The quake near Rialto was felt in San Bernardino, Pomona, Fontana and Bloomington. There were no reports of damage.
Caltech says that when quakes happen so close together, sometimes the information doesn't always come through cleanly. After a seismologist reviewed information relating to the quake near Trona, it was downgraded to a 2.5
Caltech says these quakes, or clusters of quakes, happen from time to time. There is no specific indication that any of these, though they are generally in the same area, will lead to a larger quake. They say a larger quake is still considered a very small possibility.
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