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Variabilities in the solar wind cause disturbances throughout the heliosphere on all temporal and spatial scales, which\udleads to changeable space weather. As a view of space weather forecasting, in particular, it is important to know direct and\udindirect causes modulating the space environment near the Earth in advance. Recently, there are discussions on a role of\udthe interaction of the solar wind with Mercury in affecting the solar wind velocity in the Earth’s neighborhood during its\udinferior conjunctions. In this study we investigate a question of whether other parameters describing the space environment\udnear the Earth are modulated by the inner planets’ wake, by examining whether the interplanetary magnetic field and the\udproton density in the solar wind observed by the Advanced Composition Explorer (ACE) spacecraft, and the geomagnetic\udfield via the Dst index and Auroral Electrojet index (AE index) are dependent upon the relative position of the inner planets.\udWe find there are indeed apparent variations. For example, the mean variations of the geomagnetic fields measured in the\udEarth’s neighborhood apparently have varied with a timescale of about 10 to 25 days. Those variations in the parameters\udwe have studied, however, turn out to be a part of random fluctuations and have nothing to do with the relative position of\udinner planets. Moreover, it is found that variations of the proton density in the solar wind, the Dst index, and the AE index\udare distributed with the Gaussian distribution. Finally, we point out that some of properties in the behavior of the random\udfluctuation are to be studied

Do Inner Planets Modulate the Space Environment of the Earth?