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In fact it has fired 5+ coronal mass ejections in quick succession that are Earth-directed. While the flares lead to radio blackouts, CMEs can cause problems for our satellites and power grids but also dazzling displays of auroras. (3/n)

SolarSteph 🌞

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95,856 次观看 • 2 年前 •via X (Twitter)

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Dr Steph Yardley🌞 的头像

Dr Steph Yardley🌞2 年前

Thought I would summarise why there is so much excitement in the space weather community right now. There’s a monstrous sunspot group on the Sun that’s massive enough to be visible to the naked eye (please use eclipse glasses) 🌞 👓 (1/n)

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Dr Steph Yardley🌞2 年前

This sunspot group has been continuously producing strong flares (GOES M & X) and a multitude of solar eruptions (CMEs) for which Earth is in the firing line. (2/n)

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Dr Steph Yardley🌞2 年前

We can model these CMEs to try and predict their arrival time at Earth. Currently we think they should arrive this evening and over the weekend (10/11 May). Therefore a G4 (severe geomagnetic storm) warning has been issued - the first time since 2005 (4/n)

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Dr Steph Yardley🌞2 年前

As these are predictions are based on models we don’t know exactly how this will play out however anyone at mid/high latitudes should definitely watch out for the Aurora this weekend! 🌞 💨 💨 💨 💨 💨 🌍 🛰️ 🚨 (5/n)

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Dr Steph Yardley🌞2 年前

It also looks like there is an ongoing solar energetic particle event. These are problematic as the particles arrive so quickly and the radiation can not only affect satellites but crewed space flight too (6/n)

Dr Steph Yardley🌞 的头像

Dr Steph Yardley🌞2 年前

Aurora in Loch Lomond (7/n)

Dr Steph Yardley🌞 的头像

Dr Steph Yardley🌞2 年前

Whilst I was busy taking photos last night we hit G5 (extreme geomagnetic storm) conditions - the first time since the 2003 “Halloween” storms. It’s worth watching out for Aurora this evening too 🤞 (8/n)

Dr Steph Yardley🌞 的头像

Dr Steph Yardley🌞2 年前

A lot of people have asked how big the group of sunspots is compared to Earth, hopefully this will give you an idea. ~14x🌎

Dr Steph Yardley🌞 的头像

Dr Steph Yardley🌞2 年前

If anyone wants to know more about the Aurora displays this weekend then you can watch me being interviewed on Sky News this afternoon @STFC_Matters @MSSLSpaceLab @DIPCehu

Dr Steph Yardley🌞 的头像

Dr Steph Yardley🌞2 年前

There have been some reports online of aircraft changing their flight paths and starlink satellite outages due to the ongoing geomagnetic storms (10/n)

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Dr Steph Yardley🌞2 年前

Updated models by @mathewjowens show that more CMEs are on their way tonight and tomorrow but Aurora may not be as strong as last nights show (11/n)

Dr Steph Yardley🌞 的头像

Dr Steph Yardley🌞2 年前

High solar wind speeds but northward Bz means not looking good for the aurora right now (11/n)

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Dr Steph Yardley🌞2 年前

You can find this thread along with some comments about the solar cycle and its relation to the aurora from yours truly in the @Independent

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38,506 次观看 • 1 年前

It’s #SunDay! This week’s space weather report includes: · 11 M-class flares · 0 C-class flares · 23 coronal mass ejections · 1 geomagnetic storm This video from NASA’s Solar Dynamics Observatory (SDO) shows the week’s activity. The highlight this week is a stunning M8.1-class flare and post-flare arcade beginning at about 0:26. See [For X: "the reply to this post"; For FB: "the following post"] for a close-up GIF of the event. Post-flare arcades are the series of loops of solar plasma that form right after a flare as the region cools down. Post-flare arcades allow us to watch the Sun's magnetic field restructure itself after an intense energy release. Plus, they're beautiful! 🤩 At about 2:27, the Sun starts shaking around a bit. It's not a "sunquake" — it's an SDO calibration maneuver! By periodically "jiggling" SDO's view of the Sun, scientists can ensure the spacecraft's optics are aligned and functioning properly. More on flares & coronal mass ejections:

It’s #SunDay! This week’s space weather report includes: · 11 M-class flares · 0 C-class flares · 23 coronal mass ejections · 1 geomagnetic storm This video from NASA’s Solar Dynamics Observatory (SDO) shows the week’s activity. The highlight this week is a stunning M8.1-class flare and post-flare arcade beginning at about 0:26. See [For X: "the reply to this post"; For FB: "the following post"] for a close-up GIF of the event. Post-flare arcades are the series of loops of solar plasma that form right after a flare as the region cools down. Post-flare arcades allow us to watch the Sun's magnetic field restructure itself after an intense energy release. Plus, they're beautiful! 🤩 At about 2:27, the Sun starts shaking around a bit. It's not a "sunquake" — it's an SDO calibration maneuver! By periodically "jiggling" SDO's view of the Sun, scientists can ensure the spacecraft's optics are aligned and functioning properly. More on flares & coronal mass ejections:

ARCHIVED - NASA Sun & Space

14,078 次观看 • 1 年前

Coal prices have risen internationally but Ukraine had nothing to do with #energy prices rising in Australia. Investment in #solar and #wind is to blame. It is important that the government in this country start facing reality and stop hiding the problem. The #Ukraine has nothing to do with #coal prices in this country. In fact, Australian coal prices did not rise at all under their existing long term contracts for our #coal-fired power stations. The government must stop misleading parliament that rising electricity prices in Australia are due to a war in the Ukraine. Massive solar and wind #subsidies are the cause of Australians suffering some of the highest #electricity prices in the world. Every time a coal fired power station is shut in this country we see yet the another spike in our power bills because unreliable #renewables cannot provide the same inexpensive baseload power supply. This government's Safeguard Mechanism Bill will add even more fines to reliable coal-fired power and yet more pain for Australian households. #UnitedNations #ClimateScam #Australia

Coal prices have risen internationally but Ukraine had nothing to do with #energy prices rising in Australia. Investment in #solar and #wind is to blame. It is important that the government in this country start facing reality and stop hiding the problem. The #Ukraine has nothing to do with #coal prices in this country. In fact, Australian coal prices did not rise at all under their existing long term contracts for our #coal-fired power stations. The government must stop misleading parliament that rising electricity prices in Australia are due to a war in the Ukraine. Massive solar and wind #subsidies are the cause of Australians suffering some of the highest #electricity prices in the world. Every time a coal fired power station is shut in this country we see yet the another spike in our power bills because unreliable #renewables cannot provide the same inexpensive baseload power supply. This government's Safeguard Mechanism Bill will add even more fines to reliable coal-fired power and yet more pain for Australian households. #UnitedNations #ClimateScam #Australia

Malcolm Roberts 🇦🇺

35,763 次观看 • 2 年前