There is a relatively new global seismological reporting system, with sensing stations all over the place. If you are so inclined, you can access all kinds of info through the USGS site linked above. Interested parties may elect email notifications of global seismic activity, though you have to keep on top of it, or it fills your mailbox up pretty quickly (or so I hear;-)--

There are definitely periods of greater and lesser activity(like over the past few months), but even on a slow day, there are always a couple good quakes. Vanuatu alone usually has at least a couple quakes every day--and the fishing is great there too!