Earthquake early warning system passes major test with quake

Some might believe that the 4.7 magnitude Riverside County temblor that rattled windows and swayed skyscrapers across Southern California on Monday morning released tension from the San Jacinto fault, thereby avoiding danger of a larger earthquake.A magnitude 4.7 earthquake struck deep beneath a mountain range in Southern California on Monday, jangling the nerves of tennis stars competing in the nearby desert town of Indian Wells.The early earthquake warning system is a pilot project for what scientists hope will eventually be a statewide network using thousands of sensors to notify people about imminent shaking from moderate to strong earthquakes. Backers say an early warningMonday morning's magnitude 4.7 earthquake in Riverside County was the largest temblor to hit the Los Angeles region in three years and has produced more than 100 aftershocks. It caused no major damage, but it

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