This week marks the 25th anniversary of the Loma Prieta earthquake, the magnitude 6.9 quake that shook San Francisco's Marina District in 1989.
A new study published Tuesday in the Bulletin of the Seismological Society of America finds that fault lines under the Bay Area are now poised to unleash earthquakes that could match or rival the Loma Prieta quake.
The report's lead author Jim Lienkaemper, a geophysicist with the U.S. Geological Survey, joins Take Two for more.