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Ionospheric density variations recorded before the 2010 Mw 8.8 earthquake in Chile

SYSNO ASEP	0368908
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Ionospheric density variations recorded before the 2010 Mw 8.8 earthquake in Chile
Author(s)	Píša, David (UFA-U)_{RID, ORCID} Parrot, M. (FR) Santolík, Ondřej (UFA-U)_{RID, ORCID}
Source Title	Journal of Geophysical Research - ISSN 0148-0227 Roč. 116, - (2011), A08309/1-A08309/8
Number of pages	8 s.
Language	eng - English
Country	US - United States
Keywords	DEMETER satellite ; pre-seismic activity ; Offshore Bio-bio earthquake
Subject RIV	BL - Plasma and Gas Discharge Physics
R&D Projects	ME09107 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
CEZ	AV0Z30420517 - UFA-U, BC-A (2005-2011)
UT WOS	000294128700001
DOI	10.1029/2011JA016611
Annotation	The paper presents a study of plasma density variations observed by the DEMETER spacecraft in the vicinity of a very powerful earthquake in Chile. This earthquake of moment magnitude 8.8 occurred on 27 February 2010 with an epicenter located at 35.85°S, 72.72°W. Data recorded 10–20 days before the main shock along orbits close to the future epicenter show increasing plasma densities. A statistical analysis with DEMETER data has been performed using the first 3 months of the years 2007–2010 to monitor density variations in the vicinity of the epicenter at the same local time and seasonal conditions. This analysis shows that a large increase of the plasma density is very uncommon at this location and at this time and that the increases observed during the days before the main shock could be considered as possible short-term precursors of this powerful earthquake.
Workplace	Institute of Atmospheric Physics
Contact	Kateřina Adamovičová, adamovicova@ufa.cas.cz, Tel.: 272 016 012 ; Kateřina Potužníková, kaca@ufa.cas.cz, Tel.: 272 016 019
Year of Publishing	2012
Electronic address	http://www.agu.org/pubs/crossref/2011/2011JA016611.shtml

Number of the records: 1