Active and passive surface wave methods estimated 1D Vs profiles at the Portuguese Bend Landslide. We carried out single station 3C microtremor measurements at 10 sites, and active and passive surface waves were measured at three sites, two sites on sliding body and one site outside of the landslide. Active method used a linear array of 90 m consisting of 12 geophones. Passive method used a 90 m linear array or a 45 m L-shaped array consisting of 12 geophones. Active and passive dispersion curves were combined and 1D Vs profiles down to 100 m deep were estimated. There are clear H/V peaks between 1 and 10 Hz inside of the landslide whereas there are no clear peaks outside of the landslide. Phase velocities obtained inside of the landslide were clearly lower than those outside of the landslide. At the outside of the landslide, Vs rapidly increased and reached 700 m/s, that can be considered as flesh Miocene bedrock, at approximately 20 m deep. In contrast, there were thick low velocity layers with Vs of 200~650 m/s inside of landslide. Depth to the fresh Miocene bedrock appeared to be approximately 80 m deep at those sites.