How to best reproduce this blur effect

[celined1845719]

Hi,

I have been using a shape (rectangle, ellipse etc), creating a smart object and then applying gaussian blur but I am not able to reproduce something similar to the blur effect on the left of the first image. The second image shows what I have been doing. Many thanks for your help

[Guest]

Hi

Is this what you're looking to achieve

[celined1845719]

Hi, thanks for your help. I'm trying to reproduce the same effect under the logo of the first photo. The white blurry part. Do you think it might just be a white brush with low opacity and then some gaussian blur over it?