Thanks, I was wondering how we could look at the seismograms after they 
roll off the 24 hour web sites,,   the 24 hour seismgrams were the ones 
I used to see where the event was recorded, the relative magnitude and 
timing, and come up with my wild speculation, ha!  
  Stephen

Bob Hancock wrote:
>    Stephen -
>
> GOOD QUESTION !!!  On September 11, there was a seismic event in 
> Eastern AZ, that prompted telephone calls to the University of 
> Arizona, and was recorded by several stations including Tucson, AZ 
> Albuquerque, NM and several Transportable Array (TA) stations in 
> between.  It was not listed on the USGS web site.  I have seen several 
> events over the past few years where I have recorded something, 
> usually surface waves with indistinct body waves, and they were not 
> listed.
>
> There is a distinct lack of seismometers south of our border.  There 
> is new station coming on line in a few months at the tip of Baja 
> California, Mexico, and another in the Yucatan.  Other than that you 
> have to stick to the southern US, Puerto Rico, or South America, and 
> South America is very thin.  I don't know why some events are not 
> listed, but it may have to do with the lack of sufficient stations for 
> good determination of all their required data.
>
> If you want to see where all the seismometers in the world are 
> located, I would suggest that you go to the IRIS web site 
>    http://dmc.iris.washington.edu/     and select software.  Scroll 
> down and download the GEE program.  It will run on both a MAC and an a 
> PC.  When you run the program, you can see where the stations are. 
>  Its a fun program to play with and has many nice capabilities.  If 
> you want you can download event data from several stations through 
> IRIS, and view the SAC files using GEE.  I have read in and viewed 
> over 20 stations more than once.  Its a nice way to start looking at 
> comparing stations and how they record events.  WinQuake will also 
> read SAC files, but it does not read all the header and you many need 
> to manually reload the event data to get all the functions of 
> "WinQuake to work properly.
>
> You can download events through Wilber II, another nice feature 
> available through IRIS.  Take a look at their web site, they have a 
> lot to offer.
>
> Another program to consider downloading would be VASE.  It allows you 
> to specify a station, and a block of time to download data.  These 
> files have station data, but don't have event data.   However, they 
> can still be read by WinQuake.
>
> Bob Hancock
>
>



  


Thanks, I was wondering how we could look at the
seismograms after they roll off the 24 hour web sites,,   the 24 hour
seismgrams were the ones I used to see where the event was recorded,
the relative magnitude and timing, and come up with my wild
speculation, ha!   

  Stephen



Bob Hancock wrote:

  
  
   Stephen -

  

GOOD QUESTION !!!  On September 11, there was a seismic event in
Eastern AZ, that prompted telephone calls to the University of Arizona,
and was recorded by several stations including Tucson, AZ Albuquerque,
NM and several Transportable Array (TA) stations in between.  It was
not listed on the USGS web site.  I have seen several events over the
past few years where I have recorded something, usually surface waves
with indistinct body waves, and they were not listed.

  

There is a distinct lack of seismometers south of our border.  There is
new station coming on line in a few months at the tip of Baja
California, Mexico, and another in the Yucatan.  Other than that you
have to stick to the southern US, Puerto Rico, or South America, and
South America is very thin.  I don’t know why some events are not
listed, but it may have to do with the lack of sufficient stations for
good determination of all their required data.

  

If you want to see where all the seismometers in the world are located,
I would suggest that you go to the IRIS web site    http://dmc.iris.washington.edu/
    and select software.  Scroll down and download the GEE program.  It
will run on both a MAC and an a PC.  When you run the program, you can
see where the stations are.  Its a fun program to play with and has
many nice capabilities.  If you want you can download event data from
several stations through IRIS, and view the SAC files using GEE.  I
have read in and viewed over 20 stations more than once.  Its a nice
way to start looking at comparing stations and how they record events.
 WinQuake will also read SAC files, but it does not read all the header
and you many need to manually reload the event data to get all the
functions of “WinQuake to work properly.

  

You can download events through Wilber II, another nice feature
available through IRIS.  Take a look at their web site, they have a lot
to offer.

  

Another program to consider downloading would be VASE.  It allows you
to specify a station, and a block of time to download data.  These
files have station data, but don’t have event data.   However, they can
still be read by WinQuake.

  

Bob Hancock