1997:6840Share edittextuser=3497 post_id=6840 initial_post_id=0 thread_id=1997
« Deep Earth Workshop Discussions
Group 2 - Seismology
1997:6842Share edittextuser=3497 post_id=6842 initial_post_id=0 thread_id=1997
Could you explain the Sudoku bit some? I'm having a hard time visualizing it, but it sounds cool.
1997:6880Share edittextuser=3484 post_id=6880 initial_post_id=0 thread_id=1997
When I tried this before, I gave students the numbers 1, 5 ("avg"), and 8 blindly, then told them to get together and tell me the sums of the "rows" and "columns" of desks in the room. I was able to figure out where the 1's and 8's were based on the sums, and could map out the anomalies similar to the way (really basic) tomography would work. Depending on the group, you may get close to the right answer but in slightly the wrong location, or you might come up with a couple of possibilities but no unique solution.
I'm not exactly sure how this would work on a larger scale, but thought putting the idea out there might spur other ideas/strategies. I like it because it's a hands-on approach that might give students some insight before setting them up with a USArray style tomography exercise. I'm happy to work with others to try to develop this a bit further if people are interested (or feel free to run with it on your own if you have ideas on how it could be set up!).
1997:6966Share edittextuser=3497 post_id=6966 initial_post_id=0 thread_id=1997
1997:6968Share edittextuser=3497 post_id=6968 initial_post_id=0 thread_id=1997
We are developing it in three pieces, which can be used together or separately. The first level is like the quick in-class activity I used Friday. The second level incorporates the fact that the UW-Milwaukee seismograph is 5.8 km north of the Hoan Bridge, so the record did not result from a simple down-and-back straight-line geometry. The third level may have the students work with the digital data.
My goal is to get the first level done for Wednesday morning, and to start on the second level. Keith has to track down the digital file for the event, so the third level will be something that we develop in the coming weeks.
1997:7005Share edittextuser=266 post_id=7005 initial_post_id=0 thread_id=1997
Two other items I plan to develop for this set in the coming weeks are as follows:
 A revision of my "compute the travel times assuming Earth is the same density throughout" homework sheet ( bearspace.baylor.edu/Vince_Cronin/www/EarthInterior/EarthIntHomework1.pdf )
 A "How do the predicted travel times compare with the observed travel times" project that would give students an experience using data from seismic data repositories like the IRIS DMC. This could complement a seismic tomography project by potentially having students find anomalies (i.e., differences between predicted and actual arrival times) in the data from a single earthquake.
1997:7006Share edittextuser=266 post_id=7006 initial_post_id=0 thread_id=1997
I can't do the call-in tomorrow - have class...but I'll keep on chugging along on my activity
1997:7321Share edittextuser=3484 post_id=7321 initial_post_id=0 thread_id=1997