1887
  1. Home
  2. Conferences
  3. Conference Proceedings
  4. 17th International Conference Monitoring of Geological Processes and Ecological Condition of the Environment
  5. Conference paper
PDF

Abstract

Summary

The magnetic field of the Earth is continuously changing and its variations have wide spectrum from ≈0 to many megaHertz. This work deals with narrow part of that spectrum: from 150 to 6000 s and monitors variations of the geomagnetic field’s slope (incline). The induction vector was used as a quantitative estimate of the slope. Three components of magnetic field records at 137 observatories of the network «Intermagnet» have been processed for 1991–2014 years and time-series of 4 induction vector components were obtained. The resulting records are filled with irregular and periodic variations (especially annual ones), but the main interest of this work is trends. The largest trend of magnitude 0.2 in all periods, but only in the real northern component, is found in southern Greenland and can be well explained by the melting of glaciers occurring in recent decades as a result of global warming. Trends observed in several observatories of North America and Greenland can be related with extraordinary fast movement of the North magnetic pole (1100 km for 1990–2014 years).

EAGE Publications BV © 2023 The Authors © European Association of Geoscientists and Engineers
Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.2023520247
2023-11-07
2025-04-30

  • From This Site

    /content/papers/10.3997/2214-4609.2023520247
    dcterms_title,dcterms_subject,pub_keyword
    -contentType:Journal -contentType:Contributor -contentType:Concept -contentType:Institution
    10
    5
Loading full text...

Full text loading...

/deliver/fulltext/2214-4609/2023/monitoring'2023/Mon23-247.html?itemId=/content/papers/10.3997/2214-4609.2023520247&mimeType=html&fmt=ahah

References

  1. Araya, J.V. & Ritter, O., 2016. Source effects in mid-latitude geomagnetic transfer functions, Geophys. J. Int., 204, 606–630. doi: 10.1093/gji/ggv474.
     https://doi.org/10.1093/gji/ggv474 [Google Scholar]
  2. BabakV.I. & RokityanskyI.I.,2018. Monitoring of geomagnetic induction vector.17th International Conference on Geoinformatics – Theoretical and Applied Aspects, 14–17 May 2018, Kiev, Ukraine. doi: 10.3997/2214‑4609.201801773.
     https://doi.org/10.3997/2214-4609.201801773 [Google Scholar]
  3. IGRF, 2021. Alken, P., Thébault, E., Beggan, C.D. et al.International Geomagnetic Reference Field: the thirteenth generation.Earth Planets Space, 73, (49) doi: 10.1186/s40623‑020‑01288‑x
     https://doi.org/10.1186/s40623-020-01288-x [Google Scholar]
  4. Kopytenko et al., 2020. The Study of Auroral Oval Position Changes in Terms of Moving of the Earth’s Magnetic Pole.Problems of Geocosmos—2018, Springer Proceedings in Earth and Environmental Sciences.https://doi.org/10.1007/978-3-030-21788-4_25
     [Google Scholar]
  5. Kuvshinov, A., Grayver, A., Tøfner-Clausen, L. & Olsen, N., 2021. Probing 3-D electrical conductivity of the mantle using 6 years of Swarm, CryoSat-2 and observatory magnetic data and exploiting matrix Q-responses approach. Earth, Planets and Space, 73(67). https://doi.org/10.1186/s40623-020-01341-9
     [Google Scholar]
  6. Rikitake, T., 1966. Electromagnetism and the Earth’s Interior. Amsterdam, London, New York: Elsevier, 308 p.
     [Google Scholar]
  7. Rokityansky, I.I., 1982. Geoelectromagnetic investigation of the Earth’s crust and upper mantle.Berlin-Heidelberg-New York: Springer Verlag, 381 p.
     [Google Scholar]
  8. Tsyganenko, N.A.2019. Secular drift of the auroral ovals: How fast do they actually move?Geophysical Research Letters, 46, 3017–3023. https://doi.org/10.1029/2019GL082159
     [Google Scholar]
  9. Zvereva, T.I., 2012. Motion of the Earth’s Magnetic Poles in the Last Decade.Geomagnetism and Aeronomy, 52, 2, 261–269. doi: 10.1134/S0016793212020168
     https://doi.org/10.1134/S0016793212020168 [Google Scholar]
/content/papers/10.3997/2214-4609.2023520247
Loading
Monitoring Geomagnetic Field Variations’ Slope
Conference Proceedings 2023, 1 (2023); https://doi.org/10.3997/2214-4609.2023520247
/content/papers/10.3997/2214-4609.2023520247
/content/papers/10.3997/2214-4609.2023520247
Loading

Data & Media loading...

Most Cited This Month Most Cited RSS feed

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error