Jon Claerbout's officeclaerbout @ stanford.edu Short bio
The Green Professor (emeritus) at Stanford University
This page is dedicated to the memory of my son (Johannes) Jos Claerbout 1974-99.
Go to my Classroom and get your free books.
Or go to the SEP project or my Launch Pad or my Publications.
My grandfather died of the 1918 Spanish flu. It's a one page story.
Seismic Entropy, my SEP presentation 10 Feb 2020.
A purpose for humanity
You can see sunset twice in one day
I have joined a small biking club. I take a photo or two each week. Includes tips for battery-assist bikes (ebikes).
Polar warming NOT Global warming
Ground roll and normal modes, basic theory with marine data examples.
Visit to Parkfield: narrated slides (Sorry about the microphone.)
I'm an enthusiast for MIT Scratch. It's a graphic computer language and a community for creative learning for ages 8-100. Check it out!
Favorite charities in 2017.
I purchased a fragment of a fossil mosasaur.
Multichannel decon: Vector-valued data: Separating independent causes. The paper. The pitch (3 min video). The video (33 minutes).
The failure of macroeconomics: I found this convincing and plan to understand it better.
Nonstationary decon: Time variable decon without mathematics (one page)
Land data: Making Marine Data From Land Data: Suppressing 2-D surface noise on a 1-D line: Google Presentation, and an 18 minute video.
White residuals: We want white residuals in both data space and model space, aka no frequencies should be discounted in the model fitting. I think I know how to accomplish this in any number of spatial dimensions. I'd like to find someone to work with me on data modeling while whitening nonstationary residuals. Paper and Video (12 minutes+3min appendix).
Streaming nonstationary prediction error applications. Here are my summer '15 thoughts on the topic. The early text with 2 pages of theory, 2 pages of code, and 2 pages of results. The first video (7:45) explains the idea. I review basics and skim the code in this second video (12:28). A considerable amount of algebraic simplification is found in the final paper and a video summary (15:10).
Jews and Arab refugees 4 minute youtube video . I do have some original thoughts about Gaza that I haven't seen elsewhere, so here they are.
Wavefront healing, what is it?
What's wrong with PowerPoint, Keynote, and Google Slides?
The Khan Academy offers a free world-class education to anyone anywhere. By 2017 over one billion lessons were delivered over the internet to 100 million readers. See its philosophy from the free introduction to Sal Khan's book at Amazon. (see the Look Inside link above the cover image). I imagine myself a missionary to college professors for Khan-style flipped classes (lecture video at home, exercises in class). I recently met Sol at a lunch after a Lab School tour for donors.
Ricker-compliant and pseudo-unitary deconvolution, here is my lecture.
Want to mark up your computer screen or your slides? I show you how (3 minute video) using free software FlySketch.
Earth greening: Google for NASA earth greening. The earth's biological productivity is rising rapidly (14% in 30 years) mainly due to increased CO2 in the atmosphere reports Matt Ridley in a Royal Society video with a transcript. Environmentalists may hate it, but it looks like good science to me. See it quicker (19 minutes), less political, and 3 years ago or for busy folk, in Snippets: (2 min) and (20 sec).
Global warming: Why are so many scientists on the global-warming bandwagon? Science is important, but not easy to justify. Earth scientists can link almost anything they do to climate, so they do. Freeman Dyson is a reputable source. His thoughtful essay concludes, "Climate models solve the equations of fluid dynamics. They might do a good job of describing the fluid motions of the atmosphere and the oceans. They do a poor job of describing the clouds, the dust, the chemistry, and the biology of fields, farms and forests. They do not begin to describe the real world that we live in."
Humanity's race between genetic meltdown and germline engineering
I invite any SEP student to join me in wrapping up a little research I have begun. Here's a short video (16:42) explaining why it should have a broad impact in seismology. The paper, Invitation to Futterman inversion gives more details.
How smart are you? How smart are others? Raven's matrices measure IQ. I explain Raven's matrices and suggest some fun IQ searches.
What does an audience pay attention to while listening to a video lecture? 36 second video.
Books published per person Are books published a reasonable proxy for books sold or read? Do prospects for democracy depend on literacy? I gleaned this data from the web in 2015 while teaching myself spreadsheet making using Google Sheets.
A former leader of Greenpeace is now a Carbon Dioxide lover! Since his 45 minute lecture is too long for many (especially those who don't like his conclusion) I have condensed it to two and a half pages. Here he gives a better lecture. Here is his most recent in 15 minutes plus Q&A.
Did SEP discover non-volcanic tremor? I retell a remarkable Stanford story from 1988.
I took a commercial cruise through the Panama Canal. I know 120 photos is too many, but the skipper said the weather there is normally rainy while we had the best weather ever, so my photos all turned out excellent. They are slightly repetitive, but the topic is so unlike my daily life, and the sights so awesome, I include it all. Go full screen. Select "Slide show". Enjoy!
I purchased an electric pedal-assist bicycle. It died after four years so I purchased a different brand.
Aged 26 in 1964 I rode a Vespa motorscooter from Stockholm to Singapore. I kept a diary that my sister typed. It's an 80 page 6 month travel diary, neither scholarly nor particularly thoughtful, but You are welcome to it. Years later I came to realize that the 2-3 weeks in bed at the Bangkok YMCA I was recovering from hepatitis (likely from Calcutta). Full recovery took more like 6-12 months.
The most astonishing discovery in my life (age 29) I recount in this 14 minute video, "The positive lags of the autocorrelation of an earthquake seismogram are a reflection seismogram!"
My sparse decon paper with Antoine Guitton recently came out in GEOPHYSICS. Nonminimum phase deconvolution in the log domain: A sparse inversion approach. We threw 5 data sets at this new method and discover events on all of them with clear polarity! Check these: Gulf of Mexico Australia California Brazil and a Chevron synthetic (omitted, perfect result). Someone here should wake up and figure out this can be a money maker.
In image estimation (very large inverse problems) prior information is prescribed not only by regularizations, but by the initial solution. I show this in a real but uncomplicated setting in this video (13 minutes).
Here's what I've learned about trying to control my body weight.
Deep beneath the Gulf of Mexico are salt layers that mess up seismic waves going through them. I prepared a 10 minute lecture on how some young student might resolve that problem and make for themselves a load of money seeing all the oil under that salt.
Who is blocking congressional testimony at youtube? It sure did look like Wall Street. But, I found out that it's not.
My first "Google PowerPoint" started with my granddaughter
Read this before you have cataract surgery.
How I fixed my leaky pool. Just in time for California's long dry summer. Hooray!
I have finally found a use for Jensen inequalities, (7 page PDF from SEP-152) and video (18 minutes)
Ground roll: suppressing it while mapping layer thickness (SEP seminar December 6, 2013). The video. The document. Revision for seminar 5-22-14.
I narrated the textbook I've been working on for the past two decades. It is 60 talks, average length is 11 minutes. The purpose is to "flip" the class. Students watch the video at home. In the classroom they ask questions and solve problems.
Make yourself a web site? Here's why, and how to make a screen video, all in a 3 minute video
My ideas on Capturing slide shows for redelivery: the revolution that will replace books and videos
Intelligence: what is it? Everyone has a different amount of it. It is politically incorrect to speak of a person's intelligence or their beauty or lack thereof, all of which are given to us at birth. What is intelligence? We Americans are impolite to speak of it. Chinese have no such hangup. They put big money in studying intelligence. Want to hear what they have to say? Here's one place to start.
Marine seismic debubbling and de-Rickering, a project report article later published in Geophysical Prospecting.
Upcoming SEG meeting (Nov 2012). Here is my practice talk. and Here are my slides.
My 3 minute slide-show on cats, astronauts, and angular momentum. (It is slides which are better viewed in Adobe Reader than in browser.)
I release my latest ideas on Mostly causal deconvolution clarifies marine seismogram polarity, a 23 minute video at youtube and slides. After you see this video, if it's not flying too high over your head, you might like this more advanced talk, Sparsity deconvolution in the log domain with variable gain, a 31 minute video and slides. Please send feedback to both me and antoine at sep dot stanford dot edu .
Here's a background article to my work of recent years. My professional product of the last couple years in a 4 page abstract.
Want to hear me speak? Here I am speaking to an audience of earthquake seismologists, telling them a little of exploration seismology and something that might help them out.
Would you like to double your Social Security benefits in exchange for all your medicare benefits? It's possible!
Will civilization collapse as we pass peak oil? when and how will it happen? Scan titles of these 20 knowledgable writers at The Oil Drum.
Adjustable focus eyeglasses? Here's my evaluation.
The nation's health care costs problem: Here is how to solve it in a rational manner.
We should save how much for retirement?
Interested in some help learning to memorize poems? I prepared some examples and software to enable you to adapt it to your own favorite poem. Here is my recital of The Cremation of Sam McGee, by Robert Service. I've never seen another poem with as much author discipline.
Iceland! An amazing trip. A few fabulous slides.
A libertarian socialist engineer's proposal to solve the financial crisis: Let me know what you think.
I've been wondering if Tar Sands would save life as we know it today.
I've prepared a tutorial on the basic algebra behind oil crisis extrapolations. In Geophysics we call it the Hubbert curve. It is closely related to the logistic function, but it has two parameters, one for growth, another for decay. In practice, the two parameters are often presumed identical, but that's a doubtful assumption.
Alumni reunion/retirement party slide shows
My retirement party in Alaska, your invitation. It was great fun!
My retirement party in Alaska, the final program
On the occasion of my retirement, my speech to local staff
Apple's iPhoto, I abandon with prejudice
In the interest of optimally compartmenting the School of Earth Science, I gave out a questionairre to members of the Stanford Earth Science Faculty to identify colleagues closest to them in curriculum. Results were input to a "banquet seating" optimization program.
I've started on a history of reproducible research.
I've written a book review on a book by Mathew R. Simmons about the decline of Saudi Oil fields.
Bob Clapp and I have been examining the Miyagi earthquake.
Students and I struggled with data from a depth sounding survey of the biblical Sea of Galilee. It's gratifying to learn our result .jpg makes a genuine contribution.
Quite by accident I took some nice pictures of Sea Dragons, and another at the Monterey aquarium.
Garry Clarke came visiting with some fabulous pictures of the Donjuk Glacier. I got him started on a picture web site. Enjoy!
Graduation pictures from 6/2004.
Noontime rainbows? See my sun dog pictures.
This is a quicktime movie that I made linking astronomy to seismology. (13 min, 40Mb)
This is a quicktime movie of people having fun at the last SEP meeting. (8min, 20Mb)
I'm working on presenting pictures of Cecil Green's trips to Arabia.
I enjoyed a small journey with the Crustal Group.
I'm trying to recover a rare seismic data set.
Ever wondered about acoustic daylight imaging? Here is a quick introduction .
This picture explains (fantastic!) the relation between 1-D and 2-D filtering. To filter, you screw the filter onto the data. Convolution in 1-D does convolution in 2-D. Deconvolution in 1-D does deconvolution in 2-D. Likewise for spectral factorization, etc. Makes a great preconditioner for inversion. Rapidly solves [1+Dxx+Dyy]u=v. The entire "Helix" paper (16 pages of .ps) or html.
Calculation of the sun's acoustic impulse response by multidimensional spectral factorization .pdf. Acoustic daylight imaging via Kolmogoroff spectral factorization: Helioseismology and reservoir monitoring .pdf.
Paper submitted to '99 EAGE Helsinki meeting. Compressed and html versions. Required format on A4 paper without title and author in .ps and in .pdf. Originals appear to be lost.
Career advice recently offered to students.
My opinion on the recent Oil company mergers.
John Burg taught me Wilson's method of spectral factorization using Newton's square root iteration. html, ( 2 pages of .ps).
A lecture on interval velocity and null space. html, ( 2 pages of .ps).
For the Optical Society: Inverse problems in Reflection Seismology .html, .ps (color, 7Mb).
Reproducible electronic documents.
I recently discovered how to factor cross-spectra. html, .ps. This is a generalization of spectral factorization.
Care to join in building a large geophone array? I have lined up $50,000 to start.
After dinner speech: Seventeen years of supercomputing and other problems.
Publications or report articles (full text) or How to write an introduction.
World oil futures
My experiments with mammograms html, .ps, .ps.gz.
Happy childhood: a morning on the shore of Lake Michigan.
My face (in 1997) 1, 2. Bio. Something valuable. Politics. Sore hands? Dowsing. Family. Twenties. Venus and Pan. 2019 annual family letter
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