6:15 PM - 7:30 PM
[SSS31-P07] Gravity survey around the Medeshima Hills in the Sendai Plain, northeast Japan
Keywords:gravity survey, concealed active fault, subsurface structure, continuity of active fault
To reveal the continuity of northern extension of the concealed active fault, we executed gravity survey in the southern part of Sendai Plain, from Medeshima Hills to the right bank of Natori River. The total number of gravity stations is 232, using LaCoste & Romberg D-type gravimeter and G-type gravimeter. The interval of gravity stations is 200 m.
The result of our gravity survey shows no steep gradient of bouguer gravity associated with the concealed active fault in the northern area of Medeshima Hills, indicating that the active concealed fault is terminated in this area.