HAO Research Highlights

HD30495 Figure 1
December 3, 2015

What might happen to the well-known 11-year solar cycle if the Sun were spun up to rotate more than two times faster? To investigate such questions of the dependence of the Sun's internal dynamo on parameters such as rotation we must look to other stars with different physical conditions.

Image Credit: K.L. Turnbull, J.A. Wild (Lancaster University) and the SOHO/EIT consortium, Shutterstock
December 1, 2015

In a recent AGU editor's Vox Discussion, Delores Knipp explores the societal impacts of geomagnetically induced currents (GICs). GICs can cause voltage swings, transformer heating, and reactive power loss in high-voltage power transmission systems.

Kalman filtering image
February 11, 2015

Approximating a model’s “true” state by applying Kalman filtering to solar cycles, a technique first developed in the 1950s and 1960s to help Apollo 11 settle safely on the Moon.

Stackplot of solar-terrestrial data image
February 11, 2015

Recent work on historical recurrent geomagnetic activity and the peculiarity of the recent solar-cycle minimum, was chosen by the editors of AGU journals for special highlight.

September 5, 2014

New observational work provides more information about the evolution of the Sun's interior and origins of its enigmatic 11(-ish) solar cycle. The research potentially opens the door to improved forecasting of decadal-scale solar variability.