|
| | Abstract | | During the 2011 off the Pacific coast of Tohoku Earthquake (Mw 9.0), large ground motions for a period of 1.5 to 5 seconds were observed in the Tokyo Bay area of Shinagawa to Kawasaki. Especially near the coast of Tokyo Bay, velocity responses of larger than 100 cm/s were observed for a period of 2 to 3.5 seconds. To understand S-wave velocity profiles, therefore, we carried out array microtremor observations at 6 sites in this area. As a result, thick soft-soil deposits with S-wave velocity of Vs 150 m/s and Vs 400 m/s were estimated in the Tokyo Bay of Shinagawa to Kawasaki. |
|
|
|
| |
|