The Earth’s Magnetic Pole On The Move

The magnetic North Pole is hurtling towards Siberia so quickly scientists have had to release new data a year ahead of schedule to keep navigation systems working properly

  • World Magnetic Model (WMM) gives compasses the means to navigate north
  • WMM provides a five year forecast of changes to the Earth’s magnetic field 
  • The North Pole is moving so rapidly that current estimates weren’t accurate
  • Monday’s update showed the magnetic north is leaving the Canadian Arctic towards Siberia at a speed of around 34 miles (55km) per year 

Earth’s magnetic North Pole has been wildly shifting towards Russia so quickly that scientists have been forced to publish an update on its actual location a year early.

The World Magnetic Model (WMM) enables compasses to point north and is used in navigation systems. Its latest update revealed the North Magnetic Pole is wandering about 34 miles a year. It crossed the international dateline in 2017 and is leaving the Canadian Arctic on its way to Siberia.

This is causing a navigational nightmare for compasses in smartphones, boats and for airport navigators as well as in some consumer electronics, and WMM was forced to update a year early in order to keep it accurate.

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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 World Magnetic Model was updated on Monday, showing it is wandering about 34 miles (55 km) a year

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 World Magnetic Model was updated on Monday, showing it is wandering about 34 miles (55 km) a year

WMM provides a five year forecast of changes to the Earth’s magnetic field.  The US and UK tend to update the location of the North Magnetic Pole every five years in December, but this update came early because of the pole’s faster movement.

It had been hoped that the updated model could be released even earlier, last  month, but it was held up by the recent shutdown in the US government, which oversees the project along with the British Geological Survey in Edinburgh, Scotland.

Turbulence in in the planet’s core, where the motion generates an electric field, has caused the field to change in systems described as ‘akin to weather’.

Airplanes and boats also rely on magnetic north, usually as backup navigation, said University of Colorado geophysicist Dr Arnaud Chulliat, lead author of the WMM.

The military depends on where magnetic north is for navigation and parachute drops, while NASA, the Federal Aviation Administration and US Forest Service also use it. GPS is not affected because it’s satellite-based.

Airport runway names are also based on their direction toward magnetic north and their names change when the poles moved.

For example, the airport in Fairbanks, Alaska, renamed a runway 1L-19R to 2L-20R in 2009.

Since 1831 when it was first measured in the Canadian Arctic it has moved about 1400 miles (2300 km) towards Siberia.

The magnetic north pole is located at the white star and the individual lines in red and blue show the magentic field lines of Earth. These are used in navigation systems by boats and for airport navigators as well as in some consumer electronics

The magnetic north pole is located at the white star and the individual lines in red and blue show the magentic field lines of Earth. These are used in navigation systems by boats and for airport navigators as well as in some consumer electronics

Its speed jumped from about 9 mph (15 kph) to 34 mph (55 kph) since 2000.

The reason is turbulence in Earth’s liquid outer core. There is a hot liquid ocean of iron and nickel in the planet’s core where the motion generates an electric field, said University of Maryland geophysicist Dr Daniel Lathrop.

Dr Lathrop, who who wasn’t part of the team monitoring the magnetic north pole said: ‘It has changes akin to weather. We might just call it magnetic weather.’

WHY ARE THE EARTH’S MAGNETIC FIELDS MOVING?

The problem lies partly with the moving pole and partly with other shifts deep within the planet.

Liquid churning in Earth’s core generates most of the magnetic field, which varies over time as the deep flows change.

In 2016, for instance, part of the magnetic field temporarily accelerated deep under northern South America and the eastern Pacific Ocean. Satellites such as the European Space Agency’s Swarm mission tracked the shift.

The magnetic south pole is moving far slower than the north.

In general 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.

‘It’s not a question of if it’s going to reverse, the question is when it’s going to reverse,’ Dr Lathrop said.

When it reverses, it won’t be like a coin flip, but take 1,000 or more years, experts said.

Dr Lathrop sees a flip coming sooner rather than later because of the weakened magnetic field and an area over the South Atlantic has already reversed beneath Earth’s surface.

That could bother some birds that use magnetic fields to navigate. And an overall weakening of the magnetic field isn’t good for people and especially satellites and astronauts.

The magnetic field shields Earth from some dangerous radiation, Dr Lathrop said.

Scientists in recent years have predicted that Earth’s magnetic field could be gearing up to ‘flip’ – a shift in which the magnetic south pole would become magnetic north, and vice versa. Earth's magnetic field is illustrated above

Scientists in recent years have predicted that Earth’s magnetic field could be gearing up to ‘flip’ – a shift in which the magnetic south pole would become magnetic north, and vice versa. Earth’s magnetic field is illustrated above

WHAT COULD HAPPEN TO EARTH IF ITS POLES FLIPPED?

The Earth’s magnetic field is in a permanent state of change. 

Magnetic north drifts around and every few hundred thousand years the polarity flips so a compass would point south instead of north. 

The strength of the magnetic field also constantly changes and currently it is showing signs of significant weakening. 

Life has existed on the Earth for billions of years, during which there have been many reversals. 

There is no obvious correlation between animal extinctions and those reversals. Likewise, reversal patterns do not have any correlation with human development and evolution.

It appears that some animals, such as whales and some birds use Earth’s magnetic field for migration and direction finding.

Since geomagnetic reversal takes a number of thousands of years, they could well adapt to the changing magnetic environment or develop different methods of navigation.

Radiation at ground level would increase, however, with some estimates suggesting that overall exposure to cosmic radiation would double causing more deaths from cancer. ‘But only slightly,’ said Professor Richard Holme.

‘And much less than lying on the beach in Florida for a day. So if it happened, the protection method would probably be to wear a big floppy hat.’

The movement of the Earth’s magnetic poles are shown in this animation at 10-year intervals from 1970 to 2020. The red and blue lines sjpw the difference between magnetic north and true north depending on where you are standing. On the green line, a compass would point to true north. Credit: NOAA National Centers for Environmental Information

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 very highly charged particles can have a deleterious effect on the satellites and astronauts,’ added Dr Mona Kessel, a Magnetosphere discipline scientist at Nasa.

In one area, there is evidence that a flip is already occurring. ‘The increasing strength of the South Atlantic anomaly, an area of weak field over Brazil, is already a problem,’ said Professor Richard Holme.

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.

They claimed that fluctuations in the number of cosmic rays hitting the atmosphere directly alter the amount of cloud covering the planet.

Henrik Svensmark, a weather scientist at the Danish National Space Centre who led the team behind the research, believes that the planet is experiencing a natural period of low cloud cover due to fewer cosmic rays entering the atmosphere.

From:    https://www.dailymail.co.uk/sciencetech/article-6667057/Check-compass-The-magnetic-north-pole-move.html

Santa — Moving???

A new home for Santa Claus?

December 16, 2011

A new home for Santa Claus?U of T researchers say Guelph, Ontario tops the list of North American cities that suit Santa’s lifestyle. Credit: Martin Prosperity Institute graphic

(PhysOrg.com) — After the many years of commuting on Christmas Eve, jolly old St. Nicholas is reconsidering his home at the North Pole. Given his job description, extreme isolation has lost its appeal. In true Christmas spirit, the University of Toronto’s Martin Prosperity Insititute is offering Santa a top 10 list of places that would best suit him and his needs.

U of T researchers looked at five variables important to his lifestyle: (1) the number of cookie factories per capita; (2) the number of milk producers per capita; (3) the number of doll, toy and game manufacturing establishments per capita; (4) the number of postal service workers/couriers per capita (to receive and reply to wish lists); and (5) department stores per capita.

Hard work creates quite an appetite, and common knowledge supposes that Santa’s snack of choice is cookies. We looked at the number of cookie (and cracker) manufacturing establishments per 100,000 people in an area. Terre Haute, IN was a landslide winner in this respect, with 2.4 per 100,000 people. Next on the list were Fond du Lac, WI (2), Lewiston, ID (1.7) and Guelph, ON (1.6). There were over 200 metropolitan  with no cookie manufacturing establishments at all. If Santa were looking at the sheer number of cookie manufacturers, he should consider the New York area with 40 in total.

To wash down all of those cookies, Santa is going to need some milk. Researchers next looked next at the number of milk manufacturing establishments per 100,000 people. Saskatoon, SK is the leader in this category with 6.1 milk establishments per 100,000 people and 14 establishments in total. Up there with Saskatoon was Regina, SK with 4.7 per 100,000, St. Catharines/Niagara, ON with 2.9 and Abbotsford, BC with 2.6. Once again, there are some metro areas for Santa to avoid in terms of milk production as more than 150 of them have no reported milk manufacturers, including Charlotte, NC and San Jose, CA. In contrast, Toronto, ON has the most milk manufacturers with 25, followed by Vancouver, BC (19), Edmonton, AB (19) and Los Angeles, CA (17).

With the move also comes the need for a new toy factory and with 3.5 factories per 100,000 people, no other metro area beats Peterborough, ON. Victoria, BC sits in second place with 3.1 toy manufacturing establishments per 100,000 people. Next in the top 5 are Saint John, NB, Corvallis, OR and Ithaca, NY. In terms of the overall number of toy manufacturing establishments in the area, Toronto again ranks first with 77 toy manufacturers. Montreal, QC is next with 60, followed by Los Angeles with 54 and New York with 47.

 

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A new home for Santa Claus?
While checking his list to see who has been naughty and who has been nice, Santa also needs a reliable postal/courier service to receive and reply to children’s wish lists. The metro area with the most postal service workers/couriers per 100,000 is Des Moines, IA with 495. The area with the second most postal workers is the Greater Sudbury area in Ontario with 460.4 per 100,000 followed by Trenton, NJ with 434.3, Saint John, NB with 430.2 and Lynchburg, VA with 424.7.

Large metros such as New York and Los Angeles had the most postal service workers/couriers in terms of overall number of personnel, but they had lower numbers per capita due to their large populations. Interestingly, despite a declining population, Detroit, MI had more overall postal workers/couriers than the larger areas of Houston, TX and Atlanta, GA. The metro with the least amount of  workers/couriers per 100,000 people was Farmington, NM with only 49. The next three lowest were Hanford, CA; Prescott, AZ; and Fairbanks, AK.

Department stores are a crucial meeting place to see children before. Therefore, it was important to examine the number of department stores per capita in a given area so that Santa could maximize his appearances. Children of Elmira, NY have the greatest chance of sitting on Santa’s knee, with an abundant 9.1 department stores per 100,000 people — the highest number relative to the population. The top 5 also includes Lima, OH with 8.6 per 100,000 people, Missoula, MT with 8.5, Lewiston, ID with 8.4 and Sandusky, OH with 7.8.

Of course, if Santa were looking for the area with the highest total number of department stores he could visit the fashion and shopping capitals of New York, Chicago and Los Angeles. In terms of congestion though, the largest cities tend to have a low number of department stores per 100,000 people, which could lead to crowding. There are a number of cities with a low number of department stores that Santa might want to steer clear of, especially Hinesville, GA, which has no reported department stores in the area at all.

By combining the five variables to give each area an overall score, U of T researchers were able to create a top 10 list of ideal places for Santa to live. According to this analysis, Guelph, ON is the best suited destination for Santa. Overall, Guelph is a metro which offers Santa a good balance of the elements that define his lifestyle. Guelph received the highest overall score, largely thanks to its high  of cookie manufacturing establishments per 100,000 people, coupled with a good postal and courier service.

Williamsport, PA came in second with only a slightly lower overall score than Guelph. Like Guelph, Williamsport received balanced scores in all 5 categories. Williamsport is followed by Sherbrooke, QC; London, ON; St. Johns, NL; Peoria, IL; Hamilton, ON; Winnipeg, MB; Kitchener, ON; and Trois-Rivieres, QC — all great choices for Santa.

Santa might want to avoid Hinesville, GA, with no reported cookie manufacturers, milk manufacturers, toy manufacturers or department stores — an overall score of zero. Pascagoula, MS and Houma, LA also neared the bottom of the list and neither would suit Santa’s unique lifestyle very well.

Don’t worry, Santa won’t consider a move until after he makes his rounds this year. Regardless of where he chooses, have a safe and happy holiday season and all the best for 2012.

from:   http://www.physorg.com/news/2011-12-home-santa-claus.html