This map of all the world's recorded earthquakes between 1898 and 2003 is stunning. As you might expect, it also creates a brilliant outline of the plates of the Earth's crust—especially the infamous "Ring of Fire" around the Pacific Plate.
But the real story—which Smithsonian points out and which was also the first thing I noticed—lies elsewhere. To put it colloquially: Holy shit, you guys, look at all those intraplate earthquakes!
Plate tectonics explains a lot of things, but it doesn't totally explain why earthquakes (and, in rare cases, extremely large earthquakes) happen in places far from the meeting point of two pieces of crust. There are a few possible explanations out there. We just don't know yet which one is correct.
One of the theories explaining intraplate earthquakes is based off the fact that the tectonic plates we know today have not been constant throughout Earth's history. Some of the places that are now "intraplate" were once right along fault lines. Others are at spots where continents began—and then failed—to split apart. All these things might leave behind spots of "weak" rock that's more prone to upheaval than the strong, intraplate rock around it. Studies in the 1990s found that 49% of all intraplate earthquakes happen near places like this. Of course, that leaves 51% of the shaking still unexplained.
Read more about this and other theories for why intraplate earthquakes happen.
Check out Smithsonian's write up, which includes a nice comparison between this image and a cartoon map showing the tectonic plates.
View the image, created by data visualizer John Nelson, on Flickr
More than 800 American energy and Earth science researchers have signed a letter to Donald Trump outlining six steps they’re urging him to take to address human-caused climate change to protect “America’s economy, national security, and public health and safety.” The letter is accompanied by a public change.org petition to “Tell Trump To #ActOnClimate.” Here […]
James Delingpole is an invective-hurling anti-climate science columnist who has candidly admitted that he doesn’t bother to read scientific papers, calling himself a “an interpreter of interpretations.”
Kratom (previously) is a widely used herb that has been very effective in treating opioid withdrawal and other chronic, hard-to-treat conditions — it also became very controversial this year because the DEA decided, without evidence, to class it as a dangerous drug, and then changed its mind (unprecedented!) after a mass-scale petition that included interventions […]
These days, there’s definitely no shortage of touchscreen gloves available, but the key is finding ones that consistently work well. These iGloves Touchscreen Gloves are super reliable, and are on sale for just $11.99.Super comfortable and functional, these gloves will keep your hands warm and still let you use any touchscreen, from phones to tablets. The iGloves’ […]
The Black Friday Mac Bundle 2.0 is one of the Boing Boing Store’s best-selling Mac bundles yet, and it’s about to come to an end. If you don’t get your copy now, here’s what you’ll be missing:This bundle comes packing 9 top-rated Mac apps in one package, at the hugely discounted price of just $23.99. […]
The Boing Boing Store’s Gift Guide is full of ideas for pretty much anyone in your life like hipster ice cub trays, Xbox controllers, Halo Boards, and even diamond necklaces. As always, all products in the Boing Boing Store come at great discounts, too. Shop by price bucket starting at under $20. Under $20:Bloxx Jumbo Ice Trays […]