Coastal West as well. Maybe 100 miles inland maximum.
We had one with Mount St. Helens’ pyroclastic eruption back in 1980. But that was in the Northwest. Much of the Pacific Northwest is on the Ring of Fire too; lots of other volcanoes there that could blow at any time, particularly Mount Hood, Mount Rainier and Mount Baker. Mount Lassen in California last erupted in 1915.
IIRC, the Watchung Mountains in NJ are of volcanic origin, with several old lava flows visible, but haven’t erupted in many millennia. If the Ramapo Fault becomes more active, anything could happen there, though.