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… 

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References

SHOWING 1-10 OF 47 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 data

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 the

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’s

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 raised

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 cap

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 over

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 field

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 core

Geomagnetic forecasts driven by thermal wind dynamics in the Earth's core

There exists a fundamental as well as practical interest in being able to accurately forecast the future evolution of Earth's magnetic field at decadal to secular ranges. This work enables such