In addition to project-specific events (such as risks and issues), you can view all events by type across the current active portfolio (as determined by your Global Filter Settings).
To do this, go to Projects-->Events. You will be presented with the below screen.
Note that on the left, you can select the type of event, and you'll see all the events of that type by project.
For more on editing events, see Project Events, Risks, and Issues.