Summary: Use Windows PowerShell to find PowerShell related events and levels.

 How can I find events that are related to Windows PowerShell in the event and diagnostic logs, and see the level for those events?

 Use the Get-WinEvent cmdlet and a wildcard character for LogName, select the logname and level properties, and make it easy by filtering only Unique entries:

Get-WinEvent -LogName *powershell* | select logname, level -Unique