Forum Moderators: martinibuster
You're saying "yesterday was also a lot lower," does that mean that your "shock" was caused by today's stats, i.e. stats of a day that has not past fully yet? Only stats of completed days are representative, so there's no need to panic when at 2 in the afternoon your stats aren't what you think they should be.
I didn't check my eCPM yesterday, but today it (yesterday's eCPM) looks normal. Today's is looking a little better than usual, but that's meaningless at 7:15 a.m. Google time.
If someone had told me I would be making less than a year ago with almost double traffic I would scarcely have believed them. But alas it's true. Depressing.
Is this double the traffic according to AdSense or your server logs?
The decline can be from a variety of different reasons ranging anywhere from changes in supply and demand in the advertising channel, seasonal or economic downturns, to something as simple as the quality of the traffic you're bringing in causing smart pricing to kick in.
I think I'd do some research because some of those issues can be corrected.