Here's some information on the Ohio seismic network.  The 3 email
messages are in reverse order.
John
>Date: Thu, 21 Sep 2000 15:08:48 -0600 (MDT)
>From: John Lahr 
>Reply-To: John Lahr 
>Subject: RE: OhioSeis stations
>------------- Begin Forwarded Message -------------
>
>From: "Hansen, Mike" 
>To: "'John Lahr'" 
>Subject: RE: OhioSeis stations
>Date: Thu, 21 Sep 2000 17:05:53 -0400
>
>John,
>         It would be great to send the info to the Public Seismic Network.
>About 2,500 of that cost is for a new Mac and monitor, so one could save a
>lot by picking up  a used one. I have had several hobbyists contact me about
>putting in their own stations. The S102 broadband that we use costs $1,600
>and was developed under Larry Ruff's guidance. We are pleased with the
>performance of this vertical instrument so far.
>
>         We have been working fairly closely with Kaye Shedlock as our
>headquarters station hosts a USNSN station (ACSO) as well. We have worked
>with Bruce Presgrave, who has our codes in the catalog (along with
>coordinates, and such). We did work together on the Ohio earthquake on 7
>Aug. and I sent Bruce our arrival times. We need to set up a better system,
>probably, but we are working on it. We are working on a PC version to view
>our waveforms so one will not need a Mac to see them easily. It will have a
>filter and a picker to pick arrivals, get Lg amplitude/period, etc. All of
>the USGS people have been great to us as we are not seismologists nor are
>any of our station operators. Larry Ruff has been teaching us seismology at
>a rapid rate--which goes to show that old dogs can learn new tricks. Just
>not too quickly.
>         I am open to any suggestions that you may have on data sharing or
>other ideas.
>Best,
>Mike
>Michael C. Hansen, Ph.D.
>Ohio Geological Survey
>4383 Fountain Square Drive
>Columbus, OH 43224-1362
>
>614-265-6580
>614-268-3669 (FAX)
>
>
>
>-----Original Message-----
>From: John Lahr [mailto:lahr@....................
>Sent: Thursday, September 21, 2000 4:36 PM
>To: Mike.Hansen@...............
>Cc: person@......... lahr@.................... buland@........
>Subject: Re: OhioSeis stations
>
>Dear Mike,
>
>Thanks for responding to Ms. Beltz's questions.
>
>Would it be OK if I forward your message to the Public Seismic
>Network email list?  Although $6K is a bit high for most
>amateurs, I think that many would still be interested in
>the way OhioSeis has been implimented.
>.....
>
>Cheers,
>JCLahr
>##################################/ John C. Lahr, PhD
>#################################/ Seismologist
>################################/ U.S. Geological Survey
>###############################/ Geologic Hazards Team, MS966
>##############################/ PO Box 25046
>#############################//##############################
>############################//###############################
>Denver, Colorado 80225-0046 /################################
>      Phone: (303) 273-8596 /#################################
>       Fax: (303) 273-8600 /##################################
>lahr@................... /###################################
>
>
>
>
> > From: "Hansen, Mike" 
> > To: "'ebeltz@.........." 
> > Cc: "'lahr@...................." ,
>"'ruff@.................." 
> > Subject: OhioSeis stations
> > Date: Thu, 21 Sep 2000 15:52:54 -0400
> >
> > Dear Ms. Beltz,
> >       Your note to John Lahr of USGS has been ccd to me. We have a very
> > new, active, and inexpensive program to monitor seismic activity in Ohio.
> > This concept, components, and software were developed by Dr. Ruff at the
> > Univ. of Michigan. I suggest that you go to our website
> > (http://www.dnr.state.oh.us/odnr/geo_survey/), then click publications,
>then
> > Ohio Geology, then current issue: no. 1, 2000. That will lead you to an
> > extensive article on the Ohio Seismic Network. You will see other links on
> > the site to other earthquake-related articles. Larry Ruff's MichSeis
>website
> > (http://www.geo.lsa.umich.edu/MichSeis/index.html) gives a lot of
> > information on the equipment and software and has interpreted seismograms
> > from OhioSeis stations.
> >       The entire system, including Macintosh computer, costs a bit under
> > $6,000. It uses a broadband seismometer which is  superior to many older
> > instruments. We record any earthquake in the world that is 6.0 magnitude
>or
> > above and many distant ones that are in the 5.0 range. We pick up Illinois
> > events that are in the 3 mag. range. The system is fairly easy to set up
>and
> > operate and does not require much maintenance.
> >       Currently, the software will run only on the 8 series Mac operating
> > system. The new Mac G4s have OS 9.0. Therefore, you would have to locate a
> > Mac G3 or G4 with 8.5 or 8.6. The iMac computers will not work because
>they
> > do not have an internal slot for the digitizing board. We use Garmin GPS
> > receivers for time.
> >       Our first real test of the system was last month when we had a 3.0
> > mbLg earthquake in Alliance, OH. We were able to locate it within a 4x5 km
> > error ellipse using OhioSeis stations and were pleased with our system
> > performance. You can click on that link on our web site and see the
>results.
> >       All of our stations are continuously connected to the Internet so
> > that we can access data at any time. You would not have to do this, but it
> > is a wonderful way to share data. You would need a network connection to a
> > T-1 line for this. We could provide an equipment list with suppliers and
> > costs.
> >
> >       That is a brief overview of our system. If you have any questions,
> > please feel free to call or email. You can go to our index page and link
>to
> > any of our stations at the URL: http://198.234.183.15 . If you have a Mac
> > available, go to Larry Ruff's website and download the 2000.1 version of
>his
> > program, SeismoView, and then you can view any of our seismograms.
> > Sincerely,
> > Mike Hansen
> >
> > Michael C. Hansen, Ph.D.
> > Ohio Geological Survey
> > 4383 Fountain Square Drive
> > Columbus, OH 43224-1362
> >
> > 614-265-6580
> > 614-268-3669 (FAX)
> > 
> >
>
>------------- End Forwarded Message -------------

* John C. and Jan H. Lahr
*JohnJan@........
* 1925 Foothills Road
* Golden, Colorado 80401-1718
* (303) 215-9913
* http://lahr.org/john-jan

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