World's Best Scientists 2026 revealed!
Award Badge
Earth Science
Finland
2025

D-Index & Metrics

Earth Science

D-Index
50
Citations
7445
World Ranking
3485
National Ranking
4

Research.com Recognitions

  • 2025 - Research.com Earth Science in Finland Leader Award
  • 2023 - Research.com Earth Science in Finland Leader Award
  • 2022 - Research.com Earth Science in Finland Leader Award

Overview

Ari Viljanen is affiliated with the Finnish Meteorological Institute in Finland and has made contributions across multiple intersecting scientific fields, primarily focusing on Earth and planetary sciences, physics and astronomy, and biochemistry, genetics, and molecular biology. Their research spans geophysics, astronomy and astrophysics, molecular biology, global and planetary change, and atmospheric science.

The scientist's main topical areas of work include earthquake detection and analysis, ionosphere and magnetosphere dynamics, geomagnetism and paleomagnetism studies, solar and space plasma dynamics, geophysical and geoelectrical methods, seismic waves and analysis, as well as atmospheric aerosols and clouds.

Recent notable publications by Ari Viljanen include:

  • "Auroral Omega Bands are a Significant Cause of Large Geomagnetically Induced Currents," 2020, Geophysical Research Letters
  • "On the Regional Variability of dB/dt and Its Significance to GIC," 2020, Space Weather
  • "Induced currents due to 3D ground conductivity play a major role in the interpretation of geomagnetic variations," 2020, Annales Geophysicae
  • "Citizen Scientists Discover a New Auroral Form: Dunes Provide Insight Into the Upper Atmosphere," 2020, AGU Advances
  • "Modeling the Geomagnetic Response to the September 2017 Space Weather Event Over Fennoscandia Using the Space Weather Modeling Framework: Studying the Impacts of Spatial Resolution," 2021, Space Weather

Frequent coauthors contributing to Ari Viljanen's research include Liisa Juusola, A. P. Dimmock, Elena Marshalko, Mikhail Kruglyakov, and L. Rosenqvist. These collaborations have supported work published primarily in venues such as Space Weather, Annales Geophysicae, Zenodo (CERN European Organization for Nuclear Research), Geophysical Research Letters, and AGU Advances.

Ari Viljanen's publishing record shows a strong focus on journals dedicated to space weather and geophysical phenomena, with multiple contributions to Space Weather and Annales Geophysicae. Their work integrates observational and modeling approaches to study geomagnetic variations and their associated impacts.

Best Publications

  • Ionospheric disturbance magnetic field continuation from the ground to the ionosphere using spherical elementary current systems

    O. Amm;A. Viljanen

  • Geomagnetic storm of 29–31 October 2003: Geomagnetically induced currents and their relation to problems in the Swedish high-voltage power transmission system

    Antti Pulkkinen;Sture Lindahl;Ari Viljanen;Risto Pirjola

  • Geomagnetically induced currents: Science, engineering, and applications readiness

    Antti Pulkkinen;E. Bernabeu;A. Thomson;A. Viljanen

  • Time derivative of the horizontal geomagnetic field as an activity indicator

    A. Viljanen;H. Nevanlinna;K. Pajunpää;A. Pulkkinen

  • Geomagnetically induced currents in the Finnish high-voltage power system

    A. Viljanen;R. Pirjola

  • Application and validation of the spherical elementary currents systems technique for deriving ionospheric equivalent currents with the North American and Greenland ground magnetometer arrays

    James M. Weygand;Olaf Amm;A. Viljanen;V. Angelopoulos

  • Space weather events in July 1982 and October 2003 and the effects of geomagnetically induced currents on Swedish technical systems

    Magnus Wik;Magnus Wik;R. Pirjola;Henrik Lundstedt;A. Viljanen

  • Ionospheric equivalent current distributions determined with the method of spherical elementary current systems

    Antti Pulkkinen;Olaf Amm;Ari Viljanen

  • Calculation of geomagnetically induced currents in the 400 kV power grid in southern Sweden

    Magnus Wik;Magnus Wik;A. Viljanen;R. Pirjola;A. Pulkkinen;A. Pulkkinen

  • Recordings of geomagnetically induced currents and a nowcasting service of the Finnish natural gas pipeline system

    A. Viljanen;A. Pulkkinen;A. Pulkkinen;R. Pirjola;R. Pirjola;K. Pajunpää

  • Fast computation of the geoelectric field using the method of elementary current systems and planar Earth models

    A. Viljanen;A. Pulkkinen;O. Amm;R. Pirjola

  • Recordings and occurrence of geomagnetically induced currents in the Finnish natural gas pipeline network

    Antti Pulkkinen;Ari Viljanen;Kari Pajunpää;Risto Pirjola

  • Complex image method for calculating electric and magnetic fields produced by an auroral electrojet of finite length

    R. Pirjola;A. Viljanen

  • The Relation Between Geomagnetic Variations and Their Time Derivatives and Implications for Estimation of Induction Risks

    Ari Viljanen

  • Modelling of space weather effects on pipelines

    Antti Pulkkinen;Risto Pirjola;David Boteler;Ari Viljanen

  • Geomagnetically induced currents in an electric power transmission system at low latitudes in Brazil: A case study

    Nalin B. Trivedi;Ícaro Vitorello;Wanderli Kabata;Severino L. G. Dutra

  • Atmospheric data over a solar cycle: no connection between galactic cosmic rays and new particle formation

    M. Kulmala;I. Riipinen;I. Riipinen;T. Nieminen;M. Hulkkonen

  • Characteristics of extreme geoelectric fields and their possible causes: Localized peak enhancements

    Chigomezyo M. Ngwira;Chigomezyo M. Ngwira;Antti A. Pulkkinen;Emanuel Bernabeu;Jan Eichner

  • Observations of Substorm Electrodynamics Using the MIRACLE Network

    M. T. Syrjäsuo;T. I. Pulkkinen;P. Janhunen;A. Viljanen

  • Space weather risk

    Risto Pirjola;Kirsti Kauristie;Hanna Lappalainen;Ari Viljanen

  • Modeling geomagnetically induced currents during different ionospheric situations

    Ari Viljanen;Olaf Amm;Risto Pirjola

Frequent Co-Authors

Risto Pirjola
Risto Pirjola Natural Resources Canada
Antti Pulkkinen
Antti Pulkkinen Goddard Space Flight Center
Tuija Pulkkinen
Tuija Pulkkinen University of Michigan–Ann Arbor
James A. Slavin
James A. Slavin University of Michigan–Ann Arbor
Eric Donovan
Eric Donovan University of Calgary
Hermann Lühr
Hermann Lühr University of Potsdam
Kalevi Mursula
Kalevi Mursula University of Oulu
Pekka T. Verronen
Pekka T. Verronen Finnish Meteorological Institute
Daniel N. Baker
Daniel N. Baker University of Colorado Boulder
Hannu E. J. Koskinen
Hannu E. J. Koskinen University of Helsinki

If you think any of the details on this page are incorrect, let us know.

Report an issue

We appreciate your kind effort to assist us to improve this page, it would be helpful providing us with as much detail as possible in the text box below:

Related Online Degrees & Career Pathways

Studying Earth Science in the USA opens doors to various interdisciplinary fields. Many students complement their environmental knowledge with skills in other areas. For those interested in enhancing their communication abilities, pursuing an online mfa creative writing program can help articulate complex scientific concepts effectively.

Management roles in environmental organizations often benefit from advanced training in leadership and personnel management. An online masters in human resource management is a popular pathway to develop these skills while maintaining flexibility.

Career shifts later in life are increasingly common, with many older adults seeking meaningful work related to Earth Science. Identifying the best degrees for older adults can provide tailored educational opportunities that suit varied life experiences and schedules.

For those looking to manage environmental data and archives, degrees from ala-accredited schools offer respected credentials in library and information science, complementing Earth Science expertise with strong research and cataloging skills.

Best Scientists Citing Ari Viljanen

Trending Scientists

Recently Published Articles