Computer Science – Sound
Scientific paper
Feb 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011ge%26ae..51...71h&link_type=abstract
Geomagnetism and Aeronomy, Volume 51, Issue 1, pp.71-77
Computer Science
Sound
Scientific paper
On the basis of the 15-min data from a series of ground-based vertical ionospheric sounding stations, a study of variations of the foF2 critical frequency before the strong earthquake ( M = 6.3) that occurred on April 6, 2009 at L’Aquila (Italy) was carried out. The earthquake epicenter was located 85 km north-eastward from Rome. Approximately 20 h prior to the earthquake, a well-pronounced statistically significant effect of foF2 increase relative to the average background for magnetically quiet days was observed for almost 1.5 h at the Rome ionospheric station. In this case, at control stations distanced from the earthquake epicenter, no statistically significant deviations of foF2 from the background values were detected during the same observations period. This fact provides grounds for consideration of the foF2 increase observed at Rome station as a possible ionospheric precursor of this earthquake.
Georgieva Katya
Hegai V. V.
Kim Vitaly P.
Legen'ka A. D.
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