![iNtegrated Space Weather Analysis System ( iSWA ) : iswa3 : Version 1.9.5 [Prepared Wormhole]](http://cdn.pearltrees.com/s/pic/sq/integrated-weather-analysis-14777851)
Eruption solaire inhabituelle : les communications brouillées ce mercredi ? Repérée par un observatoire spatial de la Nasa, une éruption solaire inhabituelle et spectaculaire risque de perturber les satellites et réseaux de communications terrestres ce mercredi. Si ce soir vous ne parvenez pas à passer correctement des appels depuis votre téléphone portable ou à trouver le bon itinéraire sur votre GPS, ce sera peut-être à cause du Soleil. En effet, une éruption solaire "spectaculaire", d'après la description du Centre de prévisions spatiales NWS, et d’une intensité assez rare est survenue hier matin à 7h41 (heure de Paris). Elle pourrait provoquer des perturbations dans l’activité des satellites (GPS notamment) et des communications. Selon un porte-parole de l’agence spatiale américaine, certains avions de ligne pourraient même se voir obligés de modifier leur itinéraire au-dessus des régions polaires ce soir. Avez-vous déjà partagé cet article? Partager sur Facebook Partager sur Twitter UV et rayons X : chaque éruption s'accompagne d'un intense rayonnement
Space Weather Warnings Currently in Effect NOAA / Space Weather Prediction Center Space Weather Alerts Alerts/Displays - Archive - Help Space Weather Alerts Timelines Alerts and Warnings Timeline Alerts issued in the past 7 days, ending with today.Warnings Currently in Effect (this page) 7 day plot centered on today showing past 3 days and next 3 days.Alerts Timeline Archives Timelines of Alerts issued since February 2002. A Table of SWPC Alerts and Warnings and Descriptions of SWPC Alerts with helpful user information are online.
More Signs Of The Sun Slowing Down In my post from yesterday, I highlighted a paragraph from a NASA press release which touched on one of the final findings of the soon to be ended Ulysses spacecraft mission to study the sun: “Ulysses ends its career after revealing that the magnetic field emanating from the sun’s poles is much weaker than previously observed. This could mean the upcoming solar maximum period will be less intense than in recent history. “ A few months ago, I had plotted the Average Geomagnetic Planetary Index (Ap) which is a measure of the solar magnetic field strength but also daily index determined from running averages of eight Ap index values. Click for a larger image I had noted that there was a curious step function in 2005, almost as if something had “switched off”. Today, since it is fathers day, and I get to do whatever I want, I chose to revisit this graph. First, I’ve updated the original Ap graph to June 2008 as you can see below. Now we have almost two years. Here is my plot of the above dataset:
SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids - Nightly forte tempête solaire Puissante éruption solaire dans la région active 1402. Le 23 janvier à 3h59 TU (temps universel), le satellite Solar Dynamics Observatory (SDO) a enregistré à la surface du Soleil, un puissant flash dans l’extrême ultraviolet. Précisément au-dessus de la région active 1402 où s’observe une tache solaire qui ne cesse de croitre depuis plusieurs jours. Les torsions de ses lignes de champs magnétique ont littéralement catapulté dans l’espace de grandes masses d’énergie. Les régions actives 1401 et 1402 furent déjà le théâtre d’une remarquable éruption solaire ou CME, le 19 janvier dernier. Toute cette activité observée à la surface de notre étoile n’a rien d’anormal. A découvrir sur le site Spaceweather : galerie photo des aurores polaires du 22-23 janvier. Suivez l’activité solaire sur le site SolarHam, véritable tableau de bord en quasi-temps réel qui reflète toutes les observations de notre étoile. Source : Spaceweather.
C2H2 - Simulations of Specific Events In order to get a better understanding of coronal mass ejection (CME) events that occur on the Sun, C2H2 researchers create numerical simulations to model real CMEs observed by satellites. Reproducing observed results through simulations helps explain and constrain the underlying physics, boundary conditions, and processes behind a CME’s creation and evolution. To illustrate how numerical simulations are carried out, we describe a case in which a series of CMEs was modeled by C2H2 researchers. X-class flare from AR 9236 Noe Lugaz et al. ( ApJ 659: 788-800) simulated multiple coronal mass ejection events that occurred in succession on November 24th, 2000 from NOAA active region 9236. For the study, Lugaz et al. chose three CMEs that happened close enough together to interact, but far enough apart in time from other CMEs so that they could be considered an independent system. To investigate the CME ejecta at the location of Earth, the model was propagated out to 1AU.
Strange emissions by sun are mutating matter ~UPDATED 12/01/11 Check links please…This is not a scientific paper…link at bottom for source…Thank you ~jude The angry sun For months mounting fear has driven researchers to wring their hands over the approaching solar storms. Some have predicted devastating solar tsunamis that could wipe away our advanced technology, others voiced dire warnings that violent explosions on the surface of the sun could reach out to Earth, breach our magnetic field, and expose billions to high intensity X-rays and other deadly forms of cancer-causing radiation. Now evidence has surfaced that something potentially more dangerous is happening deep within the hidden core of our life-giving star: never-before-seen particles—or some mysterious force—is being shot out from the sun and it’s hitting Earth. Whatever it is, the evidence suggests it’s affecting all matter. Strange and unknown Alarmed physicists first became aware of this threat over the past several years. Something impossible has happened. Sources
SOLARHAM.com / Solar Cycle 24 / Spaceweather / Amateur Radio VHF Aurora Website - Nightly La tempête solaire a touché la Terre L’énorme éruption solaire observée ce weekend a comme prévu atteint notre planète hier. Après de magnifiques aurores polaires, elle a généré quelques désagréments, mais pas de catastrophes. La prévision de la météo solaire a bien fonctionné. Avec les instruments installés dans l’espace sur les satellites SDO ( Solar Dynamic Observatory ) et Soho ( Solar Heliospheric Observatory ), les humeurs du Soleil sont aujourd’hui très suivies. Le 19 janvier, une forte éruption solaire avait produit une éjection de masse coronale ou CME (en anglais, Coronal Mass Ejection ), annonciatrice d’un regain d’activité solaire… et d’aurores polaires. L'observation de l'éruption solaire du 19 janvier 2012 par SDO dans différentes longueurs d'onde . Bombardement de protons sur la haute atmosphère Fusant à quelques milliers de kilomètres par seconde, ils étaient attendus sur Terre mardi 24. Ce sujet vous a intéressé ? Commenter cette actualité ou lire les commentaires
Coronal Topology and CMEs Coronal Topology and Coronal Mass Ejections Alan H. McAllister Helio Research Collaborators: A. Hundhausen and D. We present here work carried out over the last decade focused on understanding the large scale coronal evolution and signatures associated with coronal mass ejection (CME) generation. Coronal Streamers, Coronal Arcades and CMEs The Solar Maximum Mission (SMM) observations [Hundhausen, 1993] suggested that there was an association between the white light streamers which are the main source of CMEs (as seen in coronagraphs) and the dynamic coronal arcades seen in x-rays following at least some CMEs. After Yohkoh's Soft X-ray Telescope (SXT) started returning images in September 1992, it became apparent that most quiet sun CMEs had an associated dynamic soft x-ray arcade appearing after the eruption [McAllister et. al., 1992; Hanaoka et. al., 1994; Hiei, Hundhausen, and Sime, 1993; McAllister et. al., 1996]. Coronal Arcades, CMEs, and Switchbacks Coronal Hole Association. Notes