Did you know that...
The oldest seismograph in the world used dragons and toads instead of needles and pendulums?
Eight dragons, representing the strength of the Earth, hold eight bronze balls in their mouths. Upon perceiving an earthquake, they drop them at the base of the seismograph where eight toads, the animal most sensitive to seismic movements, wait with their mouths open.
This was the first seismograph, built more than 2,000 years ago. Today, from the volcanic zone of Catalonia, land of earthquakes, we detect community movements in rural areas, and with a version of the old seismograph we are preparing to analyze the possibilities that these movements can generate in the territory.