Hi Bob,
All your comments are correct within my knowledge.
Petra, however is also correct. Earthquakes at this depth in Oregon are
quite rare. I did a search for all earthquakes in the state of Oregon with
depths less than 40 km (this was 52 km). Since 1970 there have been
only 7 such events reported (excluding today's) with Ml>=2.5 (that's about
1 every 4 years). I am listing the prior such events here:

MO DAHRMNSCYEAR LAT LONG DEPTH MAG
11 19 7 4 37 1976 44.999 -120.960 84 3.1
6 22 7 41 56 1981 44.536 -123.796 58 2.5
6 25 7 21 29 1987 42.553 -124.971 74 3.0
4 1 3 1 42 1989 44.443 -124.223 55 2.8
6 11 12 0 34 1989 44.480 -124.800 42 3.3
12 4 22 15 19 1993 42.330 -121.950 58 5.8
12 30 1 52 60 2000 44.737 -123.170 61 2.6