Rolland L. M., Vergnolle M., Nocquet Jean-Mathieu, Sladen A., Dessa J. X., Tavakoli F., Nankali H. R., Cappa F. (2013). Discriminating the tectonic and non-tectonic contributions in the ionospheric signature of the 2011, M(w)7.1, dip-slip Van earthquake, Eastern Turkey. Geophysical Research Letters, 40 (11), p. 2518-2522. ISSN 0094-8276.
Titre du document
Discriminating the tectonic and non-tectonic contributions in the ionospheric signature of the 2011, M(w)7.1, dip-slip Van earthquake, Eastern Turkey
Année de publication
2013
Auteurs
Rolland L. M., Vergnolle M., Nocquet Jean-Mathieu, Sladen A., Dessa J. X., Tavakoli F., Nankali H. R., Cappa F.
Source
Geophysical Research Letters, 2013,
40 (11), p. 2518-2522 ISSN 0094-8276
It has previously been suggested that ionospheric perturbations triggered by large dip-slip earthquakes might offer additional source parameter information compared to the information gathered from land observations. Based on 3D modeling of GPS- and GLONASS-derived total electron content signals recorded during the 2011 Van earthquake (thrust, intra-plate event, M-w=7.1, Turkey), we confirm that coseismic ionospheric signals do contain important information about the earthquake source, namely its slip mode. Moreover, we show that part of the ionospheric signal (initial polarity and amplitude distribution) is not related to the earthquake source, but is instead controlled by the geomagnetic field and the geometry of the Global Navigation Satellite System satellites constellation. Ignoring these non-tectonic effects would lead to an incorrect description of the earthquake source. Thus, our work emphasizes the added caution that should be used when analyzing ionospheric signals for earthquake source studies.
Plan de classement
Sciences fondamentales / Techniques d'analyse et de recherche [020]
;
Géologie et formations superficielles [064]
Description Géographique
TURQUIE
Localisation
Fonds IRD [F B010060530]
Identifiant IRD
fdi:010060530
