Armando Caligiuri electrons in
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Armando Caligiuri electrons in
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 Welcome at the page of my website dedicated at the seismology. Through this page you can view the seismograms produced by my seismograph installed in the province of Crotone. The choice to publish such a page is due to the awareness of being born and living in a land where seismic danger is at the highest levels, due to the highly seismic faults that characterize it, and as if that were not enough also due to the high simicity of the areas contiguous. In fact, Italy is seismically very active, but unfortunately this is especially true for Calabria, and in this specific case for the Crotone marquisate. The Crotone marquisate is part of a clash zone between the African plate and the European plate, it is located on a small platform in relative movement towards the south-east called the "Calabro Peloritano arc" which is delimited to the north by the Sangineto tectonic line and to the south by the Taormina tectonic line. The Crotone marquisate, subjected for hundreds of thousands of years to the pressure generated by the clash between the plates, is currently rising, and is bordered by various seismic faults, in fact in the past there has been no shortage of destructive earthquakes including those of June 1638 (6 .9 magnitude, XI of Mercalli scale) and March 1832 (6.6 magnitude, XI of Mercalli scale). However, the territory was affected by other destructive seismic events which occurred in neighboring areas, such as the Calabrian seismic sequence of 1783, the Martirano-Nicastro seismic event of March 1638 (magnitude 6.9), the Rossano earthquake of 1836 and the distructive earthquake of Reggio Calabria-Messina in 1908. From here the compulsory choice to know as much as possible a sneaky enemy, who can attack us at any time without warning and the decision to equip itself with a continuous monitoring tool, in order to grasp the possible precursor signals. The seismograph that I self-built consists of a pendulum with a weight at the lower end, which, with its micrometric movements, generates an electrical signal (via a solenoid immersed in a magnetic field), which, appropriately amplified and filtered, is subsequently converted into a digital signal via an A/D converter and processed by software on a PC. The software processes the digital signal, generates the seismograms and publishes them on the site at the scheduled intervals. Another form of monitoring is to process and display the ULF (ultra low frequency) and VLF (very low frequency) signals amplified by an appropriate receiver, also designed and self-built, using a spectrum analyzer. all this in order to capture possible precursor signals, which manifest themselves with disturbances and impulses, recognizable by an ear and an expert eye. In the image below you can see a spectrogram taken from my personal archive dating back to 2004 december 26, that is the day of the disastrous earthquake of Sumatra (magnitude 9.3), you can see how the spectrogram is particularly disturbed, a clear precursor or successor signal of a strong and violent event, which can be caught in these cases even at a great distance.  I specify that the precursor signals, according to the various documentation collected on the net, have never been lacking in the Calabrian earthquakes, and can give a warning from a few minutes to a few days before the seismic event occurs. At the link that you will find three rows below you can find an audio file with MP3 encoding lasting one minute, it is a small example of what you can listen to in the ULF-VLF band. To listen the MP3 file click on this link. What you heard in the previous audio file should not surprise you, because nature emits a varied quantity of sounds in the ULF-VLF band and every natural event has its own characteristic sounds, you just need to use the right tools to capture them. To provide proof of what has been stated you can find three lines below the link to an MP3 file that I recorded during the famous snowstorm on the night of Valentine's Day 2021. In the following lines you will find audio files recorded during violent storms, listen to the audio and you will be amazed. To listen to the Mp3 file relating to the sounds of the storm click on this link. To listen to the Mp3 file 1 relating to the sounds of the thunderstorm click on this link. To listen to the Mp3 file 2 relating to the sounds of the thunderstorm click on this link.
This image represents the most recent state of the virtual drum of my seismograph, the image can be enlarged by touching it.
THE TEXTS, AUDIO FILES AND IMAGES OF THE SEISMIC DRUM PRESENT ON THIS PAGE ARE PERMITTED FOR READING, LISTENING AND VIEWING FOR EDUCATIONAL USE ONLY, any other use is excluded and prohibited, they can be used on other sites other than this one only with written authorization from me. The material published on this page remains my exclusive property. The published data has no legal value, they are obtained from home-built equipment and could be affected by errors and inaccuracies. We decline any responsibility for any use of what is published on this web page that is not for educational use.
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