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At high tide, more water piles on top of geological faults, adding to the stress already there. If the fault is close to slipping, tides can trigger small tremors -- or, perhaps, larger quakes.

Ned Rozell
Along with increasing sea levels, melting glaciers are putting something else into the world’s oceans -- a huge load of organic carbon that could change marine ecosystems, says a newly published study by a team of mostly Alaska scientists.Yereth Rosen
What impact does warming Arctic water have on the movement of sea ice south each winter? That’s the question scientists with the new Sikuliaq research vessel are trying to answer on their trip out of Nome this October.Jenn Ruckel
Mastodon teeth from the University of Alaska Museum of the North and a group of current and former UAF paleontological personnel have helped solve a question that’s been puzzling scientists. Mike Dunham
Comet Lovejoy is at its peak brightness the next few weeks. Here's how to spot the comet, which will pass by Earth again in 8,000 years.Laurel Andrews
Alaska experienced a new high in the number of recorded earthquakes in 2014 -- 40,686, up from about 28,000 in 2013. Some of the increase is due to better monitoring, seismologists say, but some is simply because there was an uptick in seismic activity.Associated Press
Alaska’s tundra landscapes carpet a good portion of the state, from the North Slope to the elbow of the Alaska Peninsula. Researchers say it's slowly sinking in places -- as much as a fifth of an inch each year.Ned Rozell
A new approach to measuring methane leaks revealed that the Boston area alone lost enough natural gas during one year to fuel 200,000 homes.Pete Spotts
Altogether, the 1946 tsunami killed 159 people in Hawaii, drowned a swimmer in Santa Cruz, banged up fishing boats in Chile and wrecked a hut on Antarctica. The curve of the Aleutians protected much of Alaska, but the five at Scotch Cap had no chance.Ned Rozell
A chart of the marine areas in western Alaska and adjacent parts of Russia has been confirmed as an item used by Robert Bartlett, captain of the Karluk, a ship that was the center of a 1914 wreck off the Siberian coast.Yereth Rosen