Fluctuations in Earth's magnetic field due to changing solar activity can wreak havoc with communications, even those using underground cables. How is this possible?

Short Answer

Expert verified
Fluctuations in Earth's magnetic field due to changing solar activity can wreak havoc with communications, including those using underground cables, because the changes in magnetic field can induce disruptive currents in long conductive structures such as power lines and underground cables, disrupting their regular operation.

Step by step solution

01

Understanding Earth's Magnetic Field

Firstly, it has to be understood that Earth's magnetic field is like a gigantic bar magnet with its poles near the geographic poles. The magnetic field of the Earth extends far into space and it interacts with the solar wind, a stream of charged particles emanating from the sun.
02

Understanding Solar Activity and its Impact

Solar activity can greatly influence the Earth's magnetic field. During the periods of high solar activity, solar flares and coronal mass ejections can cause geomagnetic storms. These storms distort and disturb the Earth's magnetic field.
03

Effect on Communication

The distortion in Earth's magnetic field can affect radio communications, both over the air and through cables. While it is understandable for the signals traveling through the air (like in satellite communications), the effect on underground cables seems counterintuitive. But underground cables are not completely immune. The geomagnetic storms induce currents in long conductive structures, like power lines and underground cables. The induced current can disrupt the normal operation of these lines leading to disruptions in communications.
04

Conclusion

So, even though the cables are underground and shielded from direct exposure to the solar radiation, fluctuations in the Earth's magnetic field due to changing solar activity can create disruptive currents, affecting communication.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with Vaia!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Study anywhere. Anytime. Across all devices.

Sign-up for free