How Earthquake Early Warning Systems Work
September 30, 2013 | National Geographic
National Geographic has an article that explains how an earthquake early warning system can work and the benefits that it can bring to an urban area.
Magnitude 5.1: Los Angeles Area
March 29, 2014 | Los Angeles Times
A magnitude 5.1 earthquake occurred at about 9:09PM local time on Friday evening near La Habra, California. Minor injuries and numerous damaged buildings and vehicles have been reported. The Los Angeles Times has several articles.
The USGS reports:
-- maximum observed instrumental intensity of VII at La Habra
-- Did you feel it? Map reports of VII
-- early warning of 4 seconds in Pasadena
-- numerous aftershocks
M8.2 Earthquake Off the Coast of Chile
April 1, 2014 | Los Angeles Times
A magnitude 8.2 earthquake struck off the Pacific coast of Chile at about 6:46 PM local time. An early report in the Los Angeles Times indicates building and highway damage. A tsunami warning was issued but waves observed were small. View USGS Data.