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Reply #94: I don't understand [View All]

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Home » Discuss » Topic Forums » September 11 Donate to DU
Robb Donating Member (1000+ posts) Send PM | Profile | Ignore Wed Sep-29-04 07:37 AM
Response to Reply #83
94. I don't understand
You speak with authority to three things that require more explaining.

1) In what way is Wallace making a name for himself?

2) What gives you the idea the event registered at "barely above noise levels"? At which of the stations do you believe this happened? And finally (on this one), what do you think "noise levels" are?

3) Assuming you mean Rorschach, you should tell us: what do you see in arriving waves? I see recorded velocity of p and s waves that give travel times and azimuths. There is nothing to "interpret".

For the moment, if you want to actually learn about this, here's my suggestion:

Head to IRIS. Identify the stations near the crash that were operating that day. Identify the timeseries data you want to obtain. Start an account and do so. Download the SEED data. Find a SunOS workstation -- or go buy one, as I did in 2001. Find a server hosting rdseed. Download, compile, and run rdseed on your SEED data sets, unpacking them. Save the datasets in whatever your plotter program understands (in my case I had to use rdseed to turn sets into SEGY data, then segy2sac to create SAC format files, which then could be read by Wiggles).

For fun, pick up Kim's LDEO team's data and reproduce the work. It will make no sense to you why he backed away from it.

MIT has done some good work on non-earthquake seismic events, crashes, refinery explosions, things like that. Plenty to read. I've got phone numbers you can have of fine people in Geology departments who walked me through the 300-series basics.

Then come back and talk about noise, or making a name for yourself.
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