Discussion
In #Munich, you might see (and hear, feel) this weird machine, making weird vibration and sound sweeps. This is part of the Giga-M project. Its goal is to create a detailed 3D map of the underground in Munich and surrounding areas (in total 1100 square kilometres) that will be made available as #OpenData to assist in planning geothermic plants. Switching away from fossil fuel for heating. Impressive!
https://giga-m.de (in German)
@jwildeboer At first I was wondering about all those little picknick boxes laying around town. Some of these geophones now get swept up with the fallen foliage. https://share.google/B4JM3ajus8vMNwCaR
@boriskarnikowski @jwildeboer huh? I thought these are on a stake, pressed firmly into the ground
@uint8_t @jwildeboer No, here in Munich they are just laying on the ground, mostly in the outskirts, but the other day I saw one at Müllersches Volksbad. There has been some coverage in the news about not moving them.
@jwildeboer Oh, so now the trucks are rolling? I have seen these sensors/microphones installed on sidewalks.
@compfu They did a first run a few years ago here in Trudering, to extend the Riem geothermics, so I already experienced the sweeps and could talk to the people operating the trucks and sensors. Fascinating stuff!
@jwildeboer @compfu I recall them working their way down Leopoldstrasse in 2008? 2009? We had to shut down computers. Spinning discs didn't like the vibrations...
Install Fedizen
Get the full app experience
@jwildeboer very old but reliable technique. DMT heritaged the Vibriseis trucks from Prakla-Seismos in rhe 90ies - the only improvements are the electronic parts. The plates in the middle of the truck are up while drivkng to locations than they are being liwered and execute vibrations (thd sweep) of different frequency (7-120Hz) into the ground. Geophones (not shown in the picture) record ground motions from reflected energy. The result is a 3D image