STRANGE SOUNDS ARCHIVE · 2020
From meteor shockwaves and recovered meteorites to frost quakes, shallow earthquakes, coastal skyquakes and genuinely unresolved regional blasts, 2020 produced a remarkably diverse collection of mysterious boom reports.
This reconstructed archive documents the most significant mystery booms, skyquakes, meteor sonic booms, earthquake sounds, frost quakes and unexplained rumblings reported worldwide in 2020. Routine military exercises, industrial explosions, demolitions and weak repetitive reports have been removed.
Archive year: 2020 · Updated:
Key facts — Mystery Booms 2020
- Meteors caused several of the best-documented booms of the year. Major cases occurred over New York, Sweden, Idaho and Tennessee.
- Some explosion-like sounds came from earthquakes. Shallow earthquakes in East Tennessee and South Glens Falls, New York produced audible booms and rumbling.
- Extreme winter weather created frost-quake reports. The Quad Cities experienced explosive cracking during a period of bitter cold.
- Coastal mystery booms remained especially interesting. San Diego, Cape Fear and the Jersey Shore all produced widespread reports without a confirmed seismic source.
- Several major 2020 boom events remain unresolved, including disturbances around Grand Island, Washington, D.C., Saranac Lake and Australia’s Tomaree Peninsula.
What Were the Mystery Booms of 2020?
A mystery boom is a sudden explosion-like sound, pressure wave or rumbling disturbance whose source is not immediately obvious.
It is a description of an observation — not a single scientific phenomenon.
A meteoroid traveling faster than sound can generate an atmospheric shockwave. A shallow earthquake can produce an audible crack or underground boom. Frozen ground can fracture suddenly during a cryoseism. Supersonic aircraft, blasting and industrial activity can create similar effects.
The challenge is that very different physical processes can sound almost identical to people on the ground.
Some reports can eventually be explained using seismic data, weather radar, satellite observations, meteor networks or official notices. Others remain unresolved because the disturbance was too brief or insufficiently instrumented.
For the broader science and history, visit the Mystery Booms & Rumblings Explained
hub.
How the 2020 Mystery Booms Are Classified
Instrumental, official or strong documentary evidence identifies the physical source.
One explanation is strongly supported, although some uncertainty remains.
The event is credibly documented, but the surviving evidence does not establish the source.
Available reports are too incomplete or contradictory for a reliable interpretation.
Unresolved does not mean paranormal.
It simply means that available observations are insufficient to identify the source confidently.
January 2020 Mystery Booms
JANUARY 2 · SARATOGA COUNTY, NEW YORK, USA
Bright Flash and Powerful Boom Reported Across Saratoga County
Residents across parts of Saratoga County reported a sudden bright flash followed by a powerful explosion-like boom strong enough to rattle windows and houses.
Contemporary reporting pointed toward an atmospheric meteor event as the most plausible explanation.
The combination of a visible flash, wide geographic footprint and delayed acoustic disturbance is consistent with the behavior of a meteoroid producing a sonic shockwave high in the atmosphere.
Status: LIKELY
JANUARY 15 · SAN DIEGO COUNTY, CALIFORNIA, USA
Mysterious Boom Shakes Coastal San Diego
Residents across coastal San Diego County reported an explosion-like boom accompanied by brief shaking.
No corresponding earthquake capable of explaining the disturbance was detected.
Possible explanations included offshore military activity, atmospheric propagation or a sonic boom, but no definitive source was publicly established.
Status: UNRESOLVED
JANUARY 15 · CAPE FEAR, NORTH CAROLINA, USA
Massive Mystery Booms Rock the Cape Fear Coast
Residents across parts of the Cape Fear region reported loud explosion-like booms strong enough to shake homes and prompt emergency calls.
The reports extended across multiple coastal communities.
No significant earthquake corresponded with the disturbance, and authorities did not identify a definitive source.
The event fits the historical pattern of unexplained coastal booms known in the Carolinas as Seneca Guns.
Status: UNRESOLVED
JANUARY 17 · ILLINOIS–IOWA, USA
Extreme Cold Produces Frost-Quake Booms Around the Quad Cities
Residents around the Quad Cities reported sudden loud cracks and explosion-like sounds during a period of intense winter cold.
The events were widely interpreted as cryoseisms, or frost quakes.
Cryoseisms can occur when water-saturated soil freezes rapidly, expands and fractures under stress.
Status: LIKELY
JANUARY 20 · EAST TENNESSEE, USA
Magnitude 3.8 Earthquake Produces Loud Booms Across East Tennessee
A magnitude-3.8 earthquake struck East Tennessee and was felt across a broad region.
Residents described loud booming and rumbling noises accompanying the shaking.
Shallow earthquakes can produce high-frequency seismic energy that reaches the surface as a sudden crack, bang or underground explosion-like sound.
Status: CONFIRMED
February 2020 Mystery Booms
FEBRUARY 13 · TOMAREE PENINSULA, AUSTRALIA
Shaking Boom Rattles Australia’s Tomaree Peninsula
Residents around the Tomaree Peninsula reported a strong boom accompanied by shaking.
The disturbance was heard across a broad area, but contemporary reporting did not identify a definitive earthquake, industrial event or other conventional source.
Status: UNRESOLVED
FEBRUARY 26 · JERSEY SHORE, NEW JERSEY, USA
Mysterious Booms Rattle Buildings Along the Jersey Shore
Residents across Atlantic and Cape May counties reported loud booms and brief shaking.
The disturbance triggered renewed speculation about offshore military activity, sonic booms and seismic sources.
No definitive source was established at the time.
Status: UNRESOLVED
March 2020 Mystery Booms
MARCH 12 · SOUTH GLENS FALLS, NEW YORK, USA
Small Upstate New York Earthquake Produces Explosion-Like Boom
A shallow earthquake near South Glens Falls produced a sharp boom and noticeable shaking across parts of upstate New York.
Many residents initially interpreted the event as an explosion because of its sudden, impulsive character.
Seismic data established an earthquake as the source.
Status: CONFIRMED
MARCH 15 · GRAND ISLAND, NEW YORK, USA
Mysterious Explosive Sounds Return to Grand Island
Residents of Grand Island again reported powerful unexplained booms strong enough to shake homes and attract local attention.
Some of the sounds were captured on residential surveillance systems.
Similar disturbances had already troubled the community during 2019, but no single source capable of explaining the recurring reports was established.
Status: UNRESOLVED
April 2020 Mystery Booms
APRIL 14 · WASHINGTON, D.C., USA
Single Powerful Boom Puzzles Northwest Washington
Residents across parts of northwest Washington reported a sudden loud explosion-like boom during the night.
The disturbance generated calls and neighborhood reports, but city officials did not immediately identify a source.
Without strong seismic, visual or industrial evidence, the event remains unresolved.
Status: UNRESOLVED
August 2020 Mystery Booms
AUGUST · SARANAC LAKE, NEW YORK, USA
House-Shaking Boom Rattles Saranac Lake
Residents around Saranac Lake reported a loud explosion-like boom capable of shaking homes.
Authorities investigated possibilities including local blasting and sonic events, but no definitive public explanation emerged.
Status: UNRESOLVED
November 2020 Mystery Booms
NOVEMBER 7 · SWEDEN
Spectacular Swedish Bolide Produces Thunderous Boom and Meteorite Fall
A brilliant fireball crossed Sweden during the evening of November 7, producing a powerful thunder-like boom and prolonged rumbling.
The event was observed widely and subsequently became far more scientifically significant when meteorites were recovered.
The fall represented Sweden’s first recovered meteorite from an observed fall in decades and an exceptionally strong example of a meteor producing audible atmospheric shockwaves.
Status: CONFIRMED
NOVEMBER 28 · WESTERN SWEDEN
Another Brilliant Bolide Produces Loud Bang Over Western Sweden
Only weeks after the November 7 meteorite fall, residents of western Sweden reported another intense flash followed by loud explosive sounds.
Astronomers identified the phenomenon as a bolide.
The timing of the visual observations and acoustic reports strongly supports a meteor-generated shockwave.
Status: LIKELY
December 2020 Mystery Booms
DECEMBER 2 · CENTRAL NEW YORK, USA
Daylight Fireball Explodes Over New York and Produces Sonic Boom
A spectacular daylight fireball crossed central New York shortly after noon on December 2.
The atmospheric event was visible across a large region and produced a loud sonic boom reported by numerous observers.
The fireball was independently detected from space, making it one of the strongest instrumentally documented meteor-boom events of 2020.
NASA analysis indicated that the meteoroid was traveling at tens of thousands of miles per hour before fragmenting high in the atmosphere.
Status: CONFIRMED
DECEMBER 10 · HENDERSONVILLE, TENNESSEE, USA
Bright Flash and Loud Boom Reported Across Hendersonville
Residents around Hendersonville, Old Hickory and nearby communities reported a bright flash followed by a powerful explosion-like boom.
The timing and eyewitness descriptions were consistent with an atmospheric meteor event.
Status: LIKELY
DECEMBER 11 · EAGLE, IDAHO, USA
Bright Flash and Loud Boom Over Eagle Likely Caused by Meteor
Residents around Eagle reported a bright flash accompanied by a loud explosion-like sound.
The combination of the visual event and delayed boom led investigators and local observers to favor a meteor explanation.
Status: LIKELY
What Caused the Mystery Booms of 2020?
| Cause | Major 2020 examples | Evidence |
|---|---|---|
| Meteors & bolides | Saratoga County, Sweden, central New York, Hendersonville, Eagle | Fireball observations, satellite detection, meteorite recovery and sonic-boom reports |
| Earthquakes | East Tennessee, South Glens Falls | Instrumentally recorded earthquakes coinciding with audible booms and shaking |
| Cryoseisms | Quad Cities | Extreme cold and explosive ground cracking consistent with frost quakes |
| Coastal / atmospheric disturbances | San Diego, Cape Fear, Jersey Shore | Broad acoustic reports without corresponding local seismic activity |
| Unresolved regional disturbances | Tomaree Peninsula, Grand Island, Washington, D.C., Saranac Lake | Credible reports but insufficient evidence to identify a single source |
The 2020 archive demonstrates why the phrase “mystery boom” should never be treated as a scientific diagnosis.
Meteors, earthquakes, frozen ground and atmospheric acoustics can all produce extremely similar reports: sudden bangs, shaking windows, vibration and brief pressure sensations.
The key to distinguishing them is independent evidence such as seismic records, satellite observations, radar, fireball reports and official activity logs.
The Science Behind the Mystery Booms of 2020
How Do Meteors Create Sonic Booms?
Meteoroids enter Earth’s atmosphere at speeds far greater than the speed of sound.
The incoming object compresses the surrounding atmosphere and generates shockwaves along its path.
When those pressure waves reach the ground, witnesses may hear a sharp explosion, double boom or prolonged rumbling.
Why Can a Meteor Boom Arrive Minutes After the Flash?
Light from a fireball reaches an observer almost immediately, while sound travels through the atmosphere at only a few hundred meters per second.
A meteoroid tens of kilometers above Earth may therefore disappear long before its shockwave reaches people on the ground.
A delay of tens of seconds or several minutes can be completely normal.
Can Meteor Shockwaves Shake Houses?
Yes.
Strong atmospheric pressure waves can vibrate windows, doors, walls and roofs and may sometimes couple into the ground strongly enough to be detected by sensitive seismic instruments.
Why Do Small Earthquakes Sometimes Sound Like Explosions?
Small shallow earthquakes can release strong high-frequency seismic energy close to the surface.
People near the source may hear a sudden crack or underground boom rather than experiencing a long rolling earthquake.
What Is a Frost Quake?
A cryoseism, commonly called a frost quake, can occur when water-saturated soil freezes rapidly.
As water expands during freezing, stress builds until frozen ground or rock fractures suddenly.
The resulting sound may resemble a gunshot, explosion or small earthquake.
Why Are Mystery Booms Common Along Coastlines?
Coastal areas frequently report unexplained booming sounds because several possible sources overlap there.
These include offshore aircraft, meteors, distant explosions, surf-generated acoustic energy, shallow offshore earthquakes and unusual atmospheric sound propagation.
The Carolinas have a particularly long history of unexplained coastal booms known as Seneca Guns.
How Can Sound Travel Farther Than Expected?
Temperature inversions and strong wind gradients can bend acoustic waves back toward Earth’s surface.
This process, known as atmospheric ducting, can allow distant explosions, aircraft noise and other low-frequency sounds to travel tens or even hundreds of kilometers.
The Most Important Mystery Boom Events of 2020
Several 2020 cases stand out because they either provide unusually strong scientific evidence or represent important classes of mystery-boom phenomena.
Sweden Meteorite Fall
A spectacular bolide followed by thunderous rumbling and later meteorite recovery makes the November 7 Swedish event one of the year’s strongest meteor-boom cases.
Central New York Fireball
The December 2 daylight meteor was observed across a broad region and independently detected from space, providing unusually strong confirmation of its atmospheric origin.
Cape Fear Seneca Guns
The January coastal disturbance shook homes across southeastern North Carolina without a corresponding earthquake, making it a classic modern Seneca Guns case.
San Diego Mystery Boom
A broad coastal boom with no corresponding earthquake continued San Diego’s long history of unexplained explosion-like disturbances.
East Tennessee Earthquake Boom
The January M3.8 earthquake demonstrates how real seismic events can initially be perceived as unexplained explosions.
Grand Island Recurring Booms
The return of unexplained explosive sounds around Grand Island extended a recurring mystery already documented during 2019.
How the Mystery Booms of 2020 Archive Was Reconstructed
The original Strange Sounds 2020 archive was assembled during the year from live reports and included everything from meteor booms and earthquakes to military exercises, known explosions and miscellaneous local reports.
This reconstructed version uses a much stricter retrospective standard.
- Only the most important or scientifically useful 2020 cases are retained.
- Events are organized by when they occurred, not when an article was published.
- Scheduled military training and bombing-range advisories are excluded.
- Known refinery, plant, ammunition-depot and industrial explosions are excluded.
- Known demolitions and infrastructure failures are excluded.
- Fireballs are included only when there is meaningful evidence of sound, pressure waves or shaking.
- Generic monthly mystery-boom compilations redirect to this archive rather than appearing as separate events.
- Later scientific explanations supersede early speculation.
- Meteorite claims are retained only when scientifically documented.
- Unresolved cases remain unresolved when available evidence does not support a specific explanation.
Some legacy Strange Sounds URLs may therefore redirect to this annual archive even though the original story is no longer represented by a separate visible timeline entry.
That is intentional: preserving URL equity and deciding editorial importance are two separate decisions.
What Was Removed From the Original 2020 Mystery Booms Archive?
The rebuilt archive deliberately excludes numerous incidents whose sources were already known or whose evidence was too weak to justify permanent inclusion.
Removed material includes military training at Quantico, Fort Benning, Fort Knox, Fort Carson, Aberdeen Proving Ground and other bases, as well as known bombing-range activity.
Known industrial and accidental explosions — including the Houston plant explosion, refinery and silo explosions, major ammunition-depot incidents and the Beirut port disaster — also do not belong in a mystery-boom archive.
Similarly, weak single-neighborhood reports and generic monthly compilations have been consolidated rather than preserved as separate cases.
This produces a smaller but substantially more useful historical record.
Mystery Booms 2020 — Frequently Asked Questions
What caused the mystery booms of 2020?
There was no single cause. Major 2020 cases were linked to meteor shockwaves, shallow earthquakes and frost quakes, while several coastal and regional disturbances remained unresolved.
What was the biggest meteor boom of 2020?
Several events were important. Sweden’s November 7 bolide produced thunderous sounds and an actual meteorite fall, while the December 2 Central New York daylight fireball was observed widely and independently detected from space.
Did meteorites fall in Sweden in 2020?
Yes. A brilliant bolide crossed Sweden on November 7, 2020, producing a loud atmospheric disturbance. Meteorites were subsequently recovered from the event.
What caused the December 2020 boom over New York?
A daylight meteor crossed central New York on December 2, 2020 and generated an atmospheric shockwave. The event was widely observed and independently detected by satellite.
What caused the Cape Fear mystery booms in January 2020?
No definitive source was established. The event occurred along a region with a long history of unexplained coastal booms known as Seneca Guns.
Can earthquakes produce loud booms?
Yes. Small shallow earthquakes can release high-frequency seismic energy that people near the source perceive as a crack, bang or underground explosion.
What is a frost quake?
A frost quake, or cryoseism, can occur when water-saturated ground freezes rapidly and fractures under stress, producing an explosive crack and localized vibration.
Why are mystery booms often reported near coastlines?
Coastal areas combine several possible sources, including offshore aircraft, meteors, distant explosions, shallow seismic activity, surf-generated sounds and atmospheric ducting.
Does unresolved mean a mystery boom was paranormal?
No. Unresolved simply means that the available evidence is insufficient to identify the physical source confidently. It does not imply paranormal activity or unknown physics.
Mystery Booms by Year
Report a Mystery Boom
Did you witness a loud unexplained boom, skyquake or unusual rumbling?
Useful reports include the exact location, local time, duration, direction of the sound, whether a flash or object was visible, whether windows or buildings shook and whether other witnesses experienced the same event.
