Here is the calculation made by Shinji Toda before the M=7 shock struck, indicating that the Hinagu Fault to the southwest, and the Futagawa Fault to the northwest, were brought closer to failure by the M=6.1 shock (now identified as M=6.2). Parts of both faults subsequently ruptured.

Here is the calculation made by Shinji Toda before the M=7 shock struck, indicating that the Hinagu Fault to the southwest, and the Futagawa Fault to the northwest, were brought closer to failure by the M=6.1 shock (now identified as M=6.2). Parts of both faults subsequently ruptured.

Here is the calculation made by Shinji Toda before the M=7 shock struck, indicating that the Hinagu Fault to the southwest, and the Futagawa Fault to the northwest, were brought closer to failure by the M=6.1 shock (now identified as M=6.2). Parts of both faults subsequently ruptured.