Shifting in The Earth's Magentic Pole - Know all About it - Seeker's Thoughts

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Shifting in The Earth's Magentic Pole - Know all About it

 The impact of the recent shift in the Earth’s magnetic pole, and this is going to impact upon all the humanity, birds , and technology.

The constant shift is a problem for compasses in smartphones and some consumer electronics as well...
The military depends on where the magnetic north is for navigation and parachute drops, while NASA, the Federal Aviation Administration, and U.S. Forest Service also use it. 

The entire transportation sector, especially aviation and shipping, depends on correctly knowing the position of magnetic north. 
Airport runway names are based on their direction toward magnetic north and their names change when the poles moved. 

Similarly, it is crucial for militaries, for firing their missiles or for other purposes, and other civilian applications as well.





Birds and animals: Shifting would bother some birds that use magnetic fields to navigate. Very highly charged particles can have a deleterious effect on the satellites and astronauts. The Earth’s climate could also change. A recent Danish study has found that the earth’s weather has been significantly affected by the planet’s magnetic field.

The magnetic field shields Earth from some dangerous radiation. Electric grid collapse from severe solar storms is a major risk.

 As the magnetic field continues to weaken, scientists are highlighting the importance off-the grid energy systems using renewable energy sources to protect the Earth against a black out.

The alteration in the magnetic field during a reversal will weaken its shielding effect, allowing heightened levels of radiation on and above the Earth’s surface. Other adverse impacts are decreasing accuracy and frequent update of instruments, increased cost and inconvenience.

If geologic history repeats itself, Earth’s magnetic poles should eventually swap places. This much is undeniable. Based on the magnetic fingerprints locked into ancient rocks, we know that over the last 20 million years, magnetic north and south have flipped roughly every 200,000 to 300,000 years (this rate has not been constant over the planet’s lifetime, though).

The last of these major reversals occurred about 780,000 years ago, although the Poles do wander around in between these larger flips. Scientists estimate that past polar flips have been rather sluggish, with north and south migrating to opposite positions over thousands of years. This is both good and bad if you’re concerned about how a geomagnetic reversal will affect life on Earth.

                                   

The only major, noticeable effect that’s guaranteed to occur when the polar flop is finished is that your compass needle will tell you that North is in Antarctica and South is somewhere near Canada.
This will make the names of the American continents temporarily confusing (at least, on a geologic time scale) but it’ll make for a good story in classrooms.Another interesting consequence will be that animals that use Earth’s magnetic field for navigation—including birds, salmon, and sea turtles—could get lost during their routine journeys.

Eventually they will sort this out, and all other things being equal, life will go on. Lots of doomsday prophets have tried to equate geomagnetic flips with mass extinctions, but the data just aren’t there.

For centuries, navigators of the world’s oceans have been familiar with an effect of Earth’s magnetic field: It imparts a directional preference to the needle of a compass. Although in some settings magnetic orientation remains important, the modern science of geomagnetism has emerged from its romantic nautical origins and developed into a subject of great depth and diversity.

Also read - Land contributes 80% of the marine pollution

Concept of geomagnetism

The geomagnetic field is used to explore the dynamics of Earth’s interior and its surrounding space environment, and geomagnetic data are used for geophysical mapping, mineral exploration, risk mitigation, and other practical applications. Global distribution of ground-based magnetic observatories supports those pursuits by providing accurate records of the magnetic-field direction and intensity at fixed locations and over long periods of time.

Magnetic observatories were first established in the early 19th century in response to the influence of Alexander von Humboldt and Carl Friedrich Gauss. Since then, magnetic measurement has advanced significantly, progressing from simple visual readings of magnetic survey instruments to include automatic photographic measurement and modern electronic acquisition. To satisfy the needs of the scientific community, observatories are being upgraded to collect data that meet ever more stringent standards, to achieve higher acquisition frequencies, and to disseminate data in real-time.

Geomagnetism refers Earth’s magnetic field that extends from the Earth’s interior out into space, where it interacts with the solar wind, a stream of charged particles emanating from the Sun. The magnitude of the Earth’s magnetic field at its surface ranges from 25 to 65 microteslas (0.25 to 0.65 gauss).

 As an approximation, it is represented by a field of a magnetic dipole currently tilted at an angle of about 11 degrees with respect to Earth’s rotational axis, as if there were a bar magnet placed at that angle at the center of the Earth. The North geomagnetic pole, currently located near Greenland in the northern hemisphere, is actually the south pole of the Earth’s magnetic field, and conversely.

The origin of Earth’s magnetism lies in its outer core which is a more than 2,000-km layer that surrounds the central core or the innermost part.
The outer core is comprised of liquid iron and some other metals like nickel.
This liquid iron is in constant motion due to Earth’s rotation and various other reasons, and this motion produces a magnetic field.



Conclusion
Earth’s north magnetic pole has been drifting so fast in the last few decades that scientists say that past estimates are no longer accurate enough for precise navigation. The magnetic north pole is wandering about 55 kilometers a year. Earth’s magnetic field is getting weaker, leading scientists to say that it will eventually flip, where north and south pole changes polarity, like a bar magnet flipping over. It has happened numerous times in Earth’s past, but not in the last 780,000 years.

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