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According to Hearne, the Dene people saw the resemblance between an aurora and the sparks produced when caribou fur is stroked. One observed in 1723 at Bologna was stated to be the first ever seen there. Space is part of Future US Inc, an international media group and leading digital publisher. "All of a sudden, the most spectacular lights and swirls and rays just filled the sky, dancing and darting here and there," Onsager told Space.com. Again, no guarantees, but here are some dark places close to the U.S.-Canada border to consider: Seeing them with your own eyes should be your primary mission. The quiescent solar wind reaches Earth with a velocity typically around 400 km/s, a density of around 5 ions/cm3 and a magnetic field intensity of around 2–5 nT (for comparison, Earth's surface field is typically 30,000–50,000 nT). Similarly, the Ngarrindjeri people of South Australia refer to auroras seen over Kangaroo Island as the campfires of spirits in the 'Land of the Dead'. If you've got clear skies, be sure to look for the Alpha Monocerotid meteor shower. The form of the aurora, occurring within bands around both polar regions, is also dependent on the amount of acceleration imparted to the precipitating particles. Thank you for signing up to Space. On 26 February 2008, THEMIS probes were able to determine, for the first time, the triggering event for the onset of magnetospheric substorms. [37][38] It is an aurora because it is caused by precipitation of electrons in the atmosphere but it appears outside the auroral oval,[39] closer to the equator than typical auroras. [42] Since then an extensive collection of measurements has been acquired painstakingly and with steadily improving resolution since the 1960s by many research teams using rockets and satellites to traverse the auroral zone. [86][87], The first ever extra-solar auroras were discovered in July 2015 over the brown dwarf star LSR J1835+3259. [3] Ancient Greek poets used the name metaphorically to refer to dawn, often mentioning its play of colours across the otherwise dark sky (e.g., "rosy-fingered dawn"). "Abisko has developed a reputation for being the No. The solar wind and magnetosphere consist of plasma (ionized gas), which conducts electricity. Shall I go ahead with business?" In northern latitudes, the effect is known as the aurora borealis or the northern lights. Tutti però concordano sul fatto che la NL venga dalla California o comunque dal nord-ovest degli Stati Uniti. In 2018, the company released footage from a spectacular all-sky aurora during a geomagnetic storm on March 14. Auroras are occasionally seen in latitudes below the auroral zone, when a geomagnetic storm temporarily enlarges the auroral oval. Reports are starting to come in from various places close to the U.S-Canada border that witnessed the Northern Lights on Saturday and in the early hours of Sunday. Related: The sun's wrath: Worst solar storms in history, The southern auroral ring lies above Antarctica and is very difficult for skywatchers, or anyone else, to get to. "[67] The second auroral event, which occurred on 2 September 1859 as a result of the exceptionally intense Carrington-Hodgson white light solar flare on 1 September 1859, produced auroras, so widespread and extraordinarily bright, that they were seen and reported in published scientific measurements, ship logs, and newspapers throughout the United States, Europe, Japan, and Australia. And you can have an aurora experience without even leaving your house if you so choose. You need darkness to see the northern lights, and places in the auroral zone have precious little of it during the summer months. Day-to-day positions of the auroral ovals are posted on the Internet.[9]. Other particles that do not mirror enter the atmosphere and contribute to the auroral display over a range of altitudes. To fully appreciate the glory and grandeur of this celestial display, which is also known as the aurora borealis, you have to settle beneath the ever-changing lights and watch them curve and curl, slither and flicker. These disturbances are sometimes strong enough to alter the trajectories of charged particles in both solar wind and magnetospheric plasma. The appearances of arcs, rays, curtains, and coronas are determined by the shapes of the luminous parts of the atmosphere and a viewer's position. There is also a mysterious, aurora-like brightening phenomenon in Earth's atmosphere called "Steve" that isn't attributable to aurora, although scientists aren't sure of its cause. Ti inviamo una e-mail con le istruzioni per creare una nuova password. maggiori informazioni Ho Capito. There are also plenty of options for good aurora viewing in North America. An aurora was detected on Mars, on 14 August 2004, by the SPICAM instrument aboard Mars Express.

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