Bradyseismos
As Bradyseismos (Greek. Bradys seismos = slow movement) refers to a very slow earthquakes . Part of the earth's surface rises and falls gradually. Bradyseismos is a typical phenomenon of the Phlegraean Fields zone . The magma chamber under the Phlegraean Fields fills and empties regularly. This process is caused by igneous fluids that come from a deeper magma chamber and circulate in shallower rock layers. Depending on whether the fluids flow off or flow from the magma chamber into the upper rock layers, the entire coastal region rises and falls.
Pozzuoli
Between 1982 and 1984 there were movements of up to 1.5 meters in the small Italian town of Pozzuoli . More than 30,000 residents had to be relocated. In 2008 there were uplifts of several centimeters per year. The bradyseism has had a negative impact on the structure of the houses in this area, and the earth movements made numerous buildings in the old town in need of renovation.
In order to measure the extent of lifting and lowering better were in the Solfatara three reflectors pairs installed that can be targeted by satellites and then a leveling enable measurement.
The ancient Macellum provides evidence that the bradyseismos has been active here for centuries . Drill mussels were able to settle on the pillars of the system when the area was lowered to below sea level and seawater flowed in.
Individual evidence
- ↑ Thermodynamic model for uplift and de fl ation episodes (bradyseism) associated with magmatic - hydrothermal activity at the Campi Flegrei (Italy) (PDF; 1.6 MB)
- ↑ Marc Szeglat: Campi Flegrei - Campi Flegrei and Solfatara. In: www.vulkane.net. Retrieved September 2, 2016 .
- ↑ a b Marc Szeglat: Vesuvius - Mount Doom in the Gulf of Naples. In: www.vulkane.net. Retrieved September 2, 2016 .
- ↑ Doris Riegelegg: The sunken Pompeii . Online at derstandard.at from June 30, 2002. Accessed July 23, 2013.