Frequency of electricity outages

[TomK]

There's been a definite and quite dramatic increase in power outages and "glitches" in the last few years - the observatories on Mauna Kea have been logging them. Before around 2010, we used to experience about two significant power outages per year that affected telescope operations. The rise since then has been exponential. We now get several dozens a year. I have a plot which shows this dramatic increase although it's a few years old now. I'll try and make it available in the next few days.