Detection of Ionospheric Disturbances above the Haiti Region on January 1–15, 2010, according to GPS Data Obtained in Quiet Geomagnetic Conditions

Аннотация

The ionospheric disturbances detected during large earthquake over the region of Haiti on January 12, 2010 on the base the analysis of data GPS-observations are considered in this paper. A complex regional analysis of data from ground stations aggregated in global (IGS and UNAVCO) networks is carried out. Data from 67 ground stations for the period of January 1–15, 2010 was used. More than 7.5 thousand hours of observations were processed. Certain sources of seismic events that are considered possible sources of the revealed inhomogeneous wave structures of the ionosphere are localized. It is found that the selected cases response at ionospheric heights should be opened as a superposition of different processes along with that the ionospheric plasma may be additionally turbulized by a cycle of weaker earthquakes over seismically active regions. Due to the above statements, as well as aftershocks in the monitoring region, the analysis of the wave spectrum slope of ionospheric irregularities shows the availability of a local extreme 5 to 6 h on January 13, 2010. The seismic events evolved in quiet geomagnetic conditions, which made it possible to study ionospheric manifestations of the atmosphere–lithosphere relationships during the examined period.