An update to alog 50841. 

Glitch DB now has Hanford data up to the end of July 2019. Instead of the ~200 events we were looking at previously, there is now data from over 1000 blip glitches from O3.

The median peak frequency has definitely dropped between runs, as seen in figures 1 and 2. However, there is a clear bimodality, with a large population in the most common peak frequency bin from O2. In addition, a higher proportion of events occupy the high-peak frequency tail of the distribution.

The medium minimum frequency has dropped by ~15 Hz, as shown in figures 3 and 4.

The quality factor, time between blip glitches and SNR have not changed appreciably, but it seems as if the distribution of the duration of glitches falls off slower in O3 than in O2, as shown in figures 5 and 6.