IHOP 266 observations of coronal hole boundar plume on 17-Oct-2017


There was a low-latitude extension to the north coronal hole, and this sequence was right at the boundary. The AIA movies below show a weak plume in 171 (note how the hotter plumes around it are better seen in 193). There's a little bright point at the base of the plume and this is actually caught with the EIS slit.


AIA 171 and 193 movies at 5 minute cadence with EIS slit over-plotted. Logarithmic intensity scaling.

The images below are EIS time series images in He II 256 (left) and Fe XII 195 (right) from the raster beginning at 11:03 UT. The short-lived brightenings at Y=290 correspond to the bright point. This activity continues for the complete EIS sequence.

EIS observations

EIS ran three Cool_loop_stare rasters consecutively from 11:03 to 13:56 UT.

SOT data

SP ran a 27"x61" raster repeatedly with full resolution between 10:31 and 16:30 UT.

IRIS observations

IRIS ran a 96-step dense raster 57 times during 10:20 to 18:10 UT.


Page maintained by Dr Peter R Young.