John Leeman (@geo_leeman) spoke with us about geophysics and associated technology. John is one of the hosts of the Don't Panic GeoCast (@dontpanicgeo, iTunes). Some episodes you may like: What if you calibrated your candles differently? Out of the Country (Brad Jolive on moon rocks) "Rock Drills and Beer" Undersampled Radio John is teaching a course at Penn State called Techniques of Geoscientific Experimentation. The information and textbook is online! It uses the SparkFun Inventor's Kit. John has a website with a blog. He has some Cheerson CX-10 tiny drone posts (my favorite, also Alvaro's repo and my posts). John also has a consulting company: Leeman GeoPhysical. Python! Lots of Python was discussed. Jupyter notebooks (here is a good tutorial) Example of reproducing a figure from a paper John's friction model (repo and talk he gave about it at SciPy2016) Neat SciPy talk about open textbooks SciPy is a Python conference in Austin, TX in July Finally, in lieu of rock puns, here is a neat animation showing many different waves from earthquakes. Contest! Contest ends October 1st and now there are more books! In addition to the ones Bob Apthorpe is sponsoring, John's consulting company will sponsor: Earthquake Storms: An Unauthorized Biography of the San Andreas Fault by John Dvorak and The Soul of A New Machine by Tracy Kidder.