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How unprecedented a solar minimum was it?

C T Russell1, L K Jian1, J G Luhmann2

  • 1Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, USA.

Journal of Advanced Research
|February 17, 2015
PubMed
Summary
This summary is machine-generated.

The Sun is exhibiting unusual behavior, with a delayed solar cycle and weaker activity. This study updates solar activity records and analyzes its effects on space weather, noting continued solar anomalies.

Keywords:
Solar magnetic fieldSolar minimumSolar windSunspots

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Area of Science:

  • * Solar Physics
  • * Space Weather
  • * Heliophysics

Background:

  • * The end of the last solar cycle was significantly delayed.
  • * The current solar cycle has shown weaker activity than expected.
  • * Auroras have been observed more frequently in unusual locations, indicating solar activity.

Purpose of the Study:

  • * To provide an updated review of solar activity records.
  • * To analyze the effects of solar activity on interplanetary fields and solar wind density.
  • * To assess the Sun's behavior in comparison to previous solar minima.

Main Methods:

  • * Updating records of solar activity.
  • * Analyzing solar wind density and interplanetary fields.
  • * Employing two techniques to predict sunspot maximum from solar minimum readings.

Main Results:

  • * Solar activity remains anomalous compared to historical solar minima.
  • * The current solar cycle's rising phase has exhibited predominantly weaker activity.
  • * Data analysis confirms the Sun's continued unusual behavior beyond the minimum phase.

Conclusions:

  • * The Sun's current behavior deviates significantly from patterns observed in previous solar minima.
  • * Continued monitoring and analysis are necessary to understand these solar anomalies.
  • * The observed phenomena suggest a departure from established solar cycle norms.