04-23-2014, 11:36 AM
There has been a lot of seismicity for at least many years north of the Virgin Islands and Puerto Rico, with swarms of up to M3s, sometimes a few 4s. The pattern of quakes today and yesterday seems a bit different, with a broad arc of quakes. Parts of the arc of quakes are in clusters. I've long been curious how the long-term behavior compares to other (oblique) subduction zones. Alaska-Aleutians seems different. Cascadia is completely different (few quakes). And, the USGS site only reports M4.5+ quakes in non-USA parts of the world (and some unusual or "significant" quakes).
Chris
Chris