DISC 4 Calgary (10 April)

During the weeks since Jakarta I reworked my DISC slides. You may recall that in Brisbane I had a disaster as my slides had missing images and equations. In that case, I had to present from PDF files that also had some of the same issues. How did I get all the way to DISC 1 with obvious slide problems?

I built the slide sets on my Mac powerbook and desktop Mac pro. My DISC dress-rehersal was presented from the powerbook, all was well. But in Brisbane I presented from a macbook air. Turns out the problem comes from dragging certain PDF image files to powerpoint. Since Jakarta, I checked all slides in Windows and fixed any problems by using bitmap graphics instead of dragged PDFs. A bit technical, but anyway that is what I have been up to for 3 weeks. All went well with slides in Calgary.

The Calgary DISC was the largest class yet, I think the count was 110. Calgary was brown but warm and the venue (Telus convention center Macleod room) was excellent. Brian Russell was kind enough to introduce me and ask several questions throughout the day. Hugh Geiger was my CSEG host and treated me to a wonderful seafood lunch.

There were several questions about the value of Q typically used for seismic 'inverse Q' processing. These tend to be on the order of 100-150 and the question is whether this represents intrinsic, apparent or total Q. Good question.

Dinner after the DISC was delightful with my old buddy Brian Henry from Saudi Aramco days. An early breakfast with Larry Lines (another good friend) capped off a great, if brief, trip to Calgary. Now I am off to New Orleans.

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Hugh Geiger of CSEG

Roy Lindseth, famous geophysicist