Two new CIEN stations have been recently installed in the Umbria Region: in Avigliano Umbro and Città di Castello. These two new stations have same features as the nine preexisting stations. So, currently there are 11 stations continuously recording electric fields, see Figure 1. The two new stations had already been activated by July 21, 2013, when a strong earthquake, Mw = 5, struck in the Adriatic Sea a few kilometers from the shore under Monte Conero near the city of Ancona. The monitored electric signals ranged from ELF (4 Hz – 1 kHz) to LF (25 kHz – 100 kHz) bands (Fidani, 2011). Three stations were not recording at that time: Siena, Città di Castello and Capitignano. According to reports received by EMSC, the main shock occurred at 01:32 UTC (local time Sunday, July 21, 2013 at 03:32) and lasted for 10-20 seconds. The depth of the shock was reported as 5 km, near the villages of Numana and Sirolo, Ancona Province. No damage or injury was reported. Two probable macro anomalies were collected from the population. One earthquake light (Fidani, 2010) was observed hours before the shock by two witnesses. It was reported as a ball of light positioned toward the south, at about 00:00-00:30 LT 21 July 2013. That morning, the witnesses were traveling by car from the south of Ancona towards Loreto along the highway when they saw a light from behind a hill in the west. It was bigger than a street light but smaller than the Moon. This luminous sphere was a faded white color. This light quickly moved from the west to the east, forming an arc downwards and disappearing behind houses. This event lasted 2 seconds. Furthermore, gas bubbles appeared in the sea around the port of Numana days after the quake. From 2011, the necessity to better understand the sources of some signals has been supported by the idea that a number of different measurements at each CIEN site should be increased. Thus, the Fermo and Torre Pellice Stations have been recently equipped with Geiger counters for atmospheric radioactivity, as well as meteorological stations which record temperature, humidity, wind speed and direction, atmospheric pressure and rainfall. The Fermo Station has also been equipped with an underground thermometer to measure ground temperature and an LF radio receiver at 150 kHz to record amplitude modulation. The Torre Pellice Station had already been equipped with a magnetometer, a Radon meter and a compass to check the direction of the geomagnetic field. Recently, this station has been equipped with an sub-sound detector to investigate for the origin of animal responses to earthquakes (De Liso, 2013). The Perugia Station has been recently equipped with a new electromagnetic sensor, sensitive to electric charges and vertical electric fields. The same station has always measured for meteorological parameters and seismological activity through the “A. Bina” Observatory.
Electromagnetic perturbations associated with M = 5, July 21, 2013, Ancona, Italy earthquake observed by CIEN
STOPPA, Francesco;
2013-01-01
Abstract
Two new CIEN stations have been recently installed in the Umbria Region: in Avigliano Umbro and Città di Castello. These two new stations have same features as the nine preexisting stations. So, currently there are 11 stations continuously recording electric fields, see Figure 1. The two new stations had already been activated by July 21, 2013, when a strong earthquake, Mw = 5, struck in the Adriatic Sea a few kilometers from the shore under Monte Conero near the city of Ancona. The monitored electric signals ranged from ELF (4 Hz – 1 kHz) to LF (25 kHz – 100 kHz) bands (Fidani, 2011). Three stations were not recording at that time: Siena, Città di Castello and Capitignano. According to reports received by EMSC, the main shock occurred at 01:32 UTC (local time Sunday, July 21, 2013 at 03:32) and lasted for 10-20 seconds. The depth of the shock was reported as 5 km, near the villages of Numana and Sirolo, Ancona Province. No damage or injury was reported. Two probable macro anomalies were collected from the population. One earthquake light (Fidani, 2010) was observed hours before the shock by two witnesses. It was reported as a ball of light positioned toward the south, at about 00:00-00:30 LT 21 July 2013. That morning, the witnesses were traveling by car from the south of Ancona towards Loreto along the highway when they saw a light from behind a hill in the west. It was bigger than a street light but smaller than the Moon. This luminous sphere was a faded white color. This light quickly moved from the west to the east, forming an arc downwards and disappearing behind houses. This event lasted 2 seconds. Furthermore, gas bubbles appeared in the sea around the port of Numana days after the quake. From 2011, the necessity to better understand the sources of some signals has been supported by the idea that a number of different measurements at each CIEN site should be increased. Thus, the Fermo and Torre Pellice Stations have been recently equipped with Geiger counters for atmospheric radioactivity, as well as meteorological stations which record temperature, humidity, wind speed and direction, atmospheric pressure and rainfall. The Fermo Station has also been equipped with an underground thermometer to measure ground temperature and an LF radio receiver at 150 kHz to record amplitude modulation. The Torre Pellice Station had already been equipped with a magnetometer, a Radon meter and a compass to check the direction of the geomagnetic field. Recently, this station has been equipped with an sub-sound detector to investigate for the origin of animal responses to earthquakes (De Liso, 2013). The Perugia Station has been recently equipped with a new electromagnetic sensor, sensitive to electric charges and vertical electric fields. The same station has always measured for meteorological parameters and seismological activity through the “A. Bina” Observatory.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
