Animation Earth’s magnetic field changes over time

>> YOUR LINK HERE: ___ http://youtube.com/watch?v=aL4UEcY_DOA

Earth is surrounded by a constantly changing magnetic field that shields our habitat against harmful radiation from cosmic rays and the solar wind. A new study in AGU’s journal Reviews of Geophysics summarizes what scientists currently know about how Earth’s magnetic field has evolved over the past 100,000 years. • This animation shows how the intensity of Earth’s magnetic field changed from 44,000 to 38,000 years ago. Around 41,000 years ago, a geomagnetic excursion happened, when the global geomagnetic field intensity reduced dramatically. This event, known as the Laschamp excursion, is the best-documented geomagnetic excursion; evidence of it has been found in geological records around the world. You can see the intensity of the field change from pink (strong) to white (weak) as time progresses. • Credit: Alexander Jordan, GFZ Potsdam. • Read more about the evolution of Earth’s magnetic field on eos.org: • https://eos.org/editors-vox/the-globa... • Read the Reviews of Geophysics study here: • https://agupubs.onlinelibrary.wiley.c...

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