PSN-L Email List Message

Subject: Re: Submitting PSN data to NEIC
From: Edward Cranswick
Date: Sun, 20 Jun 1999 21:47:25 -0600


Karl-
    Thank you for your comments. I think it is important that we, the PSN, try to
make as good impression as possible with useful and reliable data.
-Edward

Karl Cunningham wrote:

> Edward --
>
> Thank you so much for your efforts in coordinating arrival-time data
> submission from PSN stations to the NEIC.  I'm sure this will help us feel
> like a worthwhile contribution is coming from our hard work in developing
> our own systems.  And for those of us who occasionally need it, a bit more
> justification in spending so much time on our stations.
>
> When you say significant earthquakes, could you give us some guidelines?  I
> understand the need for additional data in areas where station coverage is
> sparse and that, in general, the more data the better.  I do want to make a
> significant contribution, but don't want to unnecessarily clutter up the
> NEIC's computers.
>
> Something each of us should consider in this endeavor is time skew due to
> filtering.  Most of the time analog filtering is applied to a signal, the
> resulting waveform is skewed in time, either ahead or behind.  SDR has
> provision compensate for this by specifying a time offset for each channel,
> but this should be calibrated if the data is to remain accurate to 0.1s.
>
> Karl Cunningham
> La Mesa, CA.
> PSN station #40
> karlc@.......
>
> At 11:58 PM 6/17/99 -0600, you wrote:
> >PSN members-
> >
> >One of the activities included in the 2nd Spring Colorado Public Seismic
> >Network (PSN) Meeting at the USGS Golden, Colorado, on Friday 21 May was a
> >tour of the National Earthquake Information Center (NEIC) conducted by the
> >NEIC Director, Waverly Person. During the the tour, in response to a request
> >relayed from Wayne Abraham of the Dominica PSN, Waverly said that the NEIC
> >would welcome reliable P-wave picks (arrival times) of significant
> >earthquakes from established PSN stations, e.g., see
> >.
>
> _____________________________________________________________________
>
> Public Seismic Network Mailing List (PSN-L)
>
> To leave this list email listserver@.............. with the body of the
> message: leave PSN-L

--
Edward Cranswick                Tel: 303-273-8609
US Geological Survey, MS 966    Fax: 303-273-8600
PO Box 25046, Federal Center    cranswick@........
Denver, CO 80225-0046  USA      E.M. Forster said, "Only connect".




_____________________________________________________________________

Public Seismic Network Mailing List (PSN-L)


[ Top ] [ Back ] [ Home Page ]

Larry Cochrane <cochrane@..............>