GNGTS 2022 - Atti del 40° Convegno Nazionale

GNGTS 2022 Sessione 2.1 233 Fig. 2 - Photos of the Radon Station settings in the historical centre of Gubbio; the Radon detector is on the right, which is inserted inside the tube shown in the centre; the tube is closed and is almost completely buried in the ground. The counting rates of stations were determined using different solutions, by either serial ports which measure the port state changes or data loggers. For the station in the historical centre of Gubbio, the Lascar EL-USB-5 event, counts and State Data Logger with USB was used, (https://www.lascarelectronics.com/easylog-el-usb-5) . This data logger can record up to 32,510 events, state changes and count events. Fast logging rates allow event capturing at speeds of up to four times per second and state changes at speeds of up to two times per second. Whereas event counting can operate at speeds of up to 100 times per second. Radon measurements were accompanied by measurements of temperature, pressure and humidity of the environments where they were the counting rates were taken. An example of a recording of Radon counting decay is shown in Fig. 3 for the station in the historic centre of Gubbio. These data are combined with the environmental data captured by the internal sensors of a PCE-FWS 20 weather station. Also, seismic events of greater intensity that occurred in the surroundings of the station have been stored in the database and plotted in Fig. 3. Fig. 3 - The counting rate of the Radon decay in Gubbio historical centre over a two-week period is shown in red; the relative humidity is indicated in yellow; while the overall pressure is shown in green; the local temperature is indicated in blue; the times of seismic event are indicated by yellow stars, whereas the unexpected event of anthropic influence is indicated by a broken line circle. References Fidani, C.; 2011: The Central Italy electromagnetic network and the 2009 L’Aquila earthquake: observed electric activity . Geosci. J., 1 (1), 3–25. Fidani, C., and Martinelli, G.; 2015: A possible explanation for electric perturbations recorded by the Italian CIEN stations before the 2012 Emilia earthquakes . Boll. Geofis. Teor. Appl., 56 , 211–226. Fidani, C., and Marcelli, D.; 2017: Ten Years of the Central Italy Electromagnetic Network (CIEN) Continuous Monitoring . Open Journal of Earthquake Research, 6 , 73–88. Fidani, C., Orsini, M., Iezzi, G., Vicentini, N. and Stoppa, F.; 2020: Electric and Magnetic Recordings by Chieti CIEN Station During the Intense 2016-2017 Seismic Swarms in Central Italy . Front. Earth Sci., 8 , 536332. Pulinets, S. A., Ouzounov, D. P., Karelin, A. V. and Davidenko, D. V.; 2015: Physical bases of the generation of short- term earthquake precursors: a complex model of ionization-induced geophysical processes in the lithosphere atmosphere-ionosphere-magnetosphere system . Geomagn. Aeron., 55 (4), 521–538.