General Weather/Earth Sciences Topics > Earth Sciences

Seismographs and thunder

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DaleReid:
Chief-David:
Well, add football games to the record, I guess.  As they say in Central Wisconsin, Who woulda thunk it?

Where was the graph taken from?  I see it was an NFL game.

Having been in Camp Randall stadium during a full house home game of the Badgers Football, when the student section begins to get limbered up a bit and dancing in their end of the stadium to the song "Jump" which they are all excited to do, I can recall feeling the other end and sides of the stadium shake.  (The Engineering Dept has done extensive analysis (someone's Masters?)  to show that the structure is in no danger.... yet.)

Anyway, I'm not talking ordinary thunder, although that can be quite forceful.  I'm thinking of the maybe once a year or every couple years storm (that I am present to experience) in which a long rolling thunder causes the house to shake.  It must have traveled many miles to get to my house since often the storm seems to have passes and is subsiding, with the quiver of the house going on for a few seconds to as long as 5 or 6 seconds. 

I know Edward Teller watching his University's seismograph to see that the Teller-Ulam idea  worked to fire the first real fusion device.  But then that was a big thump in its own right.

I will check to see if there are sources at Morris to see if they have an idle student or teaching assistant who might be able to discuss it further.

Thanks.  Dale

DaleReid:
Kevin and Chief-David:

You guys bring to mind the old phrase:  "So many things to do, and so little time."  I'm off to look at that, too, I guess just so I know what is out there.  A few years ago there was an article in the SciAmerican Amateur Scientist section when it was resurrected for a bit saying that the new accelerator chips were so sensitive that a relatively easy to assemble at-home device could be made.  I have the article here somewhere, but never got around to doing more than reading it.  Now I understand that many cellular phones/smart phone have acceleromeeter chips in them, too.  Maybe there is an 'app' for zip tying your cell phone to a metal pole set deep in bedrock and sit back to watch the display? 

zoomx:
Most homemade seismometer measures ground movements (ground velocity), small ground movements and usually they are more sensible to its own resonance frequency. You can have such small movements form many other sources other than an earthquake so usually seismometers are far from these noise sources.
Professional seismometer now are different, they have a mass but this mass is steady and the electronic measure the energy to put this mass steady. This way they detect waves in a large band.


--- Quote from: DaleReid on March 07, 2021, 12:04:35 PM --- new accelerator chips were so sensitive that a relatively easy to assemble at-home device could be made.  I have the article here somewhere, but never got around to doing more than reading it.  Now I understand that many cellular phones/smart phone have acceleromeeter chips in them, too.  Maybe there is an 'app' for zip tying your cell phone to a metal pole set deep in bedrock and sit back to watch the display? 

--- End quote ---
You are talking about MEMS accelerometers. Unfortunately most of them are not so sensible, sensible ones are very expensive and are not so small. Anyway there are apps to record the signal of smartphone accelerometers.

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