Chaleur extrême Valable du: 26-06-2019 07:59 Au: 27-06-2019 23:59 Avertissement pour: Chaleur extrême Niveau: Orange info button
nederlands:
Het wordt zeer warm de komende dagen. Bij dergelijke erg hoge temperatuurwaarden zullen bepaalde te nemen maatregelen voor behoeftige mensen noodzakelijk zijn : regelmatig drinken, zich lichter kleden, de dag in koelere ruimten laten doorbrengen, de gezondheidstoestand regelmatig opvolgen, licht verteerbaar voedsel ( en in kleinere porties) tot zich nemen, deuren en ramen gesloten houden om de warmte buiten te houden. Wees voorbereid en volg de raadgevingen van de bevoegde overheid op.

français:
Il fera chaud durant les prochains jours. Dans de telles circonstances de temperatures elevees, les regles suivantes minimales sont d?application : boire regulierement, se vetir legerement, passer ses journees dans des endroits frais, se conformer aux regles habituelles de sante, fractionner les portions alimentaires, eviter la chaleur exterieure en fermant portes et fenetres. Soyez pre?ts et suivez les conseils donne?s par les autorite?s compe?tentes. 

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eit 171 eit 195 eit 284 eit 304
 

Images: From left to right: EIT 171, EIT 195, EIT 284, EIT 304 EIT (Extreme ultraviolet Imaging Telescope) images the solar atmosphere at several wavelengths, and therefore, shows solar material at different temperatures. In the images taken at 304 Angstrom the bright material is at 60,000 to 80,000 degrees Kelvin. In those taken at 171 Angstrom, at 1 million degrees. 195 Angstrom images correspond to about 1.5 million Kelvin, 284 Angstrom to 2 million degrees. The hotter the temperature, the higher you look in the solar atmosphere.

 
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LASCO C2 LASCO C3
 

The MDI (Michelson Doppler Imager) images shown here are taken in the continuum near the Ni I 6768 Angstrom line. The most prominent features are the sun spots.
 

LASCO (Large Angle Spectrometric Coronagraph) is able to take images of the solar corona by blocking the light coming directly from the Sun with an occulter disk, creating an artificial eclipse within the instrument itself.

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Sunspot numbers F10.7CM Radio flux AP
 
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The Solar Cycle is observed by counting the frequency and placement of sunspots visible on the Sun. Solar minimum occurred in December, 2008. Solar maximum in May, 2013.

 
Solar wind Satellite impact Xray flux
 
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On the left: Real-Time Solar Wind data broadcast from NASA's ACE satellite. Middle: The Satellite Environment Plot combines satellite and ground-based data to provide an overview of the current geosynchronous satellite environment. Right: 3-days of 5-minute solar x-ray flux values measured on the SWPC primary and secondary GOES satellites.

Auroral activity


Northern Auroral map Southern Auroral map
 

Instruments on board the NOAA Polar-orbiting Operational Environmental Satellite (POES) continually monitor the power flux carried by the protons and electrons that produce aurora in the atmosphere. SWPC has developed a technique that uses the power flux observations obtained during a single pass of the satellite over a polar region (which takes about 25 minutes) to estimate the total power deposited in an entire polar region by these auroral particles. The power input estimate is converted to an auroral activity index that ranges from 1 to 10.

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Conditions on the Sun and in the solar wind, magnetosphere, ionosphere and thermosphere that can influence the performance and reliability of space-borne and ground-based technological systems and can endanger human life or health. This introduction movie in the English language will open on a new tab/window when you click on the image below.



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Space Weather Images and Information (excluded from copyright) courtesy of:
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