Over and over, I have read that normally a seismometer is sited for N-S, 
E-W, and Vertical sensing.

However, I just read a paragraph in An Introduction to Seismology, 
Earthquakes and Earth Structure about a seismometer in Hawaii that "was 
oriented to receive S phase signals."  How is that accomplished?

I could venture a guess, but probably would be wrong.

Thanks,.
Jerry Payton 







Over and over, I have read that normally a seismometer is sited for =
N-S,=20
E-W, and Vertical sensing.  
 
However, I just read a paragraph in An Introduction to =
Seismology,=20
Earthquakes and Earth Structure about a seismometer in Hawaii that =
"was=20
oriented to receive S phase signals."  How is that =
accomplished? =20

 
I could venture a guess, but probably would be wrong.
 
Thanks,.
Jerry Payton