Very easy results down 35cm in snowpack tests showing potential to propagate on a buried surface hoar layer (10mm) on top of a crust.
Snowpack
35cm of new snow with a small crust(1cm) 10cm down within the storm snow.
Down 35cm is a crust with well formed surface hoar on top.
Another crust 10cm thick and breaking down is 60cm down.
Lower snow pack is still quite soft with very little structure.