Tag Archives: ring-diagram analysis

235. Correlations with Magnetic Activity in the Solar Near-Surface Shear Layer. II. Radial Shear

Contributed by M. Cristina Rabello Soares. Posted on October 1, 2026

Ring-diagram helioseismic analysis reveals that the Sun’s strongest near-surface rotational shear strengthens, shifts upward, and narrows as magnetic activity increases, suggesting a connection with evolving subsurface toroidal magnetic fields.

133. Hemispherical Asymmetry in the Solar Meridional Flow

Contributed by B. Lekshmi. Posted on October 28, 2019

Subsurface meridional flows from ring-diagram analysis showed a clear hemispheric asymmetry in last 18 years. Interestingly, this flow asymmetry leads the magnetic flux and sunspot number asymmetry by 3.1 – 3.6 years.

104. Analysis of the Effects of Sunspots in Their Quiet Surroundings

Contributed by M. Cristina Rabello-Soares. Posted on June 30, 2018

Ring-diagram analysis is applied on the HMI-observed sunspots of about 3 years. The attenuation of wave amplitudes near sunspots, rotational speed of sunspots, and subsurface flows around sunspots are discussed.