The Mystery Bonus Hour happens today!
Pokemon GO is hosting a Mystery Bonus Hour today! During this hour you will see a 2x Raid Experience bonus!
The 2x Raid Experience Bonus will last from 6pm to 7pm in your local timezone.
The Mystery Bonus Hour is an experimental event that Niantic is trying for Pokemon GO. If it proves popular then we may see more of these events in the future.
Best of luck in your catches!