Category Archives: presentations

live presentations, including the Lamont Open House demonstrations

LDEO Open House 2014 !

OCTOBER 11, 2014, 10 am – 4 pm, @ LDEO !  

How to get to Lamont-Doherty Earth Observatory:  http://www.ldeo.columbia.edu/news-events/events/open-house

We will again build our 8-channel surround sound system with the shaking floor. We will play sounds and movies that we have developed for the shows at the Hayden Planetarium, of five earthquakes in the last decade (Parkfield CA, M6, 2006; Haiti, M7, 2010; Sumatra, M9.2, 2004; Tohoku, M9.0, 2011; Kamchatka, M8.3, 2013), with new movies of earthquake sequences through time for each of the above regions, and also of data from large arrays of seismometers— all new ways of experiencing seism
ECB_faceic data. New this year, the exhibit will be interactive (!) driven by a device called the “Earthquake Control Box” (made with the incontrovertibly Douglas Repetto). We will also have smaller exhibits on listening to earthquakes in Oklahoma that were caused by human activity (deep injection of wastewater from hydrofracturing), and the ever-popular “BIRTHQUAKES!”, in which you can make a map of the five biggest earthquakes on the day you were born, and then listen to the biggest.

Magnitude 9 Tohoku Earthquake (March 11, 2011): SPECFEM with sound

This is a recent movie we put together using simulations of the Tohoku earthquake with sound from broadband seismometers (8 in a great circle mixed to stereo). We have been experimenting with ways to render the SPECFEM3D simulations to separately visualize surface and body waves, relatively low and high frequency parts of the spectrum respectively, to correspond to the sounds that are given low- and high-pass filters. So the two renderings shown here are from the same seismic data and the same simulation, just filtered differently. Matt has been developing methods in “yt” to render complex migrating wave fronts, which is an interesting visualization problem. This is our first presentation of these movies, with lots of improvement to come. For best results, view the movie at full screen and use big headphones.

Hugo

Open House, October 2012Here’s our setup for the LDEO Open House 2012 exhibit. It was the first show for Hugo, The Machine, a road case filled with all the necessary hardware for 16 channel out, including a Mac Mini, a digital interface, four 4-channel car stereo amplifiers, 16-channel powered out and 8-channel unpowered outs.  Last summer, we built the Machine and the 16 little speakers, 8 of which are hanging from the ceiling … (Photo credit: Helen Janiszewski, LDEO)