Video: A Perfect Solar Storm

Tag: 上海龙凤419MA

first_imgOn 23 July 2012, two eruptions on the sun known as coronal mass ejections (CMEs) burst from an active patch of sunspots on the far side of the sun, which is monitored by a probe that circles the sun ahead of Earth in the same orbit. Emerging about 15 minutes apart, the CMEs quickly merged into one shock wave of charged particles that washed over the probe’s sensors just 18.6 hours later (the “snowstorm” of particles seen late in this video), researchers report online today in Nature Communications. Behind the shock wave, charged particles raced along at about 2250 kilometers per second—five times their normal speed at Earth’s distance from the sun—and the magnetic field strength there was more than 10 times that normally seen at Earth’s orbit. If pointed in our direction, such a combination would have produced the strongest geomagnetic storm to have struck Earth in history and could have knocked out satellites and earthbound power grids, researchers say. Fortunately, the event was a bit of a fluke, as it erupted into a region of space where the solar wind and the magnetic field had been weakened by a solar flare 4 days earlier. The observations of these CMEs will help scientists better model space weather and predict potentially calamitous solar storms.(Video credit: Ying Liu)Sign up for our daily newsletterGet more great content like this delivered right to you!Country *AfghanistanAland IslandsAlbaniaAlgeriaAndorraAngolaAnguillaAntarcticaAntigua and BarbudaArgentinaArmeniaArubaAustraliaAustriaAzerbaijanBahamasBahrainBangladeshBarbadosBelarusBelgiumBelizeBeninBermudaBhutanBolivia, Plurinational State ofBonaire, Sint Eustatius and SabaBosnia and HerzegovinaBotswanaBouvet IslandBrazilBritish Indian Ocean TerritoryBrunei DarussalamBulgariaBurkina FasoBurundiCambodiaCameroonCanadaCape VerdeCayman IslandsCentral African RepublicChadChileChinaChristmas IslandCocos (Keeling) IslandsColombiaComorosCongoCongo, The Democratic Republic of theCook IslandsCosta RicaCote D’IvoireCroatiaCubaCuraçaoCyprusCzech RepublicDenmarkDjiboutiDominicaDominican RepublicEcuadorEgyptEl SalvadorEquatorial GuineaEritreaEstoniaEthiopiaFalkland Islands (Malvinas)Faroe IslandsFijiFinlandFranceFrench GuianaFrench PolynesiaFrench Southern TerritoriesGabonGambiaGeorgiaGermanyGhanaGibraltarGreeceGreenlandGrenadaGuadeloupeGuatemalaGuernseyGuineaGuinea-BissauGuyanaHaitiHeard Island and Mcdonald IslandsHoly See (Vatican City State)HondurasHong KongHungaryIcelandIndiaIndonesiaIran, Islamic Republic ofIraqIrelandIsle of ManIsraelItalyJamaicaJapanJerseyJordanKazakhstanKenyaKiribatiKorea, Democratic People’s Republic ofKorea, Republic ofKuwaitKyrgyzstanLao People’s Democratic RepublicLatviaLebanonLesothoLiberiaLibyan Arab JamahiriyaLiechtensteinLithuaniaLuxembourgMacaoMacedonia, The Former Yugoslav Republic ofMadagascarMalawiMalaysiaMaldivesMaliMaltaMartiniqueMauritaniaMauritiusMayotteMexicoMoldova, Republic ofMonacoMongoliaMontenegroMontserratMoroccoMozambiqueMyanmarNamibiaNauruNepalNetherlandsNew CaledoniaNew ZealandNicaraguaNigerNigeriaNiueNorfolk IslandNorwayOmanPakistanPalestinianPanamaPapua New GuineaParaguayPeruPhilippinesPitcairnPolandPortugalQatarReunionRomaniaRussian FederationRWANDASaint Barthélemy Saint Helena, Ascension and Tristan da CunhaSaint Kitts and NevisSaint LuciaSaint Martin (French part)Saint Pierre and MiquelonSaint Vincent and the GrenadinesSamoaSan MarinoSao Tome and PrincipeSaudi ArabiaSenegalSerbiaSeychellesSierra LeoneSingaporeSint Maarten (Dutch part)SlovakiaSloveniaSolomon IslandsSomaliaSouth AfricaSouth Georgia and the South Sandwich IslandsSouth SudanSpainSri LankaSudanSurinameSvalbard and Jan MayenSwazilandSwedenSwitzerlandSyrian Arab RepublicTaiwanTajikistanTanzania, United Republic ofThailandTimor-LesteTogoTokelauTongaTrinidad and TobagoTunisiaTurkeyTurkmenistanTurks and Caicos IslandsTuvaluUgandaUkraineUnited Arab EmiratesUnited KingdomUnited StatesUruguayUzbekistanVanuatuVenezuela, Bolivarian Republic ofVietnamVirgin Islands, BritishWallis and FutunaWestern SaharaYemenZambiaZimbabweI also wish to receive emails from AAAS/Science and Science advertisers, including information on products, services and special offers which may include but are not limited to news, careers information & upcoming events.Required fields are included by an asterisk(*)last_img read more


Tag: 上海龙凤419MA

first_imgCarson Palmer threw a 19-yard touchdown pass on 2nd-and-2 to Fitzgerald with 37 seconds left in overtime, and Arizona held off a now 0-4 San Francisco 49ers team, 18-15.Fitzgerald finished with four catches for 32 yards, giving the Cardinals the edge in a game dominated by the defense, and as a result, by the two kickers.Arizona’s Phil Dawson finished 4-for-4 on his field goal attempts as San Francisco’s Robbie Gould hit all four of his own attempts in regulation. Gould would knock in a field goal to put the 49ers ahead 15-12 with just more than two minutes left in overtime to cap a 17-play drive that lasted 7:36.But Palmer and the Cardinals went 75 yards on seven plays covering 1:52 to follow, setting up Fitzgerald’s leaping grab to seal the Arizona win. – / 40 #AZCardinals game winning drive in overtime and only touchdown of the game. Larry Fitzgerald🏈🖐🖑 TD #BeRedSeeRed #BirdGang #SFvsAZ #AZvsSF pic.twitter.com/qyHGoJPWzP— 🚨 Ronnie Laybold 🐾 (@YotesHereToStay) October 1, 2017In the complex game of football, overthinking happens.Sometimes, it’s just best to go with what’s worked. When the Arizona Cardinals so desperately needed a play for their offense that failed to produce anything other than four field goals through regulation and most of overtime, they called Larry Fitzgerald’s number. Grace expects Greinke trade to have emotional impact 29 Comments   Share   Derrick Hall satisfied with D-backs’ buying and selling The 5: Takeaways from the Coyotes’ introduction of Alex Meruelo Top Stories Former Cardinals kicker Phil Dawson retires Arizona Cardinals wide receiver Larry Fitzgerald (11) runs as San Francisco 49ers cornerback Dontae Johnson (36) and defensive back K’Waun Williams (24) defend during the first half of an NFL football game, Sunday, Oct. 1, 2017, in Glendale, Ariz. (AP Photo/Rick Scuteri)last_img read more