. Early geophysical papers of the Society of Exploration Geophysicists . Fig. 3.—Assumed structure in Suwa Basin. From the topography and the distribution of the corrected values of gradient and curvature, it seemed that the subterranean structure extends in the direction of the major axis of the basin. An assumed cross section is shown in Figure 3. By comparing the anomaly that arises from this assumed structure, which was computed from the following formula, the corrected observation values are obtained and the results are shown in Table III. Ui rJ~ 2 ff I pi - 2G0- \ sin 6 cos 8 log 1- sin2
. Early geophysical papers of the Society of Exploration Geophysicists . Fig. 3.—Assumed structure in Suwa Basin. From the topography and the distribution of the corrected values of gradient and curvature, it seemed that the subterranean structure extends in the direction of the major axis of the basin. An assumed cross section is shown in Figure 3. By comparing the anomaly that arises from this assumed structure, which was computed from the following formula, the corrected observation values are obtained and the results are shown in Table III. Ui rJ~ 2 ff I pi - 2G0- \ sin 6 cos 8 log 1- sin2 0(a2 — a{) > dg ( P2 A h 2Ga\ sin2 6 log — - sin 0 cos 0(a2 — <xi) f ds P\ Place of Sta 11 Akanuma 15 16 17 21 Jingugi 20 !9 6 Uga 4 5 722 TABLE III Gravity Anomalies Due to Structure Shown in Figure 3 No. Assumed Value Inclination Depth {Meters) 12 44' 313 12 44' 173 12 34 45° lorizontal Distance {Meters) Observed Value Calculated Value 275 447 1,010 i,327 1324 77-6 108. s 192 568 983 5°-4 72-5 308 900 i,Si9 ' 73-9
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