CHINO HILLS --
Scientists say a new fault generated last week's 5.4 magnitude Chino Hills earthquake.The new fault is called the Peralta Hills fault, and it intersects with the Whittier and Chino faults.
Click here for a slideshow of damage from last week's earthquake,
Tuesday's quake near Chino Hills caused minor to moderate damage and few injuries.
A USC science professor says the Peralta Hills fault could generate a 6.5 magnitude quake, but the two adjoining faults could trigger a 7.5, which would be more than a thousand times stronger than Tuesday's quake.
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