Date de production
1924-01-01
6521
In May 1924, the ONRSI Aeronautics and Meteorology Committee carried out four explosions at La Courtine to study and observe the propagation of seismic and sound waves. The third explosion took place on Sunday 25th at 9 a. m. and the fourth on the 26th at 8 p. m.
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1924-01-01
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