A magnitude 7.1 temblor struck northeast of Los Angeles on Friday, July 5 at 8:19 p.m., a day after a 6.4 magnitude rocked the same area, knocking out power to thousands and prompting questions on proper calibration of a recently introduced earthquake early-warning system.

The son of a pioneer bush pilot in Alaska, structural engineer John Aho spent decades working toward earthquake preparedness. 

Raised in Venezuela, U.S. citizen Andres Lepage considers his adopted homeland the “best country in the world.”

The magnitudes 7.0 and 5.7 earthquakes that struck Anchorage, Alaska, on Nov. 30 shook buildings and shattered highways, but caused limited structural damage and no reported loss of life, mostly due to the depth and location of the quake’s epicenter, as well as the city and state’s stringent building requirements.

To reduce seismic risk to new tall buildings, San Francisco should develop regulations to address foundation and geotechnical issues.

Susceptibility to extreme seismic forces need not be a barrier to the use of accelerated bridge construction methods, according to researchers at the University of Nevada, Reno’s Earthquake Engineering Laboratory.