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This research uses Principal Component Analysis (PCA) to investigate global ionospheric integrated electron content map (GIM) anomalies corresponding to Japan’s Iwate-Miyagi Nairiku earthquake on 13 June 2008 (UT) (M j = 7.2, JMA scale). The PCA transform is applied to GIMs for 20:00 to 22:00 on June 08, 11 and 12, 2008 (UT). To perform the transform, image processing is used to subdivide the GIMs into 100 (36° long. and 18° lat.) smaller maps to form transform matrices of dimensions 2 × 1. The transform allows for principal eigenvalues to be assigned to ionospheric integrated electron content anomalies. Anomalies are represented by large principal eigenvalues (i.e., >0.5 in a normalized set). The possibility of geomagnetic storms and solar flare activity affecting the results is done through examining the D st index for corresponding days. The study shows that for the Iwate-Miyagi Nairiku earthquake, PCA possibly determined earthquake related ionospheric disturbances for the whole region, including the epicenter.

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the Neogene Shirahama Group, south Izu, Japan . – Journal of Volcanology and Geothermal Research , 37 , pp. 59 – 75 . Király , E. 1989 : A Bükk hegység ÉNy

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distribution in salt uptake, damage, and predicting salt susceptibility of eight types of Japanese building stones . – Engineering Geology , 115 , pp. 226 – 236 . Zhang , L

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of Jurassic sandstone in the Mino Terrane, Central Japan: Th-U-total Pb evidence from an electron microprobe monazite study. - Sedimentary Geology, 75, pp. 141-147. Middle Precambrian provenance of Jurassic sandstone in the

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. Hirata, T., 1989: Fractal dimension of fault system in Japan: fracture structure in rock fracture geometry at various scales. - Pure Appl. Geophys., 131, pp. 157 - 170 . Fractal dimension of fault system in Japan: fracture

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soils horizons from Japan. Part 1. Effect of soil types. - Water, Air, and Soil Pollution, 124, pp. 1-21. Vertical distributions of trace metals in natural soils horizons from Japan Part 1. Effect

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M. Nedachi 1981 Electron probe study of Ti-rich hydroandradites in the Sanbagawa metamorphic rocks Japan Association of Mineralogists, Petrologists and Economic Geologists

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, Mantle Wedge and Crust to the Origin of Quaternary Lavas in the NE Japan Arc. Jour. Pet. 47/ 11 2185 2232 . I

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Matsumoto, R. 1992: Diagenetic dolomite, calcite, rhodochrosite, magnesite and lansfordite from Site 799, Japan Sea -- Implications for depositional environments and the diagenesis of organic-rich sediments. -- Proceedings of the Oceanic Drilling Program

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proposed by the earthquake prediction research group of Japan . — Proc . U.S. Japan Conf. Res. Rela. Earthquake Prediction Probl., pp . 10 – 12 . Z. Han

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