Finding Tiny Earthquakes by Their Fingerprints
A three-station seismic matched-filter experiment shows how repeating waveform shapes reveal small earthqua...
Utpal Kumar, PhD
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- 151+ Posts
- 12 Topics
- Oct 2026 Updated
What Happens When You Open a Website? TCP, TLS, and HTTP Explained
A simple shop-and-courier analogy explains how TCP delivers data, TLS protects it, and HTTP gives a website...
Recent posts
Recent technical articles on seismic analytics, scientific computing, numerical modeling, and production data workflows.
The easy way to compute and visualize the time & frequency domain correlation (codes included)
In geophysics, it is important to understand and identify the complex and unknown relationships between two time-series. Cross-correlation is an established ...
Monte carlo methods and earthquake location problem (codes included)
The common geophysical problems most often have multimodal objective function with many possible minima. In this post, we will look into the Monte Carlo meth...
Plotting a record section using obspy (codes included)
Quickly plot record section of a stream using Obspy. I will introduce you how to make a stream from a set of SAC data, plot the record section and store it a...
Writing and formatting a scientific manuscript in microsoft word
If you are ready to use the Microsoft Word as your favourite tool for writing your awesome scientific thoughts and ideas into a manuscript, then I would like...
A modern system monitor app in python (codes included)
I built a cross-platform Python desktop app to monitor CPU, RAM, disk, processes, and network usage in real time.
Build a flask web application: sea level rise monitoring (codes included)
This post gives a quick introduction on how to build a web application using Flask and deploy on Heroku server. Then, I share my codes for building advanced ...
Write ascii data to mseed file using obspy (codes included)
In this post, I will read a ASCII file whose first few lines contains the header information and then the three-component data. I will read using the pandas ...
Least-squares method in geosciences (codes included)
Least-squares method is a popular approach in geophysical inversion to estimate the parameters of a postulated Earth model from given observations. This meth...
Speed-up your codes by parallel computing in python (codes included)
Parallel computing is quickly becoming a necessity. Modern computers comes with more than one process and we most often only use single process to do most of...
Advanced 2d plots with matplotlib in python (codes included)
Codes for plotting advanced 2D plots using matplotlib library in Python. Includes simple 2D plot, error bars, bar graphs, histograms, multiple plots, etc
Time-frequency analysis in matlab (codes included)
A signal has one or more frequency components in it and can be viewed from two different standpoints: time-domain and frequency domain. In general, signals a...
Hypothesis test for the significance of linear trend using the monte carlo simulations (codes included)
We pose a null hypothesis and enquire that given that the null hypothesis is true, how likely is the observed pattern of results? This likelihood is known as...
How to avoid common mistakes in analyzing correlations of two time-series
Most often data analyst consider correlation between two time-series as a causation effect. Two time-series are correlated that does not imply that one cause...
Estimation of the degrees of freedom for time series (codes included)
Numerical tests to understand the degrees of freedom in time series
The easy way to compute and visualize the time & frequency domain correlation (codes included)
In geophysics, it is important to understand and identify the complex and unknown relationships between two time-series. Cross-correlation is an established ...
Monte carlo methods and earthquake location problem (codes included)
The common geophysical problems most often have multimodal objective function with many possible minima. In this post, we will look into the Monte Carlo meth...
Plotting a record section using obspy (codes included)
Quickly plot record section of a stream using Obspy. I will introduce you how to make a stream from a set of SAC data, plot the record section and store it a...
Writing and formatting a scientific manuscript in microsoft word
If you are ready to use the Microsoft Word as your favourite tool for writing your awesome scientific thoughts and ideas into a manuscript, then I would like...
A modern system monitor app in python (codes included)
I built a cross-platform Python desktop app to monitor CPU, RAM, disk, processes, and network usage in real time.
Build a flask web application: sea level rise monitoring (codes included)
This post gives a quick introduction on how to build a web application using Flask and deploy on Heroku server. Then, I share my codes for building advanced ...
Write ascii data to mseed file using obspy (codes included)
In this post, I will read a ASCII file whose first few lines contains the header information and then the three-component data. I will read using the pandas ...
Least-squares method in geosciences (codes included)
Least-squares method is a popular approach in geophysical inversion to estimate the parameters of a postulated Earth model from given observations. This meth...
Speed-up your codes by parallel computing in python (codes included)
Parallel computing is quickly becoming a necessity. Modern computers comes with more than one process and we most often only use single process to do most of...
Advanced 2d plots with matplotlib in python (codes included)
Codes for plotting advanced 2D plots using matplotlib library in Python. Includes simple 2D plot, error bars, bar graphs, histograms, multiple plots, etc
Time-frequency analysis in matlab (codes included)
A signal has one or more frequency components in it and can be viewed from two different standpoints: time-domain and frequency domain. In general, signals a...
Hypothesis test for the significance of linear trend using the monte carlo simulations (codes included)
We pose a null hypothesis and enquire that given that the null hypothesis is true, how likely is the observed pattern of results? This likelihood is known as...
How to avoid common mistakes in analyzing correlations of two time-series
Most often data analyst consider correlation between two time-series as a causation effect. Two time-series are correlated that does not imply that one cause...
Estimation of the degrees of freedom for time series (codes included)
Numerical tests to understand the degrees of freedom in time series