| Term: | Tongue activity |
| Definition: | Uncertain: unknown or not measured; Marked retreat: more than 20 m per year retreat; Slight retreat: 20m per year retreat; Stationary: Stationary; Slight advance: 20m per year advance; Marked advance: more than 20m per year advancing; Possible surge: possible surge; Known surge: known surge; Oscillating: oscillating; Downwasting: stationary but rapidly losing mass through melting. |