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Failed to connect to MySQL: (1203) User howardkn already has more than 'max_user_connections' active connectionsPath: ...!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail From: Ulrich Onken Newsgroups: fr.rec.radio Subject: Re: Disparition de l'AM anglaise Date: Fri, 1 Nov 2024 04:08:48 +0100 Lines: 10 Message-ID: References: <671df7ba$0$28493$426a34cc@news.free.fr> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Trace: individual.net NiMn9ga2RCDFs2fQurfVfwJhcvocT88gpp8tD3rO+QNLc3hJzx Cancel-Lock: sha1:+aK5rVNUozTdQ5oqJiw+nT9fXD8= sha256:gPcr+SpGVOqQVeMa9enzZRWkvx2/25CtK1twax/w0xM= User-Agent: Mozilla Thunderbird Content-Language: en-GB, de-CH, de-DE In-Reply-To: Bytes: 1353 On 31.10.2024 15:57, Ulrich Onken wrote: > Je propose cette explication: Il y a eu une forte éruption solaire avec > beaucoup de rayons X le 26/10/2024 vers 0700 UTC (vers 09h00 en France), > voir https://www.spaceweather.gov/, sur "GOES X-RAY FLUX". Les rayons > provoquent une ionisationn plus forte de la couche D de l'ionosphère, > qui absorbe les ondes moyennes (et courtes). En anglais le phénomène est connu sous le nom "short-wave fadeout" (SWF): https://www.sws.bom.gov.au/Educational/1/3/5 .