Seeding the ocean with pressure sensors to detect tsunamis before they strike can be expensive and time consuming. But it might be possible to fill in gaps in the sensor network using existing communications cables.
Researchers at the National Oceanic and Atmospheric Administration and the University of Colorado have developed computer models that show that the displacement of sea water during a tsunami generates electrical voltage as it moves through the earth’s magnetic field (it’s the same principle by which a magnet moving past a coil in a dynamo generates electricity). The models suggest the voltage produced in underwater cables would be about 500 millivolts, large enough to detect. The voltage is created in the copper wires that typically accompany fiber optics, says Manaj Nair, the research scientist at NOAA and the University of Colorado, who led the work.
A Roomba recorded a woman on the toilet. How did screenshots end up on Facebook?
Robot vacuum companies say your images are safe, but a sprawling global supply chain for data from our devices creates risk.
A startup says it’s begun releasing particles into the atmosphere, in an effort to tweak the climate
Make Sunsets is already attempting to earn revenue for geoengineering, a move likely to provoke widespread criticism.
10 Breakthrough Technologies 2023
These exclusive satellite images show that Saudi Arabia’s sci-fi megacity is well underway
Weirdly, any recent work on The Line doesn’t show up on Google Maps. But we got the images anyway.
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