A 2005 spate of quakes in California's Central Valley almost certainly was triggered by oilfield injection underground, a study published Thursday said in the first such link in California between oil and gas operations and earthquakes.
A magnitude-7.1 quake knocked items off shelves and walls in Alaska, jolting the nerves of residents in this earthquake-prone region. There were no reports of injuries, but four homes were lost to explosions or fire following the quake.
The owner of a survival and first aid company says the 4.3-magnitude earthquake that hit British Columbia's South Coast served as a "wake-up call" for local residents to become prepared for an emergency situation.
Thousands of older wood and concrete apartment buildings vulnerable to collapse in a major earthquake would get costly upgrades under sweeping retrofitting rules passed Friday by the Los Angeles City Council.
University of Washington researchers are testing an earthquake alert system as the Pacific Northwest prepares for the day when a 965-kilometre-long fault line looming off the coast unleashes a catastrophic earthquake and tsunami.