Recent north magnetic pole acceleration towards Siberia caused by flux lobe elongation

@article{Livermore2020RecentNM,
  title={Recent north magnetic pole acceleration towards Siberia caused by flux lobe elongation},
  author={Philip W. Livermore and Christopher C. Finlay and Matthew Bayliff},
  journal={Nature Geoscience},
  year={2020},
  volume={13},
  pages={387-391}
}
The wandering of Earth’s north magnetic pole, the location where the magnetic field points vertically downwards, has long been a topic of scientific fascination. Since the first in situ measurements in 1831 of its location in the Canadian arctic, the pole has drifted inexorably towards Siberia, accelerating between 1990 and 2005 from its historic speed of 0–15 km yr −1 to its present speed of 50–60 km yr −1 . In late October 2017 the north magnetic pole crossed the international date line… Expand

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References

SHOWING 1-10 OF 48 REFERENCES
Magnetic flux expulsion from the core as a possible cause of the unusually large acceleration of the north magnetic pole during the 1990s
[1] The north magnetic pole (NMP) has been drifting in a north-northwesterly direction since the 19th century. Both local surveys and geomagnetic models derived from observatory and satellite dataExpand
Magnetic poles and dipole tilt variation over the past decades to millennia
Due to the strong dipolar character of the geomagnetic field the shielding effect against cosmic and solar ray particles is weakest in the polar regions. We here present a comprehensive study of theExpand
An accelerating high-latitude jet in Earth’s core
Observations of the change in Earth’s magnetic field—the secular variation—provide information about the motion of liquid metal within the core that is responsible for the magnetic field’sExpand
Asymmetric behavior of magnetic dip poles
The north magnetic dip pole velocity has more than doubled in the last 30 years. This observation, together with the decrease in the Earth’s magnetic dipole intensity over the last century has raisedExpand
Persistent high paleosecular variation activity in southern hemisphere for at least 10 000 years
Abstract Direct observations of the geomagnetic field show that secular variation is strong in the Atlantic hemisphere, and comparatively reduced in the Pacific region. The dipole has been decayingExpand
Location of the North Magnetic Pole in April 2007
Observations have been made at five locations in the vicinity of the North Magnetic Pole (NMP). These were used in four different analyses—virtual geomagnetic pole, simple polynomial, spherical capExpand
Will the magnetic North Pole move to Siberia
The magnetic dip poles, defined as the surface points in the Northern and Southern hemispheres where the Earth's magnetic field is vertical, have been the topic of various research activities overExpand
Recent geomagnetic secular variation from Swarm and ground observatories as estimated in the CHAOS-6 geomagnetic field model
We use more than 2 years of magnetic data from the Swarm mission, and monthly means from 160 ground observatories as available in March 2016, to update the CHAOS time-dependent geomagnetic fieldExpand
Quasi-geostrophic flows responsible for the secular variation of the Earth's magnetic field
SUMMARY We present core flows constructed from high resolution secular variation (SV) models for the epochs 2001, 2002.5 and 2004, assuming that these flows are quasi-geostrophic in the coreExpand
Planetary gyre, time-dependent eddies, torsional waves, and equatorial jets at the Earth's core surface
We report a calculation of time-dependent quasi-geostrophic core flows for 1940-2010. Inverting recursively for an ensemble of solutions, we evaluate the main source of uncertainties, namely theExpand
...
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2
3
4
5
...