Ah, what a fickle thing memory is. I try to use occasions like
this to point out the usefulness of earthquake catalogs instead
of relying on "I don't recall this or that".

There are three networks that cover this region. The PNSN
is stationed in Washington and Oregon, GSC - The Geologic
Survey of Canada and the final - PGC - Pacific Geosciences
Center. The best data will normally come from a network which
has seismographs in the region where the earthquake occurred -
in this case - PGC. The farther the seismographs are from the
epicenter, the more the error will be. Generally, the network
will indicated in their catalog how reliable an epicentral
determination is.

For example, PNSN in their on-line searchable catalogs says
the quality of this epicenter is "D" - generally within 100 km.
This is not a particularly good determination to hang a hat on.
Comparing the PGC and GSC (GSC has taken the PGC epicenter for
this event) with the PNSN epicenter, we find a difference of
about 40 km in the two determinations and a difference of about
0.4 magnitude units from the following on-line sources:

http://www.seismo.nrcan.gc.ca/recent_canadian_eq/recent_canadian_eq_e.html
2001/07/16 08:03:06 48.35N 124.92W 28.5 2.0ML PGC WEST COAST OLYMPIC PENINSUL
A, WASHINGTON
http://www.geophys.washington.edu/recenteqs/Quakes/quakes0.html
map 1.6 2001/07/16 01:03:04 48.498N 125.337W 10.0 84 km (52 mi) SSE of Tofino
, BC
http://www.pgc.nrcan.gc.ca/seismo/recent/wc.50evt.list.html
2001/07/16 08:03:06 48.35N 124.92W 28 2.0 82 km SE Ucluelet BC

So about all we can really say about this event is it probably
happened in the region 48-2-48.7N 124.7-125.5W.
Searching the historical catalog for events in this region, we
find 195 events listed for the area. Of these, 58 have been of Ml>=2.0
since 1954, an average of about 1 per year. The largest event ever recorded
in the region occurred just over two months ago as a Ml 3.9 on
April 7, 2001 and was probably related to the Nisqually earthquake.
The most recent event of Ml>=2 occurred April 20, 2001 with Ml 2.2.

So, to answer your question, this is probably an aftershock of
the Ml 3.9 on April 7, and the region has a long history of light
earthquakes, this is an unusual event, but not a rare one.