Demolition of the Sprecherhof in Aarau recorded by seismographs

The rare event of a controlled demolition of a structure in Switzerland was captured by the sensitive seismic stations of the Swiss Seismic Network. As the figure shows, shortly after 02:10AM (01:10 UTC) early Friday morning (8 March 2013), seismic waves produced by the explosions and the resultant collapse of the Sprecherhof building are clearly visible at the station EMMET located only 8 km from Aarau.