Symbol 0228 from ISO 7000 - Title/Meaning: Disturbance 
Function/description: To indicate a disturbance in the proper run of a procedure (for example, on luminous displays on enunciator relays).
Own work using: iso.org/obp/graphics/grs/df059a7e-ba1d-4913-851a-cd1ea5f2a58b 200.png
Vectorization:  Mrmw