3. Results and Discussion
Figure 3 shows the horizontal displacements at the summit
peaks of the mountain chain with respect to Kamikawa, and
the horizontal strain evaluated. Horizontal displacements
at Kurodake, Hakuundake, and Asahidake are as much as
2.6 cm (N10◦E), 2.5 cm (N22◦W), and 1.3 cm (N21◦E) in
this period, respectively. Principal strains are −5.46 × 10−6
(compression directing N56◦W) and 2.38×10−6 (extension
directing N34◦E) in this area.
The amount of deformations seems to be too large. Since
this result has been obtained from the measurement in a
relatively-short time-duration of three hours and in one year
interval, the precision of the measurement will be improved
by the repeated survey in the future. Considering the magni-