Fig. 10

Eigenvectors of the gravity gradient tensor on the profile shown in Fig. 7. The maximum eigenvector and minimum eigenvector are indicated by red and blue, respectively. The dips of eigenvectors are given clockwise from x-axis to z-axis. Since it is known that the Kurehayama Fault is a reverse fault, we focus on the minimum eigenvector of the tensor. The “Kurehayama Fault” shown in this figure indicates a tentative fault location in Toyama City (Toyama City 2013). The average dip of the minimum eigenvector in the Kurehayama Fault zone shown by a rectangle with dashed lines is about 138°, and this angle indicates that the Kurehayama Fault would be a reverse fault of 42°. In addition, the maximum eigenvectors on the right side of the “Kurehayama Fault” shown in this figure point to the vertical direction, and the minimum eigenvectors in the left side of the “Kurehayama Fault” point to the vertical direction