{"id":38457,"date":"2019-07-11T07:41:36","date_gmt":"2019-07-11T11:41:36","guid":{"rendered":"https:\/\/swling.com\/blog\/?p=38457"},"modified":"2019-07-11T07:41:36","modified_gmt":"2019-07-11T11:41:36","slug":"arrl-reports-california-earthquakes-disrupted-west-coast-hf-propagation","status":"publish","type":"post","link":"https:\/\/swling.com\/blog\/2019\/07\/arrl-reports-california-earthquakes-disrupted-west-coast-hf-propagation\/","title":{"rendered":"ARRL reports California earthquakes disrupted west coast HF propagation"},"content":{"rendered":"

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

(Source: Southgate ARC<\/a>)<\/p>\n

The ARRL reports earthquakes in California disrupted HF propagation on the west coast<\/p>\n

British Columbia radio amateur\u00a0Alex Schwarz, VE7DXW<\/strong>, said that an Independence Day magnitude 6.4 earthquake in California\u2019s Mojave Desert and multiple aftershocks negatively affected HF propagation on the US west coast.<\/p>\n

Schwarz, who maintains the \u201cRF Seismograph\u201d and has drawn a correlation between earthquake activity and HF band conditions, said the radio disruption began at around 1600 UTC on July 4, and continued into July 5. He said that on July 4, the blackout was total except for 20 meters, where conditions were \u201cseverely attenuated,\u201d Schwarz said. The RF Seismograph also detected the magnitude 7.1 earthquake on July 6 in the same vicinity, Schwarz reported. The distance between the monitoring station in Vancouver, British Columbia, and that quake\u2019s epicenter is 1,240 miles.<\/p>\n

\u201cThings are back to normal after the strong quake, as far as the ionosphere is concerned, but the unrest has not stopped yet,\u201d Schwarz told ARRL on July 8.<\/p>\n

Read the full ARRL report at
\nhttp:\/\/www.arrl.org\/news\/view\/report-california-earthquakes-disrupted-hf-propagation-on-west-coast<\/a><\/p><\/blockquote>\n","protected":false},"excerpt":{"rendered":"

(Source: Southgate ARC) The ARRL reports earthquakes in California disrupted HF propagation on the west coast British Columbia radio amateur\u00a0Alex Schwarz, VE7DXW, said that an Independence Day magnitude 6.4 earthquake in California\u2019s Mojave Desert and multiple aftershocks negatively affected HF propagation on the US west coast. Schwarz, who maintains the \u201cRF Seismograph\u201d and has drawn […]<\/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":[545,3,43],"tags":[2011,7884,412,580],"class_list":["post-38457","post","type-post","status-publish","format-standard","hentry","category-ham-radio","category-news","category-shortwave-radio","tag-arrl","tag-earthquakes","tag-propagation","tag-southgate-arc"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/pn3uc-a0h","jetpack-related-posts":[{"id":20530,"url":"https:\/\/swling.com\/blog\/2016\/08\/usaf-wants-to-release-ionized-gas-in-the-upper-atmosphere-to-improve-hf\/","url_meta":{"origin":38457,"position":0},"title":"USAF wants to release ionized gas in the upper atmosphere to improve HF","author":"Thomas","date":"August 11, 2016","format":false,"excerpt":"(Source: Southgate ARC) New Scientist magazine reports the US Air Force is working on plans to improve HF radio propagation by releasing ionised gas in the upper atmosphere using a fleet of micro satellites As well as increasing the range of radio signals, the USAF says it wants to smooth\u2026","rel":"","context":"In "News"","block_context":{"text":"News","link":"https:\/\/swling.com\/blog\/category\/news\/"},"img":{"alt_text":"Earth","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2014\/09\/Earth.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2014\/09\/Earth.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2014\/09\/Earth.jpg?resize=525%2C300 1.5x"},"classes":[]},{"id":31264,"url":"https:\/\/swling.com\/blog\/2018\/03\/the-hf-voyager-make-contact-with-an-autonomous-ocean-going-drone\/","url_meta":{"origin":38457,"position":1},"title":"The HF Voyager: Make contact with an “autonomous ocean-going drone”","author":"Thomas","date":"March 19, 2018","format":false,"excerpt":"(Source: Southgate ARC) David, AA6YQ, author of DXLab - 'Better DXing Through (Free) Software', posted the following: 'Jupiter Research Foundation Amateur Radio Club (JRFARC) has integrated an HF transceiver with an autonomous ocean-going drone. Our mission is to deploy a ham radio station that roams the world's oceans while providing\u2026","rel":"","context":"In "Digital Modes"","block_context":{"text":"Digital Modes","link":"https:\/\/swling.com\/blog\/category\/digital-modes\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/03\/2014_09_03HAMRecoverPurple_Metis_016-HF-Voyager-1024x573.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/03\/2014_09_03HAMRecoverPurple_Metis_016-HF-Voyager-1024x573.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/03\/2014_09_03HAMRecoverPurple_Metis_016-HF-Voyager-1024x573.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":28182,"url":"https:\/\/swling.com\/blog\/2017\/09\/hf-radio-blackouts-in-wake-of-solar-flares\/","url_meta":{"origin":38457,"position":2},"title":"HF Radio blackouts in wake of solar flares","author":"Thomas","date":"September 8, 2017","format":false,"excerpt":"(Source: ARRL via Mike Terry) NOAA\u2019s Space Weather Prediction Center (SWPC) has issued a strong (G3) geomagnetic storm watch for September 7 through September 9. 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":50989,"url":"https:\/\/swling.com\/blog\/2021\/11\/radio-waves-cassettes-role-in-creation-of-internet-au2jcb-special-event-joel-hallas-w1zr-sk-and-shortwave-chatter\/","url_meta":{"origin":38457,"position":3},"title":"Radio Waves: Cassette’s Role in Creation of Internet, AU2JCB Special Event, Joel Hallas (W1ZR) SK, and Shortwave Chatter","author":"Thomas","date":"November 30, 2021","format":false,"excerpt":"Radio Waves:\u00a0 Stories Making Waves in the World of Radio Because I keep my ear to the waves, as well as receive many tips from others who do the same, I find myself privy to radio-related stories that might interest\u00a0SWLing Post\u00a0readers.\u00a0 To that end:\u00a0Welcome to the\u00a0SWLing Post\u2019s Radio Waves, a\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\/07\/JRC-NRD-93-Dial.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/JRC-NRD-93-Dial.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/JRC-NRD-93-Dial.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/JRC-NRD-93-Dial.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/JRC-NRD-93-Dial.jpg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":46729,"url":"https:\/\/swling.com\/blog\/2020\/12\/radio-waves-ajit-pai-to-resign-hams-need-to-embrace-hacker-community-coast-guard-might-abandon-hf-voice-watchkeeping-and-fcc-action-against-unauthorized-transceivers\/","url_meta":{"origin":38457,"position":4},"title":"Radio Waves: Ajit Pai to Resign, Hams Need to Embrace Hacker Community, Coast Guard Might Abandon HF Voice Watchkeeping, and FCC Action Against Unauthorized Transceivers","author":"Thomas","date":"December 1, 2020","format":false,"excerpt":"Radio Waves:\u00a0 Stories Making Waves in the World of Radio Because I keep my ear to the waves, as well as receive many tips from others who do the same, I find myself privy to radio-related stories that might interest\u00a0SWLing Post\u00a0readers.\u00a0 To that end:\u00a0Welcome to the\u00a0SWLing Post\u2019s Radio Waves, a\u2026","rel":"","context":"In "AM"","block_context":{"text":"AM","link":"https:\/\/swling.com\/blog\/category\/am\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/Kenwood-R-1000-Encoder-Dial-2.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/Kenwood-R-1000-Encoder-Dial-2.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/Kenwood-R-1000-Encoder-Dial-2.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/Kenwood-R-1000-Encoder-Dial-2.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/Kenwood-R-1000-Encoder-Dial-2.jpg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":16381,"url":"https:\/\/swling.com\/blog\/2015\/12\/p53z9dx-successful-ham-radio-activation-of-north-korea\/","url_meta":{"origin":38457,"position":5},"title":"P5\/3Z9DX: Successful ham radio activation of North Korea","author":"Thomas","date":"December 22, 2015","format":false,"excerpt":"(Source: Southgate ARC) Ham radio activation of North Korea The ARRL reports the first amateur radio operation from Pyongyang, N.Korea in 13 years took place on December 20. In an unexpected turn of events, Polish DXer Dom Gryzb, 3Z9DX, who has been visiting North Korea this week in advance of\u2026","rel":"","context":"In "Current Events"","block_context":{"text":"Current Events","link":"https:\/\/swling.com\/blog\/category\/current-events\/"},"img":{"alt_text":"NorthKoreaMap","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2011\/12\/NorthKoreaMap.gif?resize=350%2C200","width":350,"height":200},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/38457","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/users\/15"}],"replies":[{"embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/comments?post=38457"}],"version-history":[{"count":0,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/38457\/revisions"}],"wp:attachment":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/media?parent=38457"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/categories?post=38457"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/tags?post=38457"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}