Observations

Figure 1. Coronal loops seen in 284 Å emissions, produced by Fe XV, sprouting out of what is sometimes called "solar moss" (i.e., the irregular surface of the Sun seen in iron emissions). Note that in single-frequency imagery, brightness doesn't mean temperature, but rather, just ion density.

 

• most visible in Fe IX/X/XV emissions
• oriented along magnetic field lines
• current density: 1~3 A/m²