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.
Plotting seismograms with increasing epicentral distance using python (codes included)
Short demostration of how to plot the distance vs seismic waveforms and mark the P and S arrival times using the IASP91 earth model. Codes are included.
Plotting track and trajectory of tropical cyclones on a topographic map in python (codes included)
Short demonstration of how to plot the track or trajectory of a hurricane on a map. Codes are included.
Visualizing power spectral density using obspy in python (codes included)
Short demonstration of the ppsd class defined in Obspy using 3 days of data for station PB-B075
![Some handy mac tweaks [macos]](https://earthinversion.s3.us-west-1.amazonaws.com/mac-tweaks/open-in-terminal.jpg)
Some handy mac tweaks [macos]
Some handy tweaks for mac like relocating default screenshot location, renaming batch files etc
![Introduction to automating mac [macos]](https://earthinversion.s3.us-west-1.amazonaws.com/mac-automation/automator.jpg)
Introduction to automating mac [macos]
Mac can be easily automated by the help of several tools such as automator, quick actions, applescripts
![Iphone shortcut to quickly log body temperature [ios]](https://earthinversion.s3.us-west-1.amazonaws.com/iosShortcuts/Fig2.jpg)
Iphone shortcut to quickly log body temperature [ios]
Shortcut code for quickly logging temperature in Apple health app
Automatically plotting record section for an earthquake in the given time range in python (codes included)
Python code to automatically plot the record section for the highest magnitude earthquake in the given time range
![Mac quick action to rate the songs in apple music app [macos]](https://earthinversion.s3.us-west-1.amazonaws.com/mac-quick-action/figure0.jpeg)
Mac quick action to rate the songs in apple music app [macos]
Quick action for mac to easily love, dislike, rate songs in apple music app
![Numerical tests on travel time tomography [matlab]](https://earthinversion.s3.us-west-1.amazonaws.com/tomographyModel1.jpg)
Numerical tests on travel time tomography [matlab]
Introduction to the concepts of tomography with equations and codes. Introduction to the concepts of overdetermined, underdetermined and mix-determined probl...
Monte carlo simulation to test for the correlation between two dataset in matlab (codes included)
We test for the correlation coefficients or the covariance between two sets of random numbers selected from normal distribution using the Monte Carlo simulat...
Easy statistical analysis using the tools of matlab (codes included)
Visualize the statistics of the data using MATLAB: mean, median, std, interquartile range, skewness, kurtosis, t-statistic, degrees of freedom
Hypothesis test in matlab (codes included)
Using Randomization to test the disprove the null hypothesis
Topographic map clipped by coastlines in python (codes included)
This post demonstrate how to use Python to set up clip topographic map based on coastlines.
Topographic map with shading in python (codes included)
Generating GMT style shaded relief map in Python
Plotting seismograms with increasing epicentral distance using python (codes included)
Short demostration of how to plot the distance vs seismic waveforms and mark the P and S arrival times using the IASP91 earth model. Codes are included.
Plotting track and trajectory of tropical cyclones on a topographic map in python (codes included)
Short demonstration of how to plot the track or trajectory of a hurricane on a map. Codes are included.
Visualizing power spectral density using obspy in python (codes included)
Short demonstration of the ppsd class defined in Obspy using 3 days of data for station PB-B075
Some handy mac tweaks [macos]
Some handy tweaks for mac like relocating default screenshot location, renaming batch files etc
Introduction to automating mac [macos]
Mac can be easily automated by the help of several tools such as automator, quick actions, applescripts
Iphone shortcut to quickly log body temperature [ios]
Shortcut code for quickly logging temperature in Apple health app
Automatically plotting record section for an earthquake in the given time range in python (codes included)
Python code to automatically plot the record section for the highest magnitude earthquake in the given time range
Mac quick action to rate the songs in apple music app [macos]
Quick action for mac to easily love, dislike, rate songs in apple music app
Numerical tests on travel time tomography [matlab]
Introduction to the concepts of tomography with equations and codes. Introduction to the concepts of overdetermined, underdetermined and mix-determined probl...
Monte carlo simulation to test for the correlation between two dataset in matlab (codes included)
We test for the correlation coefficients or the covariance between two sets of random numbers selected from normal distribution using the Monte Carlo simulat...
Easy statistical analysis using the tools of matlab (codes included)
Visualize the statistics of the data using MATLAB: mean, median, std, interquartile range, skewness, kurtosis, t-statistic, degrees of freedom
Hypothesis test in matlab (codes included)
Using Randomization to test the disprove the null hypothesis
Topographic map clipped by coastlines in python (codes included)
This post demonstrate how to use Python to set up clip topographic map based on coastlines.
Topographic map with shading in python (codes included)
Generating GMT style shaded relief map in Python