Since things are quiet on the network lately and even Geoff has 
commented on this subject in the past, I'd like to return to this 
issue......on Steve Jones' Facebook page, 
http://alabamaquake.com/reports.html#Tornado_Seismic_Signature a couple 
of paragraphs on the above issue surfaced lately. (_Tornado Detection 
Based on __
__Seismic Signal," Tatom/Knupp/Vitton; 18 July 1994_) I replied to his 
post with this:


I got strongly criticized by the Paducah regional weather people and
pulled back after the initial discussion on PSN network. But, I have
spent many hours studying weather and what I see on the seismic
equipment.  I learned to recognize the signatures of strong storms off
the coast of Alaska, Great Lakes, east coast and off the SE coast of
Greenland....even hurricanes in the Gulf. This is what I know. The Ohio
group that suggested a peak around .15 to .25 Hz were seeing Great Lakes
waves/wind....not a tornado. I have learned  what to expect on the N-S
or E-W Lehman.

Frank Tatom called the US array system to my attention. I examined the
Harrisburg, ILL tornado data and felt it was too short of a path. I also
did extensive study on the Henryville, IN  tornado which actually went
over into Kentucky. I felt that the hilly terrain confuses the issue....
it is still too early, we are still doing preliminary
study/investigation work.  I also used the USArray to look at the
Oakland City, IN macroburst.

I honestly can't say I can put my finger on a specific frequency that
fits all these situations. IU claimed they saw something in the
Harrisburg data (which I believe), but it was more likely the collapse
of the storm cell .... something like I saw on the Oakland City, IN
macroburst.

Tatom and Vitton were looking for a specific frequency; something that a
detector could easily recognize. I really believe it exists. Personally
I suspect it to be higher than .2 Hz. I spent time interviewing people
who experienced the tornado I brought to the PSN network for discussion.
I did the same in conjunction with the Branson, MO tornado as well as
Joplin, MO. If those who experienced these tornadoes say anything about
hearing the tornado, they all agree it sounded somewhat like a train.
Wind by itself creates sound too....ever hear the upstairs wind howl?
Even earthquakes can emit "sound", don't you agree? Logically, this common
thread of "sound" must be a clue to either higher or lower creator of
the "sound" exists BUT NOT this .2 Hz. What we hear may even be
harmonics of the original frequency.

This last two sentences have haunted me all night. Sound is a common 
denominator. Have I missed something? Where do we look?

  

    
  
  
    Since things are quiet on the network lately and even Geoff has
    commented on this subject in the past, I'd like to return to this
    issue......on Steve Jones' Facebook page, http://alabamaquake.com/reports.html#Tornado_Seismic_Signature
    a couple of paragraphs on the above issue surfaced lately. (Tornado
        Detection Based on 

      Seismic Signal,” Tatom/Knupp/Vitton; 18 July 1994)  I
    replied to his post with this:

    

    

    
I got strongly criticized by the Paducah regional weather people and 
pulled back after the initial discussion on PSN network. But, I have 
spent many hours studying weather and what I see on the seismic 
equipment.  I learned to recognize the signatures of strong storms off 
the coast of Alaska, Great Lakes, east coast and off the SE coast of 
Greenland....even hurricanes in the Gulf. This is what I know. The Ohio 
group that suggested a peak around .15 to .25 Hz were seeing Great Lakes 
waves/wind....not a tornado. I have learned  what to expect on the N-S 
or E-W Lehman.

Frank Tatom called the US array system to my attention. I examined the 
Harrisburg, ILL tornado data and felt it was too short of a path. I also 
did extensive study on the Henryville, IN  tornado which actually went 
over into Kentucky. I felt that the hilly terrain confuses the issue.... 
it is still too early, we are still doing preliminary 
study/investigation work.  I also used the USArray to look at the 
Oakland City, IN macroburst.

I honestly can't say I can put my finger on a specific frequency that 
fits all these situations. IU claimed they saw something in the 
Harrisburg data (which I believe), but it was more likely the collapse 
of the storm cell .... something like I saw on the Oakland City, IN 
macroburst.

Tatom and Vitton were looking for a specific frequency; something that a 
detector could easily recognize. I really believe it exists. Personally 
I suspect it to be higher than .2 Hz. I spent time interviewing people 
who experienced the tornado I brought to the PSN network for discussion. 
I did the same in conjunction with the Branson, MO tornado as well as 
Joplin, MO. If those who experienced these tornadoes say anything about 
hearing the tornado, they all agree it sounded somewhat like a train. 
Wind by itself creates sound too....ever hear the upstairs wind howl?  
Even earthquakes can emit "sound", don't you agree? Logically, this common 
thread of "sound" must be a clue to either higher or lower creator of 
the "sound" exists BUT NOT this .2 Hz. What we hear may even be 
harmonics of the original frequency.
    This last two sentences have haunted me all night. Sound is a common
    denominator. Have I missed something? Where do we look?