Airlock Activity

[DamageCT]

Just as the title says, I'm still seeing airlock activity in a very light cream ale (was about 1.048SG on brew day) the odd thing is this Sunday would be four weeks since I brewed it, I've never seen this much airlock activity in any other brew after about a week max, do you think it could still be fermenting? Or perhaps just expelling co2 that was trapped from the fermentation?

 

[JonM]

Temp change, change in barometric pressure, CO2 off gassing (especially if you move it) - all can cause bubbling.

 

[DamageCT]

I haven't moved it, it is in my basement which was about 64 degrees average for the first two-weeks and is now at about 66 average (I don't tend to temp control my ales, just lagers, unless it needs to be an oddly hot fermented ale)

I guess the change from cold winter air to spring air may have changed the pressure though...

Maybe I'll just take a reading and see if it's keg ready yet