The Jacknife is also sometimes called the “Leave One Out” method, and is a method to somehow evaluate the stability of statistics done on data. By leaving one element out of the input array and studying the mean of the…
Year: 2013
I’m 30…
24 September 1983. I’m born. Since then, damn, already 30 years… I’m not going to talk about my life, it’s not even interesting to myself. I’d rather give a brief history of the IT background I’ve learnt during the last…
Seismicity Rate using Obspy and Pandas
Pandas and Obspy are incredible pieces of software that definitively make my life easier ! In this tutorial, we will get seismic Event data from IRIS using Obspy, then analyse the catalog using Pandas, to end up with a “Seismicity…
Pack an Enthought Traits app inside a .exe using py2exe (Canopy Edit)
10 months ago, I published the updated version of my tutorial to pack an Enthought TraitsUI based application inside an .exe Windows Executable file, using a standard Python 2.7 install and the Enthought Tool Suite 4.0 (ETS4.0). In April 2013,…
Old 16bit DOS programs on Windows 7 (x64)
We needed to execute an old-but-working 16bits program to locate earthquakes called “HypoEllipse” (source), but calling it from the Windows 7 x64 boxes resulted in a nice : Bam ! Not working, sorry for you… No ! I say No…
Meteor in Russia – Seismic Signal ?
Very early this morning, a meteor lit up the skies of Russia, somewhere close to Ekaterinburg. Same as for the Korean Boom Boom, we wanted to have a look at the seismic data of a close-by station to check if…
Plot waveforms of events on a dates axis
Following a question from my dear colleague Devy, here is how to plot a set of events, occurring at random moments in time. The idea is to plot the waveform of each event with the beginning at the top and…
North Korean nuclear tests with Obspy
This morning, North Korea tested some nuclear “bomb” somewhere in the middle of the country (confirmed by Pyongyang officials and CTBTO), and many seismic sensors worldwide recorded the triggered waveforms. The location of the test is the same as the…
Seismicity Map and Rate using Basemap and Pandas
Imagine we want to plot a map of the seismic activity in NW-Europe and, at the same time, count the number events per month. To get a catalogue of earthquakes in the region, one can call the NEIC (note: this…
New Tutorial Series: Pandas
In the coming months, I’ll prepare some tutorials over an excellent data analysis package called pandas ! To show you the power of pandas, just take a look at this old tutorial, where I exploited the power of itertools to…
Matplotlib Basemap tutorial 10: Shapefiles Unleached, continued
Following the comments on this year-old post I’ve had a look at pyshp which seems a little more maintained (the last line in the changelog is 1 year old…), and it is indeed a quite nice piece of code. I…
Honoured !
This blog is cited in the excellent book of Wes McKinney: “Python for Data Analysis” (eds.O’Reilly)! Oh yeah! I’m proud! Thanks Wes!