143. The New HMI 96-Minute Vector Magnetograms
New HMI 96-minute vector magnetograms are now available. Deep averaging reduces noise and enhances long-lived magnetic structures.
Monthly Archives: June 2020
142. On the Lorentz Force and Torque of Solar Photospheric Emerging Magnetic Fields
A large sample statistical study of normalized Lorentz force and torques in emerging magnetic field shows that the photospheric magnetic field has a rather small Lorentz forces and torques, close to a force-free state.
141. Source Depth of Three-minute Umbral Oscillations
Apparent 3-min waves observed inside sunspot umbrae are modeled as excited about 1000 to 2000 km beneath sunspots’ surface.