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The Interface Region Imaging Spectrograph (IRIS) mission provideshigh-resolution observations of the chromosphere and transition region. We tryto determine whether the light walls exist somewhere else in active regionsbesides light bridges. Employing half-year high tempo-spatial data from theIRIS, we find lots of light walls either around sunspots or above lightbridges. For the first time, we report one light wall near an umbral-penumbralboundary and another along a neutral line between two small sunspots. These newobservations reveal that these light walls are multi-layer and multi-thermalstructures which occur along magnetic neutral lines in active regions.

Light Walls Around Sunspots Observed by the Interface Region Imaging Spectrograph