• 3 weeks ago
A powerful solar flare recently occurred, but fortunately, it did not have a significant impact on Earth. However, it serves as a reminder of the potential dangers of solar flares and their effects on our planet. The solar flare was classified as a Coronal Mass Ejection (CME) and was traveling at three times the normal CME speed. This increased speed meant that the flare had the potential to cause significant disruptions to Earth's magnetic field and potentially damage electronic systems. The most disruptive solar storm ever recorded was the Carrington Event in 1859. Credit:
Shockwaves on The Sun: by NASA Goddard Space Flight Center, CC BY 2.0 https://creativecommons.org/licenses/by/2.0/
https://commons.wikimedia.org/wiki/File:X_Class_Solar_Flare_Sends_%E2%80%98Shockwaves%E2%80%99_on_The_Sun_(6819094556).jpg

Aurora: by NASA, https://commons.wikimedia.org/wiki/File:Aurora_as_seen_by_IMAGE.PNG

Solar Flare: by NASA/SDO https://svs.gsfc.nasa.gov/14592/
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00:00On July 23, 2024, Europe's Solar Orbiter spacecraft observed a super-powerful solar
00:07flare erupting from the far side of the Sun. This flare wasn't the most extreme ever recorded,
00:13but still, we got extremely lucky this time not to get fried by it. Such solar flares
00:19often cause long-lived raging radiation storms, and if such a storm moves in the direction
00:25of Earth, it can lead to worldwide blackouts. Before we go deeper into details of that
00:33potentially disastrous solar flare, we need to figure out what exactly this solar phenomenon
00:38is. Solar flares occur because the magnetic fields in the atmosphere of our star are moving
00:44non-stop. When the Sun is approaching its solar maximum, and that's the most active
00:49period of its 11-year-long cycle, which is, by the way, exactly what's happening now,
00:55its magnetic fields get more and more tangled, making our star look like an enormous ball
01:00of tangled rubber bands. They loop around, cross over one another, cut one another off,
01:06and then reconnect. Ever seen iron filings sprinkled on a bar magnet? These filings line
01:13up along the magnetic lines of force. Like that, the hot plasma on the surface of the
01:19Sun is at the mercy of the magnetic lines of force. Sometimes, when the magnetic fields
01:24interact with each other, some plasma gets disconnected from the fields, and its particles
01:29accelerate to immense speeds and send powerful radiation to space. That's what a solar flare
01:35is. Other times, our star throws off massive amounts of matter. Those events are coronal
01:42mass ejections, CMEs. Just one CME can contain as much as 20 billion tons of material. If
01:50that material were rock, it would create a mountain about 2.75 miles across and almost
01:56a half a mile tall. The ejected material often travels at a speed of over a million miles
02:02per hour. Solar flares and CMEs are the most powerful explosions in the solar system, releasing
02:10unimaginable amounts of energy. Solar flares have their own classification according to
02:15their strength. The smallest and weakened ones are A and B class. Then there are C and
02:21M class solar flares. And the strongest are X class flares. A number from 1 to 9, and
02:27in some cases a larger one, accompanies each letter. That's similar to the Richter scale
02:32for earthquakes. A and B class flares are too weak to affect our planet. As for C class
02:38flares, they may have small noticeable consequences. M class flares can cause short radio blackouts
02:44at the poles and weak radiation storms that can still harm astronauts. But the most dangerous
02:50of them all are X class flares. These are flares more than 10 times more powerful than
02:56X1. That's why the classification of X class flares can go higher than 9.
03:02Now let's get back to that recent solar flare. It was X14 class 1. Now we already know that
03:09it means it was an extra strong flare. Other large flares astronomers have detected recently
03:14include an X12 solar flare that happened on the 20th of May and an X10 flare that occurred
03:20on the 17th of July. All of them have come from the back side of the Sun.
03:27If we talk of the Earth side of our star, the largest solar flare that has been recorded
03:31so far within this solar cycle happened on the 14th of May. It was an X8.7 flare that
03:38led to radio blackouts. And a strong geomagnetic storm leading to magnificent auroras all over
03:44the world occurred a few days earlier. Powerful coronal mass ejections accompanied this storm.
03:51As for the July X class flare, it was so powerful that it could've ended up tragically for
03:56us. Luckily, all that magnetically charged plasma blast that accompanied the flare didn't
04:02travel in our direction. If it had, it would've been quite the solar storm. Auroras would've
04:07been incredibly impressive and a wee bit terrifying in their magnificence. But at
04:12the same time, such a dynamic blast of energetic particles hurtling our way could've caused
04:18major technological problems and electrical blackouts like the event in 1989 which severely
04:24harmed Quebec's power grid. Or a much much earlier catastrophe that still managed to
04:29cause a lot of harm to the world. I'm talking about the Carrington event which
04:35occurred in 1859 and was the first documented solar flare affecting our planet. It happened
04:41on the 1st of September and was named after Richard Carrington, the solar astronomer who
04:46witnessed the flare through his own telescope and sketched the Sun's sunspots. According
04:51to scientists, that flare was the most powerful documented solar storm over the last 500 years.
04:58The Carrington event triggered auroras that were visible as far south as the Caribbean.
05:03It led to severe interruptions in telegraph services all over the world, even shocking
05:08some telegraph operators and sparking fires after discharges from the lines ignited telegraph
05:14paper. Another major solar flare that erupted on the 4th of August, 1972, destroyed long-distance
05:21phone communication across a few states, including Illinois. This event even made the American
05:27telephone and telegraph company redesign its power system for transatlantic cables.
05:34Now let's move to March, 1985, when two super-powerful CMEs triggered a geomagnetic storm which,
05:41in turn, set off a power blackout in Canada on the 13th of March. This blackout left around
05:476 million people without electricity for 9 hours. It is said that the flare disrupted
05:52electric power transmission from the Hydro-Québec generation station and melted a few power
05:58transformers in New Jersey. And still, this solar flare was nowhere near the power of
06:03the Carrington event.
06:06The Bastille Day solar storm took its name from the French national holiday because it
06:11occurred on the same day, on the 14th of July in the year 2000. It was an X-5 class event
06:18that caused some satellites to short-circuit and resulted in radio blackouts. It's still
06:23one of the most highly observed solar storm events.
06:27From October to November, 2003, RSTAR unleashed a series of large solar flares and coronal
06:33mass ejections, and they did reach Earth and slam into our atmosphere. Those solar storms,
06:39also known as Halloween storms of 2003, caused aircraft to be rerouted, impacted satellite
06:46systems, and led to power outages in Sweden. Besides, the Solar and Heliospheric Observatory
06:52couldn't fulfill its functions during this solar onslaught.
06:56On the 28th of October, 2003, the Sun sent a whopper of a solar flare our way. The fire
07:03was so powerful, it overwhelmed the spacecraft sensor that was measuring it. The sensor topped
07:08out at a whopping X-28. But later, scientists figured out that the flare had reached a peak
07:13strength of about X-45.
07:18One more thing that made the Halloween storms so scary was that they happened during a time
07:22in the solar cycle when solar activity is usually quiet. That's 2 to 3 years after
07:28the solar maximum. According to NASA statistics, just 17 powerful flares erupted from our star
07:34during that time.
07:36The Sun spewed out another X-class solar flare on the 5th of December, 2006. It was an X-9
07:42class flare that disrupted satellite-to-ground communications and GPS navigational signals
07:48for around 10 minutes. That solar storm was so powerful, it even damaged the Solar X-ray
07:53Imager instrument on the GOES-13 satellite. It's the same damage to several pixels of
07:58its detector.
08:01In February 2022, SpaceX experienced the terrifying power of our star when a devastating geomagnetic
08:08storm destroyed 38 Starlink satellites worth tens of millions of dollars. It happened shortly
08:14after they were deployed. Unfortunately, Starlink satellites are especially vulnerable to geomagnetic
08:20storms since they're released into extremely low-altitude orbits, between 60 and 120 miles.
08:27They also rely on their onboard engines to overcome the drag force and raise themselves
08:31to their final altitude of around 350 miles over the surface of our planet.
08:38The thing is, during a geomagnetic storm, Earth's atmosphere absorbs energy from the
08:43storm, heats up, and extends upwards. It results in a denser thermosphere, which means more
08:49drag and it can be a serious issue for satellites. That's exactly what happened. The batch of
08:55newly released Starlink satellites didn't manage to overcome the increased drag and
08:59started to fall back, eventually burning up in the atmosphere.
09:06That's it for today! So hey, if you pacified your curiosity, then give the video a like
09:11and share it with your friends! Or if you want more, just click on these videos and
09:15stay on the Bright Side!

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