Context: Mean speeds vary greatly, but is typically around 1 m (3 ft) per day. There may be no motion in stagnant areas; for example, in parts of Alaska, trees can establish themselves on surface sediment deposits. In other cases, glaciers can move as fast as 20–30 m (70–100 ft) per day, such as in Greenland's Jakobshavn Isbræ (Greenlandic: Sermeq Kujalleq). Velocity increases with increasing slope, increasing thickness, increasing snowfall, increasing longitudinal confinement, increasing basal temperature, increasing meltwater production and reduced bed hardness.

Question: In what area of Greenland can glaciers move 20-30m per day?
Answer: Jakobshavn Isbræ

Question: Increasing slope, thickness, snowfall, longitudinal confinement, basal temperature, and meltwater production result in increased what?
Answer: Velocity

Question: How far do glaciers generally move per day?
Answer: 1 m (3 ft)

Question: Why are some glaciers stagnant in Alaska?
Answer: trees can establish themselves on surface sediment deposits

Question: What typically moves at around 3 meters a day?
Answer: Unanswerable

Question: What grows on moving glaciers in Alaska?
Answer: Unanswerable

Question: What makes some glaciers stagnant?
Answer: Unanswerable

Question: What causes increased thickness?
Answer: Unanswerable