On neighborhood Facebook groups, West Roxbury, Roslindale, Hyde Park and Jamaica Plain residents report being startled awake either shortly before or after 5 a.m. by at least two loud booms. On Twitter, Pete Cannon reports:
Two separate loud bangs, one right after the other, heard from near Fallon Field.Think it was around 5:20-5:30 AM.
On the Roslindale Message Board, one resident reported seeing "a professional grade, show quality illegal mortar" shot off at Fallon Field in Roslindale.
City Councilor Matt O'Malley, though, adds that it wasn't just Fallon Field:
Spoke with @bostonpolice, it was indeed fireworks. They believe someone was driving around SW Boston setting them off (which would explain the different times & different n’hoods).
It was someone driving around and lighting fireworks off. I heard the whole thing go down on the BPD radio channel.
Gareth K reports:
Yes! heard them over the course of a couple hours at different distances. One was really loud near us (Hynes field).
R. Davis reports:
Yes, heard them a couple times during the night. I live near the monument in JP and they sounded really close, but my guess was that it could’ve been related to blasting work on the Arborway project.
AlderFish reports hearing booms more like 2:30 a.m.
Roslindale Mystery Booms of 2012.