All Stories

  1. What does solar chromospheric activity look like under different inclination angles?

    Article • EAS Publications Series, June 2025, EDP Sciences

    Dr Frédéric Clette

  2. Solar flare rates and probabilities based on the McIntosh classification: Impacts of GOES/XRS rescaling and revisited sunspot classifications

    Article • Journal of Space Weather and Space Climate, January 2025, EDP Sciences

    Dr Frédéric Clette

  3. The McNish and Lincoln Solar-Activity Predictions: The Method and Its Performance

    Article • Solar Physics, February 2024, Springer Science + Business Media

    Dr Frédéric Clette

  4. The Extreme Space Weather Event of 1872 February: Sunspots, Magnetic Disturbance, and Auroral Displays

    Article • The Astrophysical Journal, December 2023, American Astronomical Society

    Dr Frédéric Clette, José Ribeiro

  5. Magnitude Estimates for the Carrington Flare in 1859 September: As Seen from the Original Records

    Article • The Astrophysical Journal Letters, August 2023, American Astronomical Society

    Dr Frédéric Clette

  6. Recalibration of the Sunspot-Number: Status Report

    Article • Solar Physics, March 2023, Springer Science + Business Media

    Dr Frédéric Clette

  7. Diagnosing and calibrating the multi-century Sunspot Number Series

    Article • June 2022, Copernicus GmbH

    Dr Frédéric Clette

  8. Reconstructing the Sunspot Number : challenges and impact

    Article • June 2022, Copernicus GmbH

    Dr Frédéric Clette

  9. Predicting the solar cycle amplitude with the new catalogue of hemispheric sunspot numbers

    Article • March 2022, Copernicus GmbH

    Dr Frédéric Clette

  10. Reconstruction of the Sunspot Number Source Database and the 1947 Zurich Discontinuity

    Article • Solar Physics, September 2021, Springer Science + Business Media

    Dr Frédéric Clette

  11. Hemispheric sunspot numbers 1874–2020

    Article • EAS Publications Series, August 2021, EDP Sciences

    Dr Frédéric Clette

  12. Is the F10.7cm – Sunspot Number relation linear and stable?

    Article • Journal of Space Weather and Space Climate, January 2021, EDP Sciences

    Dr Frédéric Clette

  13. A Sunspot Catalog for the Period 1952 – 1986 from Observations Made at the Madrid Astronomical Observatory

    Article • Solar Physics, December 2018, Springer Science + Business Media

    Dr Frédéric Clette

  14. The new Sunspot Number: continuing upgrades and possible impacts

    Article • Proceedings of the International Astronomical Union, February 2018, Cambridge University Press

    Dr Frédéric Clette

  15. Multi-instrument observations of the solar eclipse on 20 March 2015 and its effects on the ionosphere over Belgium and Europe

    Article • Journal of Space Weather and Space Climate, January 2017, EDP Sciences

    Johan De Keyser, Dr Frédéric Clette

  16. Preface to Topical Issue: Recalibration of the Sunspot Number

    Article • Solar Physics, November 2016, Springer Science + Business Media

    Dr Frédéric Clette

  17. The New Sunspot Number: Assembling All Corrections

    Article • Solar Physics, November 2016, Springer Science + Business Media

    Dr Frédéric Clette

  18. A Revised Collection of Sunspot Group Numbers

    Article • Solar Physics, September 2016, Springer Science + Business Media

    Dr Frédéric Clette

  19. Uncertainties in the Sunspot Numbers: Estimation and Implications

    Article • Solar Physics, September 2016, Springer Science + Business Media

    Dr Frédéric Clette

  20. Extreme Geomagnetic Storms – 1868 – 2010

    Article • Solar Physics, May 2016, Springer Science + Business Media

    Dr Frédéric Clette

  21. Detailed Analysis of Solar Data Related to Historical Extreme Geomagnetic Storms: 1868 – 2010

    Article • Solar Physics, April 2016, Springer Science + Business Media

    Dr Frédéric Clette

  22. The Revised Brussels–Locarno Sunspot Number (1981 – 2015)

    Article • Solar Physics, April 2016, Springer Science + Business Media

    Dr Frédéric Clette

  23. Active Latitude Oscillations Observed on the Sun

    Article • Solar Physics, April 2016, Springer Science + Business Media

    Dr Frédéric Clette

  24. Revision of the Sunspot Number(s)

    Article • Space Weather, September 2015, American Geophysical Union (AGU)

    Dr Frédéric Clette

  25. Revisiting the Sunspot Number

    Article • January 2015, Springer Science + Business Media

    Dr Frédéric Clette

  26. Revisiting the Sunspot Number

    Article • Space Science Reviews, August 2014, Springer Science + Business Media

    Dr Frédéric Clette

  27. Survey and Merging of Sunspot Catalogs

    Article • Solar Physics, November 2012, Springer Science + Business Media

    Dr Frédéric Clette

  28. Are the sunspots really vanishing?

    Article • Journal of Space Weather and Space Climate, January 2012, EDP Sciences

    Dr Frédéric Clette

  29. A global small sunspot deficit at the base of the index anomalies of solar cycle 23

    Article • EAS Publications Series, December 2011, EDP Sciences

    Dr Frédéric Clette

  30. Nonlinear solar cycle forecasting: theory and perspectives

    Article • Annales Geophysicae, February 2008, Copernicus GmbH

    Dr Frédéric Clette

  31. From the Wolf number to the International Sunspot Index: 25 years of SIDC

    Article • Advances in Space Research, January 2007, Elsevier

    Dr Frédéric Clette

  32. SWAP onboard PROBA 2, a new EUV imager for solar monitoring

    Article • Advances in Space Research, January 2006, Elsevier

    Dr Frédéric Clette

  33. LYRA, a solar UV radiometer on Proba2

    Article • Advances in Space Research, January 2006, Elsevier

    Dr Frédéric Clette, Eugene Rozanov

  34. Solar activity: nowcasting and forecasting at the SIDC

    Article • Annales Geophysicae, November 2005, Copernicus GmbH

    Dr Frédéric Clette

  35. Solar weather monitoring

    Article • Annales Geophysicae, November 2005, Copernicus GmbH

    Dr Frédéric Clette

  36. Spatial Distribution and North–South Asymmetry of Coronal Bright Points from Mid-1998 to Mid-1999

    Article • Solar Physics, September 2005, Springer Science + Business Media

    Dr Frédéric Clette

  37. Height correction in the measurement of solar differential rotation determined by coronal bright points

    Article • EAS Publications Series, January 2004, EDP Sciences

    Dr Frédéric Clette

  38. Properties of the solar velocity field indicated by motions of coronal bright points

    Article • EAS Publications Series, June 2003, EDP Sciences

    Dr Frédéric Clette

  39. Solar differential rotation determined by tracing coronal bright points in SOHO-EIT images

    Article • EAS Publications Series, August 2002, EDP Sciences

    Dr Frédéric Clette

  40. The solar influences data analysis centre

    Article • Journal of Atmospheric and Solar-Terrestrial Physics, March 2002, Elsevier

    Dr Frédéric Clette

  41. Solar differential rotation determined by tracing coronal bright points in SOHO-EIT images

    Article • EAS Publications Series, July 2001, EDP Sciences

    Dr Frédéric Clette

  42. Active region transient brightenings

    Article • EAS Publications Series, April 2001, EDP Sciences

    Dr Frédéric Clette

  43. Article • Solar Physics, January 2001, Springer Science + Business Media

    Dr Frédéric Clette

  44. <title>Calibration and flight of the NRL EIT CalRoc</title>

    Article • December 2000, SPIE

    Dr Frédéric Clette

  45. Article • Solar Physics, January 2000, Springer Science + Business Media

    Dr Frédéric Clette

  46. <title>In-flight characterization and compensation of the optical properties of the EIT instrument</title>

    Article • October 1999, SPIE

    Dr Frédéric Clette

  47. Article • Solar Physics, January 1999, Springer Science + Business Media

    Dr Frédéric Clette

  48. <title>In-orbit performances of the EIT instrument on board SOHO and intercalibration with the EIT Calroc Sounding Rocket program</title>

    Article • November 1998, SPIE

    Dr Frédéric Clette

  49. Article • Solar Physics, January 1998, Springer Science + Business Media

    Dr Frédéric Clette

  50. <title>In-orbit diagnostics of EIT EUV CCD radiation-induced aging</title>

    Article • October 1997, SPIE

    Dr Frédéric Clette

  51. Association of Extreme-Ultraviolet Imaging Telescope (EIT) Polar Plumes with Mixed-Polarity Magnetic Network

    Article • The Astrophysical Journal, July 1997, American Astronomical Society

    Dr Frédéric Clette

  52. Article • Solar Physics, January 1997, Springer Science + Business Media

    Dr Frédéric Clette

  53. Article • Solar Physics, January 1997, Springer Science + Business Media

    Dr Frédéric Clette

  54. Imaging the solar corona in the EUV

    Article • Advances in Space Research, January 1997, Elsevier

    Dr Frédéric Clette

  55. EIT: Extreme-ultraviolet Imaging Telescope for the SOHO mission

    Article • Solar Physics, December 1995, Springer Science + Business Media

    Dr Frédéric Clette

  56. <title>Calibration of the EIT instrument for the SOHO mission</title>

    Article • October 1995, SPIE

    Dr Frédéric Clette

  57. Plans for a new radioheliograph in Belgium

    Article • Solar Physics, December 1992, Springer Science + Business Media

    Dr Frédéric Clette

  58. Observations of the solar corona in polarized white light during the total solar eclipse of February 16, 1980: Preliminary results

    Article • Solar Physics, July 1985, Springer Science + Business Media

    Dr Frédéric Clette