Sunspot #2644 has rotated around to the far side of the sun. Perhaps it will return around April 17 or 18.
Sunspot #2645 is traveling to the far side of the sun as I type this.
Below is the latest three day plot showing the B and C flares mostly emitted by #2645 with some from #2648.
This plot almost looks like a foreign language written in script. Do not be concerned about the vertical down strokes as these are probably satellite down times.
This is the NOAA explanation: See Details (bottom of page) at http://www.swpc.noaa.gov/products/goes-x-ray-flux
The GOES X-ray flux 6-hour and three-day plots contain 1 and 5 minute averages, respectively, of solar X-rays in the 1-8 Angstrom (0.1-0.8 nm) and 0.5-4.0 Angstrom (0.05-0.4 nm) passbands. Data from the SWPC Primary GOES X-ray satellite is shown. Some data dropouts occur during satellite eclipses when the moon or Earth comes between the satellite and the sun, especially during the spring and fall. The Eclipse season lasts for about 45 to 60 days and ranges from minutes to just over an hour. The plots on this page update dynamically every minute.