- News Home
17 April 2014 12:48 pm ,
Vol. 344 ,
Using the two high-quality genomes that exist for Neandertals and Denisovans, researchers find clues to gene activity...
A new report from the Intergovernmental Panel on Climate Change (IPCC) concludes that humanity has done little to slow...
Astronomers have discovered an Earth-sized planet in the habitable zone of a red dwarf—a star cooler than the sun—500...
Three years ago, Jennifer Francis of Rutgers University proposed that a warming Arctic was altering the behavior of the...
Officials last week revealed that the U.S. contribution to ITER could cost $3.9 billion by 2034—roughly four times the...
An experimental hepatitis B drug that looked safe in animal trials tragically killed five of 15 patients in 1993. Now,...
- 17 April 2014 12:48 pm , Vol. 344 , #6181
- About Us
ScienceShot: Are Major Earthquakes Linked?
2 August 2012 12:44 pm
Two of the six largest quakes since 1900—the magnitude-8.8 temblor that rocked Chile in February 2010, and the 9.0 quake that slammed Japan in March 2011 (damage shown)—occurred just 13 months apart. What's more, a group of four major shocks around the Pacific Rim in the early 1960s occurred within the span of 57 months. Coincidence? Probably, say researchers who analyzed the spacing of temblors with a magnitude of 8.3 or greater that occurred from 1900 through 2011. The chance of two such quakes occurring within 1 year of each other was 9.5%, the researchers report today in the Bulletin of the Seismological Society of America. That's about the same chances of duplicating any particular arrangement of quakes, the researchers say—even a pattern with widely scattered shocks that isn't particularly remarkable. After comparing the actual pattern of temblors in the past 111 years with hundreds of patterns generated by three different statistical distributions, the team says there's no compelling evidence that major quakes are linked. So next time a big quake happens somewhere in the world, rest easy: It doesn't bode ill for your local fault zone.
See more ScienceShots.