The 10 historical earthquakes nearest to reference event 99071621333c
located at 45.6480 122.7728 that occurred prior to 99071621333c. 
The list includes events with magnitude (Mag) > 3.5 and gives distance
and azimuth  from the reference event to each historical earthquake.

Date is given in Universal Time (UT). Subtract 8 hours to get Pacific
Standard time (PST) or 7 hours for PDT. Azimuth is the compass
direction (measured clockwise from North, 0-360 degrees) of the
earthquake from the location of the reference event. Usually, depths
listed as 0.0 km are either unknown or very unreliable.

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NEAREST HISTORICAL EARTHQUAKES SORTED BY DISTANCE FROM REFERENCE EVENT

Year MoDy  Hr:Mn  Depth   Mag   Distance Azimuth      Event Location
           (UT)    (km)             (km)   (Deg)
1964 1001  12:31    0.0   4.1        6.2   339.9	    23.1 km  NW of Portland, OR
1991 0722  09:04   19.8   3.5        7.6   261.5	    22.6 km WNW of Portland, OR
1961 1107  01:29    0.0   4.7        9.3   308.6	    26.5 km  NW of Portland, OR
1968 0127  08:28   34.0   3.8       13.8   107.8	     8.4 km   N of Portland, OR
1968 0513  18:52    8.0   3.6       14.3   114.3	     6.8 km   N of Portland, OR
1962 1106  03:36   18.0   5.5       14.4   108.0	     8.3 km NNE of Portland, OR
1941 1229  18:37    0.0   5.0       17.3   136.5	     0.0 km   S of Portland, OR
1961 1107  21:30    0.0   3.9       17.3   136.5	     0.0 km   S of Portland, OR
1953 1216  04:32    0.0   5.0       17.4   160.9	     7.4 km WSW of Portland, OR
1989 0801  23:25   14.4   3.7       25.0    99.9	    15.2 km ENE of Portland, OR

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NEAREST HISTORICAL EARTHQUAKES SORTED CHRONOLOGICALLY

Year MoDy  Hr:Mn  Depth   Mag   Distance Azimuth      Event Location
           (UT)    (km)             (km)   (Deg)
1941 1229  18:37    0.0   5.0       17.3   136.5	     0.0 km   S of Portland, OR
1953 1216  04:32    0.0   5.0       17.4   160.9	     7.4 km WSW of Portland, OR
1961 1107  01:29    0.0   4.7        9.3   308.6	    26.5 km  NW of Portland, OR
1961 1107  21:30    0.0   3.9       17.3   136.5	     0.0 km   S of Portland, OR
1962 1106  03:36   18.0   5.5       14.4   108.0	     8.3 km NNE of Portland, OR
1964 1001  12:31    0.0   4.1        6.2   339.9	    23.1 km  NW of Portland, OR
1968 0127  08:28   34.0   3.8       13.8   107.8	     8.4 km   N of Portland, OR
1968 0513  18:52    8.0   3.6       14.3   114.3	     6.8 km   N of Portland, OR
1989 0801  23:25   14.4   3.7       25.0    99.9	    15.2 km ENE of Portland, OR
1991 0722  09:04   19.8   3.5        7.6   261.5	    22.6 km WNW of Portland, OR