ray Event exceeded X1
\nBegin Time:<\/strong> 2014 Oct 22 1402 UTC
\nMaximum Time:<\/strong> 2014 Oct 22 1428 UTC
\nEnd Time:<\/strong> 2014 Oct 22 1450 UTC
\nX-ray Class:<\/strong> X1.6
\nOptical Class:<\/strong> 2b
\nLocation:<\/strong> S14E13
\nNOAA Scale:<\/strong> R3 – Strong<\/p>\n

NOAA Space Weather Scale descriptions can be found at
\nwww.swpc.noaa.gov\/NOAAscales<\/a><\/p>\n

Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.<\/p>\n

Radio – Wide area blackout of HF (high frequency) radio communication for about an hour.<\/p><\/blockquote>\n

Fear not, this shall eventually pass and SWLing will return to normal. Indeed, you might even catch a few rare band openings between event. I believe you can expect overall unsettled conditions near term, based on recent solar history.<\/p>\n","protected":false},"excerpt":{"rendered":"

I’ve heard from several of you this morning that the shortwave bands are dead. It’s not your radio…it’s our sun. We’re currently\u00a0experiencing an X-ray event exceeding X1 on the NOAA Space Weather Scale. This equates to wide area blackout of HF radio communication and loss of radio contact for about an hour on sunlit side […]<\/p>\n","protected":false},"author":15,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[3,43,810],"tags":[809,808,3344,427,946,4107],"class_list":["post-11151","post","type-post","status-publish","format-standard","hentry","category-news","category-shortwave-radio","category-space-weather","tag-cme","tag-coronal-mass-ejections","tag-hf-radio-blackout","tag-noaa","tag-solar-flare","tag-space-weather"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/pn3uc-2TR","jetpack-related-posts":[{"id":6805,"url":"https:\/\/swling.com\/blog\/2013\/06\/geomagnetic-storms-in-weekend-forecast\/","url_meta":{"origin":11151,"position":0},"title":"Geomagnetic storms in weekend forecast","author":"Thomas","date":"June 29, 2013","format":false,"excerpt":"Heads up! Geomagnetic storms may make it a challenge to hear the test broadcast of Hamburger Lokalradio this weekend or any shortwave broadcaster for that matter. Full details at Spaceweather.com and the ARRL (below): (Source: ARRL) Spaceweather.com\u00a0reports a strong geomagnetic storm is in progress as Earth passes through a region\u2026","rel":"","context":"In "News"","block_context":{"text":"News","link":"https:\/\/swling.com\/blog\/category\/news\/"},"img":{"alt_text":"(Source: SpaceWeather.com)","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2012\/01\/CMEm9-300x300.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":64390,"url":"https:\/\/swling.com\/blog\/2025\/10\/carlos-illustrated-radio-listening-report-and-recording-of-noaa-via-uscg-october-27-2025\/","url_meta":{"origin":11151,"position":1},"title":"Carlos\u2019 Illustrated Radio Listening Report and Recording of NOAA via USCG, October 27, 2025)","author":"Thomas","date":"October 28, 2025","format":false,"excerpt":"Many thanks to\u00a0SWLing Post\u00a0contributor and noted political cartoonist,\u00a0Carlos Latuff, who shares the following\u00a0illustrated radio listening report of a recent NOAA broadcast. 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The SWPC said the watch for September 7 remains in effect due to the arrival of a coronal mass ejection (CME) and the effects of\u2026","rel":"","context":"In "Ham Radio"","block_context":{"text":"Ham Radio","link":"https:\/\/swling.com\/blog\/category\/ham-radio\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2017\/09\/GeoStormForecast-e1504865980755.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2017\/09\/GeoStormForecast-e1504865980755.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2017\/09\/GeoStormForecast-e1504865980755.jpeg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2017\/09\/GeoStormForecast-e1504865980755.jpeg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":1525,"url":"https:\/\/swling.com\/blog\/2011\/08\/dont-expect-wwv-to-only-give-you-the-time-of-the-day\/","url_meta":{"origin":11151,"position":3},"title":"Don’t expect WWV to only give you the time of day","author":"Thomas","date":"August 16, 2011","format":false,"excerpt":"Last Monday, while taking a walk and listening to a Tecsun PL-380 in review, I tuned to WWV (10,000 kHz) at 10 minutes after the hour. 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