A borehole seismometer called "B944", located near the West Thumb region of the Park, has been malfunctioning in recent weeks with strong bursts of electronic noise contaminating its data.
"These noise bursts appear as wild excursions on the B944 webicorders that can appear alarming to the inexperienced eye," said the USGS.

LOL - in recent weeks!?!

So why nobody did repair it until now, or turned it off?!