Micro-quakes like the one you are describing are perfectly normal, but random in occurrence. So an up tick in activity doesn't mean anything and I can 100% guarantee it is NOT due to drought. The US east coast lithosphere is a relatively cold, and brittle compared to the west coast so tiny quakes are more easily felt. No big deal really.
As far as large events, there are a few places with active magma chambers like Yellowstone in the US. Long Valley California is one of them, Cascade range in OR and WA. Anyway, earthquake activity varies from year to year in Yellowstone with some years pretty quiet and other more active. Chance of a large eruption appears very low. It kind of like it could happen tomorrow or not for hundreds or thousands of years. Again I wouldn't worry about it.
Finally, world wide earthquake activity isn't increasing but fits well into the historical range of activity. What has changed is our reporting of earthquakes etc, They make good news/entertainment value so we here more about it. Also there may be more activity around places with better media coverage but that is again part of the random nature to these events. Over time the activity may just happen to occur a bit more often in places with less media coverage, although those places are becoming fewer as global media expands.