As promised, and with permission of my good friend Gary, here is Dr. Jake Lowenstern's explaination of the "pipecleaner/caterpillers".
"Mr. Lowenstern,
LKWY has been showing a "pipe cleaner" indication recently (again). I did not ask about it before because I thought it an anomaly. It is on the
seismograph again so I must ask about it.
Could these indications be caused by a CAM station, or possibly a building nearby? Maybe it is the monitor itself. Like a fried component?
It is very unusual to me and I am very curious to know what might be causing these "caterpillar" or "pipe cleaner" indications on the graph. They
do vary in amplitude, or intensity somewhat.
I have read an opinion that it may be water leaking from the lake. I suspect it is more likely something else. Please say it is unknown. That would
make life interesting.
Thanks,
Gary"
"Dear Gary,
LKWY is a USGS station, part of the USNSN operated by the Earthquake folks out of Denver. It is located in a maintenance area where there is
electricity to power this power-hungry station (it transmits via a satellite dish instead of a radio and thus requires more power). There is a nearby
IMPROVE station that measures air quality. A couple years ago we had a problem with a pump in that station that was far more annoying. You can see it
on the Jan 24, 2007 LKWY webicorder trace. Turns out the pump was loose from its moorings and was vibrating against the wall. The problem only
occurred every third day, but generated a lot of noise. We ended up contacting the contractor that operates the air quality station for the NPS. They
were out of Fort Collins, CO. The next time they visited the park they found the defective pump and our problem went away.
This one is quite different. The USGS technician thinks it's probably a heater or an AC unit (yes, I'm not sure either why an AC unit would be on
right now). The NPS sent a maintenance guy out to see if it might be something obvious, but he couldn't sleuth it out. Others have come up with ideas
for other possible interferences. Basically, it doesn't significantly effect the ability of the station to locate earthquakes, and it's clearly a
non-natural signal, so it's not worth spending money to fix at this point. Next time a USGS or UU technician heads to the park, they can try and
figure it out. A special trip would cost a lot of money for a small problem that might not get fixed, especially since we don't have keys to all the
various sheds that might harbor the offending equipment. It is also possible that the faulty component is within LKWY itself. We'll track it down,
but you may just have to live with the problem for another few months.
So yes, the problem is unknown. I'm not sure that makes it REALLY interesting, but perhaps more interesting than if we knew exactly what was causing
it. And no, I don't think the "gurgling bathtub drain" hypothesis holds much water (pun intended)."
Did you love the dig at me in the end? Of course it's deserved, I was the one out here spouting all kinds of ideas. And on You Tube. At this point
I'm disagreeing with whatever positon I take at the moment. When I think it's a pump. I then convince myself it isn't. And then I find
inconsistencies in evidence given by the rep who claimed the signatures appeared last winter. I don't what the hell to think. My best guess is that
it is a fried component. They had a technician down listening and they didn't hear anything loud enough or obvious enought to solve the mystery.
Someone awhile back asked if this was all relevent. It must be. "Others have come up ideas for possible interferences." Maybe they're cheating and
listening to your stuff to get an lead. It's relevent enough that they're discussioning it, should why shouldn't we.
Top Secret Geyser? It's not secret, if it happens I can show you precisely where it is.
www.youtube.com...
What is causing the "pipecleaner/caterpillers"? No one knows.