The United States Geological Survey and its network of seismometers have reported no significant earthquakes along the east coast within the last day – so earthquake activity is not likely the cause. The USGS would love to know what you felt and when you felt it.
Mystery Booms Rattle
North Carolina Since 1850s
By Jerry Allegood
Raleigh News & Observer
FORT FISHER, N.C. -- The sound rolls in off the ocean like an invisible tidal wave, washing over houses with enough force to rattle windows and startling people who look uneasily to the ground and to the sky for an explanation.
Boom. Rattle. Rattle boom. And it is over as quickly as it began.
The mysterious noises have been reported as far back as the 1850s.
Booms rattle Southeastern N.C. residents for second time in 24 hours
By Brian Freskos
Published: Saturday, November 6, 2010 at 7:09 p.m.
Last Modified: Saturday, November 6, 2010 at 7:09 p.m.
It happened again.
For the second time in less than 24 hours, Southeastern North Carolina residents were rattled by a mysterious pair of loud booms that shook them awake and rattled their homes.
No one seems to know for sure what is causing the noises. But dispatchers in New Hanover and Brunswick counties said they got multiple telephone calls around 10:30 a.m. Saturday from people wanting to know why their homes were shaking.
Wilderness & Resources
Mysterious booming sounds rattle N.C. windows and doors
Mudslides, meteors, earthquakes, tsunamis and explosive gas are all given as potential causes for the odd and intense noises.
By OurAmazingPlanet.comFri, Sep 16 2011 at 1:19 PM EST
Earthquake "booms" have been reported for a long time, and they tend to occur more in the Northeastern US and along the East Coast. Of course, most "booms" that people hear or experience are actually some type of cultural noise, such as some type of explosion, a large vehicle going by, or sometimes a sonic boom, but there have been many reports of "booms" that cannot be explained by man-made sources. No one knows for sure, but scientists speculate that these "booms" are probably small shallow earthquakes that are too small to be recorded, but large enough to be felt by people nearby.
Higher-frequency vibrations make the booming sound, and when quakes are deeper, those vibrations are gone by the time they reach the surface. Sometimes the quakes boom even when no vibration is felt.
but right now we don’t understand what makes them. However, they do not seem to pose a threat to anyone.