Archive

Chronological list of all posts

› Selected Paintings

Visual arts and photography favourites Read More ›

All quotes › Reading Clippings

A collection of quotes from readings over the years Read More ›

Statistics gone wild, girls gone average › Simpson's Paradox

Read More ›

All quotes › Reading Clippings

A collection of quotes from readings over the years Read More ›

The beauty of maths › Rosaces and multiplication tables

When multiplication tables morph into beautiful rosaces Read More ›

All quotes › Reading Clippings

A collection of quotes from readings over the years Read More ›

› Puzzles and Problems

Some challenges to solve Read More ›

Maths › SVD and PCA

Singular value decomposition and principal component analysis Read More ›

Maths › Bayes Theorem

Basic notions of statistics Read More ›

Signal Processing › PSD

Spectral Density, Parseval theorem and Root Mean Square,... in Proper Units... Read More ›

Signal Processing › Minimum Phase

What kind of normalisation can be found on correlated vibroseis data Read More ›

Maths › Vector Calculus

Gradient, Laplacian and Divergence: the workhorses of differential calculus. Read More ›

Maths › Stacking : The Square-Root Law

An intuitive demonstration of why random noise stacks out proportionally to the square-root of the stacking fold. Read More ›

Maths › Parabola Interpolation

How to include uncertainties in the model and data spaces. Read More ›

Seismic Processing › Interval and RMS velocities

How to convert from interval to RMS velocities. And the way around. Read More ›

Rock Physics › Solving the Wave-Equation using Finite-Differences

Seismic modeling Read More ›

Rock Physics › Elasticity

Basics of Elasticity for the Geophysicist in a Hurry. Read More ›

Rock Physics › P-wave anisotropy : Thomsen & Tsvankin Parameters

A little primer on the connection between elasticity and seismic velocities. Read More ›

Quantitative Interpretation › Zoeppritz equations primer

AVA basics Read More ›

Survey Design › Fresnel Zone, Migration Aperture and Survey Apron

Target Oriented Survey Design. Read More ›

Survey Design › Spatial Aliasing

Elementary. Read More ›

Acquisition › Generalized Sweep Equation

Framework for advanced sweep design. Read More ›

Acquisition › Noises and Sensor Wiring

Pickup, ambient and recorder noise on a geophone array. Read More ›

Seismic Acquisition › Geophone Response

The recorded Earth motion gets its phase and amplitude modulated by the physical nature of the instrument. Read More ›