Here is the proof of TWO back to back 5.x’s (originally 5.9.. now downgraded to 5.3).. link to PNSN chart which clearly shows two quakes …
http://www.pnsn.org/WEBICORDER/VOLC/MBW_SHZ_UW_–.2011101300.html
http://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/usc00068ex.php
Earthquake Details
This event has been reviewed by a seismologist.
Magnitude 5.9
Date-Time Thursday, October 13, 2011 at 04:13:59 UTC
Wednesday, October 12, 2011 at 08:13:59 PM at epicenter
Time of Earthquake in other Time Zones
Location 43.450°N, 127.102°W
Depth 10 km (6.2 miles)
Region OFF THE COAST OF OREGON
233 km (144 miles) W of Coos Bay, Oregon
277 km (172 miles) WSW of Newport, Oregon
277 km (172 miles) NW of Brookings, Oregon
365 km (226 miles) WSW of SALEM, Oregon
there is NO tsunami warning for this earthquake: