On Tuesday night, the National Weather Service issued a tsunami bulletin for the Pacific coast from the California-Mexico border to Vancouver, Canada, after a 7.0 magnitude earthquake occurred approximately 80 miles off the coast of Northern California at 19:50 PDT.
The warning has now been cancelled.  The quake's motion was horizontal, not vertical (the movement that typically leads to a tsunami).
Witnesses along the California coast reported buildings shaking, but no major damage or injuries were reported.
Details of the earthquakes which have taken place in the past week (including the three major earthquakes which have taken place in, or close to, the Americas over the last 24 hours) can be found at http://earthquake.usgs.gov/
A full text of the now-cancelled tsunami warning follows:
TSUNAMI BULLETIN NUMBER 001
PACIFIC TSUNAMI WARNING CENTER/NOAA/NWS
ISSUED AT 0259Z 15 JUN 2005
THIS BULLETIN IS FOR ALL AREAS OF THE PACIFIC BASIN EXCEPT
ALASKA - BRITISH COLUMBIA - WASHINGTON - OREGON - CALIFORNIA.
... TSUNAMI INFORMATION BULLETIN ...
THIS MESSAGE IS FOR INFORMATION ONLY. THERE IS NO TSUNAMI WARNING
OR WATCH IN EFFECT.
AN EARTHQUAKE HAS OCCURRED WITH THESE PRELIMINARY PARAMETERS
ORIGIN TIME -  0251Z 15 JUN 2005
COORDINATES -  41.3 NORTH  125.7 WEST 
LOCATION    -  OFF COAST OF NORTHERN CALIFORNIA
MAGNITUDE   -  7.4
EVALUATION
NO DESTRUCTIVE PACIFIC-WIDE TSUNAMI THREAT EXISTS BASED ON
HISTORICAL EARTHQUAKE AND TSUNAMI DATA.                             
HOWEVER - EARTHQUAKES OF THIS SIZE SOMETIMES GENERATE LOCAL
TSUNAMIS THAT CAN BE DESTRUCTIVE ALONG COASTS LOCATED WITHIN
A HUNDRED KILOMETERS OF THE EARTHQUAKE EPICENTER. AUTHORITIES
IN THE REGION OF THE EPICENTER SHOULD BE AWARE OF THIS
POSSIBILITY AND TAKE APPROPRIATE ACTION.                            
THIS WILL BE THE ONLY BULLETIN ISSUED FOR THIS EVENT UNLESS
ADDITIONAL INFORMATION BECOMES AVAILABLE.
THE WEST COAST/ALASKA TSUNAMI WARNING CENTER WILL ISSUE BULLETINS
FOR ALASKA - BRITISH COLUMBIA - WASHINGTON - OREGON - CALIFORNIA.
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Tsunami bulletin issued from Pacific coast of California-Mexico border to Vancouver, Canada