Title :
Dynamics and structure of the vertical ionospheric disturbances caused by Tohoku earthquake according to Irkutsk bistatic CHIRP-sounding
Author :
Berngardt, O.I. ; Podlesny, A.V. ; Kotovich, G.V.
Author_Institution :
Sibirean Branch, Inst. of Solar-Terrestrial Phys., Irkutsk, Russia
Abstract :
In the work we present results of observation of the mid-scale vertical ionospheric irregularities caused by Tohoku earthquake (11/03/2011, 05:47UT) at distance 3400km from epicenter with 1 minute temporary resolution. Their spatial and temporary dynamics is also investigated. As showed the analysis of the experimental data, the main response of the ionosphere was observed at Irkutsk from 06:10UT to 07:00UT. Short-term variations of the electron density profile were also observed from 06:00UT. This corresponds to the main horizontal speed of disturbances about 4, 2-2.5 and 1.2-1.3 km/s. The vertical scale of the irregularities was 10-20 km. Irregularities practically weren´t observed at heights above 180200km.
Keywords :
earthquakes; ionospheric disturbances; ionospheric techniques; AD 2011 03 11; Irkutsk bistatic CHIRP sounding; Tohoku earthquake; distance 3400 km; disturbance horizontal speed; midscale vertical ionospheric irregularities; spatial dynamics; temporal dynamics; vertical ionospheric disturbance dynamics; vertical ionospheric disturbance structure; Chirp; Earth; Earthquakes; Global Positioning System; Ionosphere; Spatial resolution;
Conference_Titel :
General Assembly and Scientific Symposium (URSI GASS), 2014 XXXIth URSI
Conference_Location :
Beijing
DOI :
10.1109/URSIGASS.2014.6929824
