Highlights Interpolated and non-interpolated total electron content (TEC) data were analyzed. Regional and local characteristics of TEC variations were revealed. Local TEC disturbance arose preparatory to the earthquake shock. The local TEC disturbance was localized at lower ionosphere.
Abstract Ionospheric TEC (total electron content) variations derived from GPS measurements recorded at 7 GPS stations in Northern, Central and Southern Italy before and after the 2009 Abruzzo earthquake (EQ) of magnitude Mw6.3 were processed and analyzed. The analysis included interpolated and non-interpolated TEC data. Variations in the TEC of both regional and local characteristics were revealed. Several regional changes were observed in the studied period: 1 January–21 April 2009. After analyzing non-interpolated TEC data of 5 GPS stations in Central Italy (Unpg (Perugia), Untr (Terni), Aqui (Aquila), M0se (Rome) and Paca (Palma Campania, (Naples)), a local disturbance of TEC was also found. This local TEC disturbance arises preparatory to the EQ main shock occurred at 01:32 UT on 06 April 2009, maximizes its amplitude of ∼0.8TECu after the shock moment and disappears after it. The local TEC disturbance was confined at heights below 160km, i.e. in the lower ionosphere.
Local changes in the total electron content immediately before the 2009 Abruzzo earthquake
Advances in Space Research ; 55 , 1 ; 243-258
2014-09-24
16 pages
Article (Journal)
Electronic Resource
English
Local changes in the total electron content immediately before the 2009 Abruzzo earthquake
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