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Table 1.
Formation heights of the features from the photosphere as described in Bjørgen et al. (2018) based on Bifrost models derived from Carlsson et al. (2016).
| K line | Formation height range | Average formation height | H line | Average formation height below the K line |
|---|---|---|---|---|
| (Mm) | (Mm) | (km) | ||
| K3 | 0.5–4.0 | 1.9 ± 0.6 | H3 | 150 |
| K2V | 0.3–3.0 | 1.3 ± 0.5 | H2V | 150 |
| K2R | 0.3–3.0 | 1.0 ± 0.5 | H2R | 100 |
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