My horizontal sensors respond to tilts caused by moving around in the rooms
above. I believe the wiggle prior to the P-wave is such an artifact.

Bob from Locust Valley

On Mon, Jul 5, 2010 at 9:56 AM, Thomas Dick wrote:
It has been very quiet here in southern Indiana for about four days. When I
saw the USGS list of quakes yesterday, I thought I would see a good record.
I worked it up and was disappointed so I didn't post it until today after I
saw Bob's (Locust Valley). If you look prior to the arrival of the P wave,
there is something there in the frequency of .05 hz (in the one min 40 sec
prior to P arrival for Honshu) that appears directional. (e.g. the peak is
greater on the E-W than on the N-S and is NOT present on the vertical). The
Texas posts show a peak on the vertical too. Since this peak is not
synchonous with the S wave arrival from Honshu, is it wish to suppose this
is another quake since the Texas stations show a peak on the vertical and
probably are closer to it?
My horizontal sensors respond to tilts caused by moving around in the 
rooms above. I believe the wiggle prior to the P-wave is such an 
artifact.

Bob from Locust Valley

On
 Mon, Jul 5, 2010 at 9:56 AM, Thomas Dick <dickthomas01@.............>
 wrote:

It has 
been very quiet here in southern Indiana for about four days. When I saw
 the USGS list of quakes yesterday, I thought I would see a good record.
 I worked it up and was disappointed so I didn't post it until today 
after I saw Bob's (Locust Valley). If you look prior to the arrival of 
the P wave, there is something there in the frequency of .05 hz (in the 
one min 40 sec prior to P arrival for Honshu) that appears directional. 
(e.g. the peak is greater on the E-W than on the N-S and is NOT present 
on the vertical). The Texas posts show a peak on the vertical too. Since
 this peak is not synchonous with the S wave arrival from Honshu, is it 
wish to suppose this is another quake since the Texas stations show a 
peak on the vertical and probably are closer to it?