Observed Lightning icon

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 32 32" width="24" height="24"><path fill="currentColor" d="m15.67 24l-1.736-1l2.287-4h-3.889l3.993-7l1.737 1l-2.284 4h3.89l-3.998 7z"/><path fill="currentColor" d="M4 18A12 12 0 1 0 16 6h-4V1L6 7l6 6V8h4A10 10 0 1 1 6 18Z"/></svg>