PSN-L Email List Message

Subject: Re: Help me LEARN
From: "GPayton" gpayton@.............
Date: Fri, 26 Feb 2010 12:21:17 -0600


Ahaaaa!  I was not aware of that choice on the TABLE tab.  That corrected my 
error!

I truly appreciate your individual help and any others that may respond. 
Unfortunately, people like myself without formal background or training have 
to scratch to find answers; the results of some of which may be correct. 
The usage of WinQuake and WinSDR are thus difficult.  The HELP supplies some 
information, some dated, but the WHY is not always answered.  Perhaps I 
expect too much.  I just want to learn and know as much as I can absorb. 
Unfortunately, at my age I don't retain as much as years ago! (smile)

Regards,
Jerry
  ----- Original Message ----- 
  From: Stephen Hammond
  To: psn-l@..............
  Sent: Friday, February 26, 2010 11:48 AM
  Subject: RE: Help me LEARN


  Hi Jerry, There is no such thing as a dumb question and it is OK to make
  mistakes. This list has always supported learning and that was one of the
  main purposes we developed the original BBS and Larry creating the first
  Website.

  I have a question. It may sound basic but it's just a thought. You don't
  record many local events I take it. Which table are you using to calc the
  P&S waves in Winquake? Open Winquake click on table and select the radial
  button "regional" in the lower right of the popup. As for the amount of 
data
  to cut. Check the PSN Redwood City website (Larry's) and look at the event
  files. Locate 100223.200336.ate That should give you an idea of the amount
  of data to save for a local event. The rule of thumb is you want to 
provide
  enough data so the background noise level can be established before the
  event occurred. On the backend of the event you don't want to chop off any
  seismic waves. For a local event start to end of the event is about 1.5 
min.
  Winquake default is to trap 3 min. Poor ratings: The ratings are based on
  the data at the sites used for analysis. Your data may also be poor or it
  could be good. It depends on your location in relation to the epicenter 
and
  the direction of the energy and the instruments orientation N/S -- E/W --  
Z
  in relationship to the event. I live near the San Andreas fault zone and
  there are times when the data is poor for many local on smaller events. 
Many
  times the assessment rating is an arbitrary judgment scale based on the
  assessment of the seismologist that reviewed the event file. UPLOAD DATA: 
I
  took a look at the PSN event files for this event and I only see two event
  files from JP3 and HZ3 in Texas. Have you posted any data to the event
  files?

  Regards, Steve Hammond
  PSN San Jose, Aptos, CA



  -----Original Message-----
  From: psn-l-request@.............. [mailto:psn-l-request@............... 
On
  Behalf Of Thomas Dick
  Sent: Friday, February 26, 2010 7:54 AM
  To: psn-l@..............
  Subject: Re: Help me LEARN

  GPayton wrote:
  > After reading many posts on the PSN Net, it is obvious that I know
  > very little as compared to MANY of you out there.   I am often
  > embarrassed to ask a question and turn to the books to try to resolve
  > my question(s).  Even at that, many time I fall short.
  >
  > So!  Question:
  >
  >     1)    Today's trace of the 3.1 event in Oklahoma  displays
  > in WinQuake that both the *Pb* & *Sb* were seconds *_BEFORE_* the *P*
  > & *S* times.  To me, that seems like I get a bouncing ball BEFORE I
  > actually drop it!  What did I do wrong?  Is this a matter of the
  > "tables" being off?  Or, am I wrong in assuming it is incorrect?
  >
  >     2)    Another "pause" that I have when using WinQuake of any event
  > is HOW LONG to plot it.  Obviously, a local event would be short, a
  > regional would be a little longer and a teleseismic may be over an
  > hour.  But, I was wondering IF there was a rule-of-thumb time that you
  > experienced people use?
  >
  > Thanks & Best regards,
  > Jerry
  According to the St. Louis network
  > _http://folkworm.ceri.memphis.edu/recenteqs/Quakes/quakes0.html_
  , this quake was not a good one ... they rated it as poor. I have
  followed their analysis faithfully and such a rate makes for some poor
  readings of the incoming times of wave types.
  __________________________________________________________

  Public Seismic Network Mailing List (PSN-L)

  To leave this list email PSN-L-REQUEST@.............. with
  the body of the message (first line only): unsubscribe
  See http://www.seismicnet.com/maillist.html for more information.

  __________________________________________________________

  Public Seismic Network Mailing List (PSN-L)

  To leave this list email PSN-L-REQUEST@.............. with
  the body of the message (first line only): unsubscribe
  See http://www.seismicnet.com/maillist.html for more information.







Ahaaaa!  I was not aware of that choice on the TABLE = tab. =20 That corrected my error!
 
I truly appreciate your individual help and any others that = may=20 respond.  Unfortunately, people like myself without formal = background or=20 training have to scratch to find answers; the results of some of which = may be=20 correct.  The usage of WinQuake and WinSDR are thus = difficult.  The=20 HELP supplies some information, some dated, but the WHY is not always=20 answered.  Perhaps I expect too much.  I just want to learn = and know=20 as much as I can absorb.  Unfortunately, at my age I don't retain = as much=20 as years ago! (smile)
 
Regards,
Jerry
----- Original Message -----
From:=20 Stephen=20 Hammond
To: psn-l@..............
Sent: Friday, February 26, 2010 = 11:48=20 AM
Subject: RE: Help me = LEARN

Hi Jerry, There is no such thing as a dumb question and = it is=20 OK to make
mistakes. This list has always supported learning and = that was=20 one of the
main purposes we developed the original BBS and Larry = creating=20 the first
Website.

I have a question. It may sound basic but = it's=20 just a thought. You don't
record many local events I take it. Which = table=20 are you using to calc the
P&S waves in Winquake? Open Winquake = click on=20 table and select the radial
button "regional" in the lower right of = the=20 popup. As for the amount of data
to cut. Check the PSN Redwood City = website=20 (Larry's) and look at the event
files. Locate 100223.200336.ate = That should=20 give you an idea of the amount
of data to save for a local event. = The rule=20 of thumb is you want to provide
enough data so the background noise = level=20 can be established before the
event occurred. On the backend of the = event=20 you don't want to chop off any
seismic waves. For a local event = start to=20 end of the event is about 1.5 min.
Winquake default is to trap 3 = min. Poor=20 ratings: The ratings are based on
the data at the sites used for = analysis.=20 Your data may also be poor or it
could be good. It depends on your = location=20 in relation to the epicenter and
the direction of the energy and = the=20 instruments orientation N/S -- E/W -- Z
in relationship to the = event. I=20 live near the San Andreas fault zone and
there are times when the = data is=20 poor for many local on smaller events. Many
times the assessment = rating is=20 an arbitrary judgment scale based on the
assessment of the = seismologist=20 that reviewed the event file. UPLOAD DATA: I
took a look at the PSN = event=20 files for this event and I only see two event
files from JP3 and = HZ3 in=20 Texas. Have you posted any data to the event
files? =

Regards, Steve=20 Hammond
PSN San Jose, Aptos, CA

 

-----Original = Message-----
From: psn-l-request@............... =20 [mailto:psn-l-request@............... On
Behalf Of Thomas = Dick
Sent:=20 Friday, February 26, 2010 7:54 AM
To: psn-l@..............
Subject:= Re:=20 Help me LEARN

GPayton wrote:
> After reading many posts = on the=20 PSN Net, it is obvious that I know
> very little as compared to = MANY of=20 you out there.   I am often
> embarrassed to ask a = question=20 and turn to the books to try to resolve
> my question(s).  = Even at=20 that, many time I fall short.

> So! =20 Question:

>     = 1)   =20 Today's trace of the 3.1 event in Oklahoma  displays
> in = WinQuake=20 that both the *Pb* & *Sb* were seconds *_BEFORE_* the *P*
> = &=20 *S* times.  To me, that seems like I get a bouncing ball BEFORE I =
> actually drop it!  What did I do wrong?  Is this a = matter=20 of the
> "tables" being off?  Or, am I wrong in assuming = it is=20 incorrect?

>     = 2)   =20 Another "pause" that I have when using WinQuake of any event
> = is HOW=20 LONG to plot it.  Obviously, a local event would be short, a =
>=20 regional would be a little longer and a teleseismic may be over an =
>=20 hour.  But, I was wondering IF there was a rule-of-thumb time = that you=20
> experienced people use?

> Thanks & = Best=20 regards,
> Jerry
According to the St. Louis network
>=20 _http://folkworm.ceri.memphis.edu/recenteqs/Quakes/quakes0.html_
, = this=20 quake was not a good one ... they rated it as poor. I have =
followed their=20 analysis faithfully and such a rate makes for some poor
readings = of the=20 incoming times of wave=20 = types.
__________________________________________________________
<= BR>Public=20 Seismic Network Mailing List (PSN-L)

To leave this list email = PSN-L-REQUEST@............... =20 with
the body of the message (first line only): unsubscribe
See = http://www.seismicnet.co= m/maillist.html=20 for more=20 = information.

_____________________________________________________= _____

Public=20 Seismic Network Mailing List (PSN-L)

To leave this list email = PSN-L-REQUEST@............... =20 with
the body of the message (first line only): unsubscribe
See = http://www.seismicnet.co= m/maillist.html=20 for more information.

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