<p>Here's the how: very energetic charged particles interact with the Earth's magnetic field, and when they do so they emit electromagnetic radiation. If the energy of this radiation was high enough then when it reached wires/conductors at the Earth's surface the opposite effect would take place: ie the EM radiation would result in the flow of charged particles (a current). Such currents, if strong enough, could damage very many electronic and electric devices.</p>

<p>As to the possibility: it seems unlikely that such a high energy event would take place (ie to destroy all/nearly all electronic equipment), but it could be possible. We don't have sufficient data.</p>

CC BY-SA 3.0
2015-10-18T19:06:59.973Z
2015-10-18T19:33:45.017Z
2015-10-18T19:33:45.017Z
adrianmcmenamin
<blockquote>
  <p>Can a solar flare destroy every electronic item on earth?</p>
</blockquote>

<p><strong>Extreme Limit</strong><br>
Let's start with an extreme upper limit, a supernova.  So we know that a <a href="https://en.wikipedia.org/wiki/Supernova#Energy_output" rel="nofollow noreferrer">typical supernova</a> will not eradicate our atmosphere, as I discussed in detail at:  <a href="https://physics.stackexchange.com/a/233126/59023">https://physics.stackexchange.com/a/233126/59023</a>.  It would also not affect most of our technology unless it was really close (i.e., the sun would need to collapse, but our current understanding is that the sun will not undergo a supernova explosion).</p>

<p><strong>Power Grids</strong><br>
We also know that due to the properties of most power grids, the likelihood of numerous transformers suffering irreparable damage is quite low as well, as I discussed in detail at: <a href="https://physics.stackexchange.com/a/149199/59023">https://physics.stackexchange.com/a/149199/59023</a>.  The reason is that if one major <a href="https://en.wikipedia.org/wiki/Transformer" rel="nofollow noreferrer">transformer</a> were to fail, the rest of the grid would "trip" causing a temporary wide spread blackout.  The grid could, in principle, recover shortly afterwards work just fine.  Thus, so long as the duration of the large and rapid changes in the <a href="https://en.wikipedia.org/wiki/Magnetosphere" rel="nofollow noreferrer">Earth's magnetic field</a> from external influences (e.g., <a href="https://en.wikipedia.org/wiki/Coronal_mass_ejection" rel="nofollow noreferrer">coronal mass ejections</a> or CMEs) have subsided, the rest of the grid would be fine.  We have several groups actively studying the effects of the sun on Earth, as I discussed at:  <a href="https://physics.stackexchange.com/a/214509/59023">https://physics.stackexchange.com/a/214509/59023</a>.</p>

<p><strong>Solar Flares</strong><br>
Finally, contrary to what Hollywood might want you to believe, solar storms are not going to kill us (well, at least not directly).  I wrote a detailed answer at <a href="https://physics.stackexchange.com/a/258093/59023">https://physics.stackexchange.com/a/258093/59023</a> that basically explains why the combination of Earth's atmosphere and magnetic field shield us from most solar threats.  Spacecraft and astronauts, however, could be in harms way during very strong storms.</p>

<blockquote>
  <p>Is this really true and if so, how would it happen?</p>
</blockquote>

<p>Of course, it is possible to damage nearly all electrical devices with an <a href="https://en.wikipedia.org/wiki/Electromagnetic_pulse" rel="nofollow noreferrer">EMP</a>, but that does not mean the sun is capable of such a feat nor that it is likely to happen.  If the power grid were to catastrophically fail (i.e., dozens of major transformer failures), many electronic devices would still be fine and useable.  It's just that we would all have to buy small generators to use them because the electricity in your home wouldn't be on otherwise.</p>

<blockquote>
  <p>Could we do anything to to prevent it?</p>
</blockquote>

<p>Yes, it's rather simple.  If we know that a large <a href="https://en.wikipedia.org/wiki/Geomagnetic_storm" rel="nofollow noreferrer">geomagnetic storm</a> were about to occur, we could simply power down the grid.  The damage to transformers arises because the <a href="https://en.wikipedia.org/wiki/Geomagnetically_induced_current" rel="nofollow noreferrer">ground induced currents</a> produce a <a href="https://en.wikipedia.org/wiki/DC_bias" rel="nofollow noreferrer"><em>DC offset</em></a> in the voltage/current arriving at the transformer.  They are designed to convert power for a given frequency and amplitude.  Thus, if you shift a sine wave away from zero, the peaks will appear to the transformer as larger amplitude signals.  These will be <a href="https://en.wikipedia.org/wiki/Clipping_(signal_processing)" rel="nofollow noreferrer">clipped</a> initially but they create excess heat and internal stresses on the transformer.  Over time, the heat and stress cause the transformer to effectively tear it self apart (Note if you ever get to hear one explode, it's one of the loudest things you will likely hear.).</p>

<p>If there is no power in the system, then the DC offset will have no real effect for numerous reasons.  One could, in principle, also employ <a href="https://en.wikipedia.org/wiki/High-pass_filter" rel="nofollow noreferrer">high pass filters</a> but I am guessing cost and maintenance would be limiting factors.</p>

<p>The main vulnerability is our spacecraft in orbit and it's not the induced electromagnetic fields that will cause them issues.  Their biggest threat is high energy charged particles, which often come with large solar storms.  The details can be found in my answer at <a href="https://physics.stackexchange.com/a/258093/59023">https://physics.stackexchange.com/a/258093/59023</a>.</p>

CC BY-SA 3.0
2016-08-18T13:28:25.583Z
2016-08-18T13:28:25.583Z
2017-04-13T12:40:15.377Z
honeste_vivere
<p>I was reading a book about the sun which suggested that a solar flare can destroy every electronic item on Earth. Is this really true and if so, how would it happen? Could we do anything to to prevent it? </p>

CC BY-SA 3.0
2015-10-14T13:52:05.613Z
This book was probably talking about a [solar superstorm](https://en.wikipedia.org/wiki/Solar_storm_of_1859).
called2voyage
CC BY-SA 3.0
2015-10-14T19:52:47.923Z
Which book? And are you sure it talked about "flares". Give exact quotes and references if possible.
James K
CC BY-SA 3.0
2015-10-15T09:54:59.987Z
it may be a solar storm and same I watched program is "Stripe the cosmos" on discovery science ..
Ajay meena
CC BY-SA 4.0
2021-11-23T07:41:28.887Z
The answers below are sufficient for the most part, and while it is extremely unlikely, a modern-day Carrington Event (the largest geomagnetic storm in history that we know of) has been estimated to cost the US 2.6 trillion dollars alone. Furthermore, our infrastructure is *not* prepared for it. An associate of mine works very hard trying to convince the US government to make serious changes to the infrastructure to make us ready, but the solution is so expensive that it falls on ears that don’t want to think about it. We missed an event like this in 2012 by just over a week in our orbit.
Justin T
<the-sun><flare>
Can a solar flare destroy every electronic item on earth?
Ajay meena
# Can a solar flare destroy every electronic item on earth?

(Asked by: username_0 on 2015-10-14)

I was reading a book about the sun which suggested that a solar flare can destroy every electronic item on Earth. Is this really true and if so, how would it happen? Could we do anything to to prevent it?

**Tags:** the-sun, flare

> **Comments:**
> **username_1**: This book was probably talking about a [solar superstorm](https://en.wikipedia.org/wiki/Solar_storm_of_1859).  
> **username_2**: Which book? And are you sure it talked about "flares". Give exact quotes and references if possible.  
> **username_0**: it may be a solar storm and same I watched program is "Stripe the cosmos" on discovery science ..  
> **username_3**: The answers below are sufficient for the most part, and while it is extremely unlikely, a modern-day Carrington Event (the largest geomagnetic storm in history that we know of) has been estimated to cost the US 2.6 trillion dollars alone. Furthermore, our infrastructure is *not* prepared for it. An associate of mine works very hard trying to convince the US government to make serious changes to the infrastructure to make us ready, but the solution is so expensive that it falls on ears that don’t want to think about it. We missed an event like this in 2012 by just over a week in our orbit.  

---

## 2 answers

### Answer by username_4 on 2015-10-18. Score: 1 | Accepted answer

Here's the how: very energetic charged particles interact with the Earth's magnetic field, and when they do so they emit electromagnetic radiation. If the energy of this radiation was high enough then when it reached wires/conductors at the Earth's surface the opposite effect would take place: ie the EM radiation would result in the flow of charged particles (a current). Such currents, if strong enough, could damage very many electronic and electric devices.

As to the possibility: it seems unlikely that such a high energy event would take place (ie to destroy all/nearly all electronic equipment), but it could be possible. We don't have sufficient data.


---

### Answer by username_5 on 2016-08-18. Score: 3

> Can a solar flare destroy every electronic item on earth?

**Extreme Limit**  
Let's start with an extreme upper limit, a supernova. So we know that a [typical supernova](https://en.wikipedia.org/wiki/Supernova#Energy_output) will not eradicate our atmosphere, as I discussed in detail at: <https://physics.stackexchange.com/a/233126/59023>. It would also not affect most of our technology unless it was really close (i.e., the sun would need to collapse, but our current understanding is that the sun will not undergo a supernova explosion).

**Power Grids**  
We also know that due to the properties of most power grids, the likelihood of numerous transformers suffering irreparable damage is quite low as well, as I discussed in detail at: <https://physics.stackexchange.com/a/149199/59023>. The reason is that if one major [transformer](https://en.wikipedia.org/wiki/Transformer) were to fail, the rest of the grid would "trip" causing a temporary wide spread blackout. The grid could, in principle, recover shortly afterwards work just fine. Thus, so long as the duration of the large and rapid changes in the [Earth's magnetic field](https://en.wikipedia.org/wiki/Magnetosphere) from external influences (e.g., [coronal mass ejections](https://en.wikipedia.org/wiki/Coronal_mass_ejection) or CMEs) have subsided, the rest of the grid would be fine. We have several groups actively studying the effects of the sun on Earth, as I discussed at: <https://physics.stackexchange.com/a/214509/59023>.

**Solar Flares**  
Finally, contrary to what Hollywood might want you to believe, solar storms are not going to kill us (well, at least not directly). I wrote a detailed answer at <https://physics.stackexchange.com/a/258093/59023> that basically explains why the combination of Earth's atmosphere and magnetic field shield us from most solar threats. Spacecraft and astronauts, however, could be in harms way during very strong storms.

> Is this really true and if so, how would it happen?

Of course, it is possible to damage nearly all electrical devices with an [EMP](https://en.wikipedia.org/wiki/Electromagnetic_pulse), but that does not mean the sun is capable of such a feat nor that it is likely to happen. If the power grid were to catastrophically fail (i.e., dozens of major transformer failures), many electronic devices would still be fine and useable. It's just that we would all have to buy small generators to use them because the electricity in your home wouldn't be on otherwise.

> Could we do anything to to prevent it?

Yes, it's rather simple. If we know that a large [geomagnetic storm](https://en.wikipedia.org/wiki/Geomagnetic_storm) were about to occur, we could simply power down the grid. The damage to transformers arises because the [ground induced currents](https://en.wikipedia.org/wiki/Geomagnetically_induced_current) produce a [*DC offset*](https://en.wikipedia.org/wiki/DC_bias) in the voltage/current arriving at the transformer. They are designed to convert power for a given frequency and amplitude. Thus, if you shift a sine wave away from zero, the peaks will appear to the transformer as larger amplitude signals. These will be [clipped](https://en.wikipedia.org/wiki/Clipping_(signal_processing)) initially but they create excess heat and internal stresses on the transformer. Over time, the heat and stress cause the transformer to effectively tear it self apart (Note if you ever get to hear one explode, it's one of the loudest things you will likely hear.).

If there is no power in the system, then the DC offset will have no real effect for numerous reasons. One could, in principle, also employ [high pass filters](https://en.wikipedia.org/wiki/High-pass_filter) but I am guessing cost and maintenance would be limiting factors.

The main vulnerability is our spacecraft in orbit and it's not the induced electromagnetic fields that will cause them issues. Their biggest threat is high energy charged particles, which often come with large solar storms. The details can be found in my answer at <https://physics.stackexchange.com/a/258093/59023>.


---

