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http://hdl.handle.net/2122/9858
Authors: | Nenovski, P. I.* Pezzopane, M.* Ciraolo, L.* Vellante, M.* Villante, U.* De Lauretis, M.* |
Title: | Local changes in the total electron content immediately before the 2009 Abruzzo earthquake | Journal: | Advances in space research | Series/Report no.: | 1/55(2015) | Publisher: | Elsevier Science Limited | Issue Date: | 1-Jan-2015 | DOI: | 10.1016/j.asr.2014.09.029 | Keywords: | GPS measurements Total electron content (TEC) TEC disturbance Lower ionosphere Earthquake shock |
Subject Classification: | 01. Atmosphere::01.02. Ionosphere::01.02.99. General or miscellaneous 01. Atmosphere::01.02. Ionosphere::01.02.02. Dynamics 01. Atmosphere::01.02. Ionosphere::01.02.05. Wave propagation 01. Atmosphere::01.02. Ionosphere::01.02.06. Instruments and techniques 04. Solid Earth::04.06. Seismology::04.06.99. General or miscellaneous 04. Solid Earth::04.06. Seismology::04.06.10. Instruments and techniques |
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 ~0.8 TECu after the shock moment and disappears after it. The local TEC disturbance was confined at heights below 160 km, i.e. in the lower ionosphere. |
Appears in Collections: | Article published / in press |
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