New on StackExchange: Temporal Resolution of Seismic data

Radius of the Fresnel zone is given by [math]Rf=(v/2)(t_0/f_\mathrm{dom})^{1/2}[/math] where v: velocity of layer [math]t_0[/math]: two way travel time [math]f_\mathrm{dom}[/math] :dominant frequency in the spectrum This shows that high frequencies give better resolution than lower frequencies and resolution deteriorates with depth and increasing velocities. However I found some text in “Seismic Data Analysis- Yilmaz” which […]

Lifesavers – Two tools in my daily worklife

Today I’d like to share two tools that I have found indespensible in the course of my studies. Ironically, these have nothing to do with geophysics or seismic at all. But they’re out to save you. Git Git is a very low-key version control tool. At certain points in the process of creating you can […]

Promax 2D Multiple Reduction

I am at a point, I could use some help with the program Promax 2D from Landmark Corp. I have posted in a LinkedIn group and this way I hope I may get some signal boost for my question. Do you have some experience with the following? Help a fellow Masters student out? I am […]

Do you know your seismic velocity?

In seismic data analysis a lot of work goes towards getting a good velocity model of the subsurface. We talk about the seismic velocity. However, this may lead to some serious misconceptions. One step in seismic processing is velocity analysis. We pick the velocity that adjusts our data for the best value. Usually this is […]

Keep your software up to date

Do you have to use Java from time to time? I do and I hate the Java software. Basically, every time I start my computer it asks to update some very important security issue. It is a security leak and not keeping it updated will not do me any favors. Of course you have to […]

Fourier and Space – The FX Domain

Geophysics can get a little fancy. You have probably heard the geophysicists tend to hang around some mathematicians. When it comes to the topic of math most of my friends like to state: “I was good at math until they started mixing in the alphabet!” I hear ya. Complex numbers and pi and variables are […]

EBCDIC punch card from 1964.

How punch cards helped me get to know my data – EBCDIC

Today I learned something interesting. Old habits die hard and seismics is a pretty old business. There are a couple of standards for storing seismic data in file formats. One of them is the so-called SEG-Y standard. It starts with information about the data set called header and then the actual seismic data is written. […]

Know your scale – Why wavelengths are so important

So you thought there is just one “seismics”? In general, we might say that the seismics experiment is watching mechanical waves travel through Earth and then apply science on it to get an image of the Earth’s interior. However, this experiment and the science behind it has a high degree of uncertainty. When we conduct […]

Improve your programming; be a better geophysicist

My personal experience with geophysics is that it’s very heavy-sided towards programming. For me this is great. I have been quite the nerd in my childhood and learned some very basic C programming on my first computer. However, I can understand if you didn’t have that kind of head start. A lot of my mates […]

A Global Lithological Map

It’s colorful, it’s huge and it’s a hundred times more detailed than its predecessors. <span class=”removed_link” title=”http://www.vis.klimacampus.de/2270.html&L=1″>http://www.vis.klimacampus.de/2270.html?&L=1</span> It’s a new lithological map of the worldHartmann, J., & Moosdorf, N. (2012). The new global lithological map database GLiM: A representation of rock properties at the Earth surface Geochemistry Geophysics Geosystems, 13 DOI: 10.1029/2012GC004370. The map is […]