Abstract
A complex regional analysis of data obtained from GPS observations at ground-based satellite radio signal receiving stations for the largest (M 7.0) earthquake that occurred in the beginning of January 2010 on Haiti is carried out. The radio signal receiving stations jointly used in this work belong to two global networks (IGS and UNAVCO). A vast statistical data set spatiotemporal measurements, namely, more than 5 million of radio signal phase readings, has been processed. Differentiated software-algorithmic methods of processing satellite radio signal data allowed us to identify and consider the characteristics of the spatial and temporal scales of ionospheric irregularities. Using geophysical analysis, the detected inhomogeneous structures of the ionosphere are referenced to the topographical map of the area. Statistical characteristics of the deviations and distributions of the distinguished ionospheric structures from boundaries of the lithospheric plates are calculated. The seismic events were developed under quiet geomagnetic conditions and the absolute value of the Dst index did not exceed 20 nT, which made it possible to consider ionospheric manifestations of atmosphere–lithosphere interactions during the monitoring period. To make the geophysical analysis reliable, data of the updated digital model of lithospheric plate boundaries are used.
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ACKNOWLEDGMENTS
We are grateful to the Dept. of Atmosphere Physics, Moscow State University, for the possibility of using the CRASS GPS application program package.
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Translated by A. Nikol’skii and M. Titova
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Titova, M.A., Zakharov, V.I. & Pulinets, S.A. Interpretation of Ionospheric Disturbances During the Largest Earthquake by the Using the Differentiated Approach for the Special Methods to Processing Satellite Radio Signals. Geomagn. Aeron. 62, 783–801 (2022). https://doi.org/10.1134/S0016793222060159
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DOI: https://doi.org/10.1134/S0016793222060159