That sounds like it could have been a reinforced concrete surface?
... which could be the source of the magnetic interference.
The first indications of the collision are in the pitch, roll and yaw data from 11.9 seconds.
But the compass starts...
It's always easier with a short description of what happened or what you observed.
But here's what I make from the data.
It looks like you launched (without waiting for GPS or to have the drone record a home point) and climbed to about 15 feet...
Hi~
Pilot error? yes and no....
Yes:
the pilot took off his drone with several high risk element: gas station (I assume with cars and flammable fuel there), no GPS when take off, narrow initial airspace to confirm the status of the drone...