Are Skyquakes Real?

iStock
iStock

by Alex Carter

In 2012 YouTube was inundated with videos of a very rare atmospheric phenomenon—the skyquake. Skyquakes are characterized by unexplained noises coming from the sky, often in remote areas with no obvious explanation as to the source of the sound. Skyquakes have been recorded all over the world, and in every case, the sky suddenly takes on a creepy hue and emits unsettling, unnatural noises.

The reason it’s easy to say that it was 2012 is because they were all uploaded to the same YouTube channel, skyquake2012, a channel that specialized in taking shaking, amateur phone footage and adding the creepy trumpet sound from Kevin Smith’s Red State movie. In other words, they were all hoaxes.

But the phenomenon itself is no hoax. A skyquake is a real event that has been documented for centuries.

It’s difficult to distinguish between fakes, videos of unexplained noises that are of human origin, and genuine skyquakes, but the real examples of this phenomenon are all described the same way by those who experience them: a loud boom that sounds like distant cannon fire. Weirdly, the genuine ones all occur near coastal areas.

No one has been able to fully explain why certain areas experience periodic skyquakes, but enough evidence exists to suggest these are real phenomena and that the residents of these areas aren't making up stories. The fact that there are words to describe the event in different languages lends further credibility. In Japan they are called uminari (海鳴り, "the rumbling of the sea"); in Dutch, "mistpoeffers"; and in parts of the U.S., "Seneca Guns."

Some skyquakes are said to have human origins, like when a military aircraft breaks the sound barrier—by the time the sonic boom is heard, the plane is no longer in sight. But that doesn’t explain any that were recorded before the invention of aircraft, which means there must be other explanations. One popular theory is that the sound is due to meteorites exploding in the upper atmosphere, although that raises the question as to why the bright flash accompanying the explosion isn’t more visible. Others suggest the noise may be due to thunder from storms over the horizon, which is plausible only if you don’t know what thunder sounds like.

The most likely explanation is that the Earth is passing gas. (Really!) The sound of gas escaping from underground vents would resemble a quiet volcano, or distant explosions, which would explain not only the sound, but why the sounds are pretty much only heard in coastal areas. Many of the vents weak enough to allow gas out would be underwater, and in many cases the gas may be due to decaying biomatter at the bottom of the lake. The gas could also be escaping from underwater caves that are collapsing.

All of this is to say, if you ever hear an unexplained explosion, rest assured that it was only the Earth. But for fun, you can still blame it on the dog.

Lake Michigan Has Frozen Over, and It's an Incredible Sight

Scott Olson, Getty Images
Scott Olson, Getty Images

A polar vortex has brought deadly temperatures to the Midwest this week, and the weather is having a dramatic effect on one of the region's most famous features. As the Detroit Free Press reports, parts of Lake Michigan have frozen over, and the ice coverage continues to grow.

The Lake Michigan ice extent has increased rapidly throughout January, starting around 1 percent on the first of the month and expanding to close to 40 percent by the end of the month. Yesterday was the coldest January 30 in Chicago history, with temperatures at O'Hare Airport dropping to -23°F. Even though it's frozen, steam can be seen rising off Lake Michigan—something that happens when the air above the lake is significantly colder than the surface. You can watch a stream of this happening from a live cam below.

Lake Michigan's ice coverage is impressive, as these pictures show, but it's still far from breaking a record. Though Lake Michigan has never frozen over completely, it came close during the winter of 1993 to 1994 when ice reached 95 percent coverage.

Midwestern states like Wisconsin, Michigan, Illinois, and Indiana aren't the only places that have been hit hard by the cold this winter. At the United States/Canada border, Niagara Falls froze to a stop in some spots, a phenomenon that also produced some stunning photographs.


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[h/t Detroit Free Press]

Why You Need to Keep Your Car's Gas Tank Full in Cold Weather

iStock.com/Chalabala
iStock.com/Chalabala

Schools, trains, and the U.S. Postal Service have shut down this week as a polar vortex brings negative double-digit temperatures to the Midwest. Even if residents won't be doing much traveling as long as the dangerous weather persists, they'd benefit from keeping a full tank of gas in their cars: According to the Detroit Free Press, it's an easy way to prevent fuel lines from freezing.

One common reason cars struggle to start in cold weather is blocked-up fuel lines. These tubes are thin, and if there's any moisture in them when temperatures drop to extreme levels, they can freeze, causing blockages that prevent fuel from flowing.

Gasoline, on the other hand, doesn't freeze as easily. It maintains its liquid state in subzero temperatures, like those currently hitting parts of the U.S., so when a gas tank is full, those fuel lines are better equipped to handle to the cold.

If you filled up your tank before the recent cold snap and your car still won't start, it may have something to do with your antifreeze levels. Your car's radiator needs water to work properly, and antifreeze is what keeps the water liquid when temperatures dip below 32°F.

Of course, if temperatures have already dropped to dangerous levels in your area, it's not worth it to drive to the gas station to refuel or run out to stock up on antifreeze. Instead, keep these car maintenance tips in mind for the next time an arctic blast rolls in to town. And when it is safe enough to drive again, resist heating up your engine in the driveway: Letting your car idle in the cold can actually shorten the engine's lifespan.

[h/t Detroit Free Press]

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