Hi Don,

don't appologise for Czechoslovakia. I like Slovakia and, I suppose, we will be soon together again (from the geological point of view).
As regards to the energy, I did not think about temperature energy or E=mc2, but I though about elastic energy that can to transform to the seismic energy. The transformation ratio is about 1/1000. I measure the seismic energy. The low treshold of our measurements is energy about 1J (seismic energy) which is about 0,4 kg of blasting material.
I am in close contact with many people of Rock Structure and Mechanics Academy of Sciences, but I am working in Ostrava that is about 300 km far from Prague.