Earth’s magnetic field is weakening. This phenomenon may be later than the days that are long.
For billions of years, the Earth has been protected by a natural crust. known as Earth’s magnetic fieldThis coating does not encourage the effects of geomagnetic storms Its source is the sun, as well Cosmic radiation generated by galaxies and other celestial bodies in the universe. This sustains life on our planet as we know it so far.
Recently, a team of astrophysicists discovered that Earth’s magnetic field get weak. Although it may seem a tragedy for the biosphere, researchers say these kinds of phenomena are natural. In fact, they appear approximately every 400,000 years. This does not mean that, however, Speak unchanged on the ground.
On the contrary, scientists say that the weakness of this natural armor is Producing longer days on our planet. this is the reason.
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The days on Earth weren’t always 24 hours
phenomenon Weakness in the Earth’s magnetic field It was first recorded in 2020. According to Serbian astronomer Milutin MilankovicAnd the This difference can cause Important changes in snow periods of our planet in the next hundreds of thousands of years.
Following his line of research, contemporary researchers have wondered If the Earth’s rotation is uniform,and how it relates to our magnetic field. After decades of research, it has been agreed that the days on our planet did not always last the same. In fact, as documented National Geographic Spain1400 million years ago, They only lasted 19 hours.
Earth’s geological history has encouraged our planet’s rotational motion to be slower and slower. These processes take billions of years. However, recently registration who – which The shortest day in history was Friday 29 July 2022.
Through the technology of atomic clocks, it is possible to measure how long it takes for a complete revolution of our planet on its axis. The researchers documented that that day lasted.1.59 ms [menos que] Its duration is about 24 hours.‘, docs Very interesting Mexico.
Days on Earth don’t always last the same
As Director of the Australian Center for Excellence in Antarctic Science at the University of Tasmania, Matt King knows that The Earth’s rotation wasn’t always the same. In fact, the days on Earth have become increasingly longer since the end of the second Ice Age:
«[…] When the last ice age ended, the melting of the polar ice caps lowered the surface pressure and the Earth’s mantle began to move constantly towards the poles,” the specialist wrote in Conversation.
This caused that for about 20,000 years, The days on earth are getting longer and longer. However, this is not the only theory out there in this regard. Other scientists assert that the influence of the Moon, our only natural satellite, is also an influence The determining factor of the length of days on this planet.
On the other hand, the movement of the seas and their relationship to the global climate can also be involved in these changes. thus, There is no scientific certainty to support this phenomenon.. At most, researchers from different fields of specialization assert that this phenomenon comes from several factors, taken together, Make the days on earth longer —or in short, in his case.
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