It is assumed that the possible peaks on the largest vertical extremely neighbouring electric fields, of 1.5 m - 2.0 m vertically from the flat ground, around large vertical lightning return strokes to the flat ground 10/350 mu S and 1/200 mu s are approximately in accordance with the numerically calculated peaks on the vertical extremely neighbouring electric fields, without taking into account the effect in the "rises on potential in surfaces of the Oat ground around lightning points" based on the electric fields owing to conductive current density within soil under the flat ground, around (10 m - 50 m horizontally from channels of large vertical lightning return strokes to the flat ground and 1.5 m - 2.0 m vertically from the flat ground) " large vertical lightning return strokes to the flat ground 10/350 mu s 200 kA in peaks and 1/200 mu s 100 kA in peaks on length of channels 2600 m and pulse grounding resistance of concentrated constant in lightning points 200 Omega, 600 Omega and 1800 Omega", respectively. in the numerical calculation of the peaks, the effect on the shields owing to "grounded large objects, raindrops, fogs and mists et al. between the sources on vertical extremely neighbouring electric fields around large vertical lightning return strokes to the flat ground 10/350 mu s 200 kA in peaks and 1/200 mu s 100 kA in peaks and the evaluation points" is neglected. The "possible levels on the harm at tops of brains owing to the maximum pulse energy density within brains induced by exposure of standing upright persons on the flat ground to the largest vertical extremely neighbouring electric fields around large vertical lightning return strokes to the flat ground 10/350 mu s and 11200 mu s" are approximately clarified as follows. The "Levell injuries at tops of brains represented by the great pain within wrists" owing to "the maximum pulse energy density at tops of brains induced by exposure of standing upright persons on the flat ground to the largest vertical extremely neighbouring electric fields around large vertical lightning return strokes to the flat ground 10/350 mu s and 1/200 mu s" aren't expected to be caused. The "Level 2 injuries at tops of brains represented by the pain within wrists" and "Level 3 incidents at tops of brains represented by the no perception within wrists" owing to "the maximum pulse energy density at tops of brains induced by exposure of standing upright persons on the flat ground to the largest vertical extremely neighbouring electric fields around large vertical lightning return strokes to the flat ground 10/350 mu s and 11200 mu s" are expected to be caused. Based on result of the studies relating to this studies, the "Level 4 disturbance of neural activity on nenrous system at tops of brines" and "Level 5 stimulation of axons on nenrous system at tops of brines" owing to "the maximum pulse conductive current density at tops of brains induced by exposure of standing upright persons on the flat ground to the largest vertical neighbouring electric fields around large vertical lightning return strokes to the flat ground" are expected to be certainly caused. If the persons (standing upright, sitting and lying persons et al.), with the extremely large field enhancement factors on the exposed extremely neighbouring electric fields around large lightning return strokes to the earth widely on upper surfaces of skulls k, on enough high grounded large objects (enough high grounded large structures, grounded large products, mountains, cliffs, hills and large rocks et al.) are exposed by the extremely neighbouring electric fields around the large lightning return strokes, the more serious injuries widely on the upper surfaces in the brains in the persons on the enough high grounded large objects can be expected to be caused. The establishment of criterions and performance of criterions in safety side on the regulation in the exposure of the persons to neighbouring electric fields around lightning return strokes to the earth, using the shields, physical restriction and warning notice et al. against the neighbouring electric fields around the lightning return strokes, taking into account the result in the evaluation in the "possible levels on the harm widely on upper surfaces of brains owing to the pulse conductive current density and pulse energy density induced by exposure of persons to neighbouring electric fields around lightning return strokes to the earth" of various precise possible condition and assumption and the result in the epidemiological investigation of "occurrence frequencies, taking into account levels of injuries, on the injuries widely on upper surfaces of brains owing to the pulse energy density induced by exposure of persons to neighbouring electric fields around lightning return strokes to the earth" are proposed.
