Easter mystery –750 seismic sensors passed out in nature
These geophones served during a recent geophysical prospecting campaign in the agglomeration of Lausanne. They contain important data.
Posted today at 6:40 p.m.
Some 26,000 geophones were laid for the geophysical prospecting campaign in 43 municipalities in the Lausanne agglomeration.
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- Lausanne industrial services have deployed 26,000 sonic sensors to map the basement.
- Technical teams have surveyed nearly 11,000 points for eighteen nights.
- More than 750 geophones are now lacking in the region.
- The recorded data is crucial to create an underground modeling in 3D.
It’s a bit of Easter’s mystery. Sensors called “geophones” have disappeared after having served as part of a recent Geophysical prospecting campaign Led in 43 municipalities in the Lausanne region. “These are seismic sensors that record the vibrations of vibrating trucks and tell us the geography of the basement,” explains the geo2x company mandated for these operations. Some 26,000 geophones had been placed on the territory. 750s are missing.
Launched in mid-March, the geophysical campaign, led by the Sil and Geool SA, took place for 18 nights and 10,925 points were vibrated. “Thanks to the mobilization of technical, scientific and communication teams, the acquisition of data has been carried out in excellent conditions. The population has generally been welcomed to vibrating trucks that have crisscrossed the streets at night, ”said the city of Lausanne in a press release.
Where did they go?
Where did the missing geophones go? In Rome, like bells? More seriously, the probes that were placed in the forest may have been moved by animals. “We can imagine that those placed around schools were picked up by children. Other people may have been tempted to kicks in it, ”says Geox.
The problem is that all these probes were filled with data, harvested during the geophysical prospecting campaign. They are therefore essential for the operation to be a real success.
Anyone who finds one of these small devices can report it to [email protected] or by phone on 079 536 43 21 or on www.geool.ch. “We really need it to get a 3D image of the basement. These geophones have no value, ”says Geo2X.
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Laurent Antonoff is a journalist at the Vaud section since 1990. After having covered the Northern Vaud regions and the Riviera, he joined the Lausanne editorial staff at the turn of the millennium. A novelist in his spare time, he was a winner of the Local Journalism Prize at Berner Zeitung in 1998.More info
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