The 10 historical earthquakes nearest to reference event 03072520480c
located at 45.6398 122.7362 that occurred prior to 03072520480c. 
The list includes events with magnitude (Mag) > 4.0 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        8.3   323.4	    23.1 km  NW of Portland, OR
1962 1106  03:36   18.0   5.5       11.4   108.1	     8.3 km NNE of Portland, OR
1961 1107  01:29    0.0   4.7       12.1   303.6	    26.5 km  NW of Portland, OR
1941 1229  18:37    0.0   5.0       14.8   142.1	     0.0 km   S of Portland, OR
1953 1216  04:32    0.0   5.0       15.8   169.6	     7.4 km WSW of Portland, OR
1877 1012  17:00    0.0   5.4       24.1   130.0	    10.2 km ESE of Portland, OR
1963 1227  02:36   35.0   4.5       50.3   288.3	    50.8 km  SW of Longview, WA
1961 0916  11:46    7.2   4.0       62.7    48.3	    21.0 km SSE of Mt St Helens, WA
1961 0916  03:24    7.2   4.8       62.8    48.7	    21.4 km SSE of Mt St Helens, WA
1961 0917  15:55    7.2   5.1       64.0    48.0	    20.3 km SSE of Mt St Helens, WA

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NEAREST HISTORICAL EARTHQUAKES SORTED CHRONOLOGICALLY

Year MoDy  Hr:Mn  Depth   Mag   Distance Azimuth      Event Location
           (UT)    (km)             (km)   (Deg)
1877 1012  17:00    0.0   5.4       24.1   130.0	    10.2 km ESE of Portland, OR
1941 1229  18:37    0.0   5.0       14.8   142.1	     0.0 km   S of Portland, OR
1953 1216  04:32    0.0   5.0       15.8   169.6	     7.4 km WSW of Portland, OR
1961 0916  03:24    7.2   4.8       62.8    48.7	    21.4 km SSE of Mt St Helens, WA
1961 0916  11:46    7.2   4.0       62.7    48.3	    21.0 km SSE of Mt St Helens, WA
1961 0917  15:55    7.2   5.1       64.0    48.0	    20.3 km SSE of Mt St Helens, WA
1961 1107  01:29    0.0   4.7       12.1   303.6	    26.5 km  NW of Portland, OR
1962 1106  03:36   18.0   5.5       11.4   108.1	     8.3 km NNE of Portland, OR
1963 1227  02:36   35.0   4.5       50.3   288.3	    50.8 km  SW of Longview, WA
1964 1001  12:31    0.0   4.1        8.3   323.4	    23.1 km  NW of Portland, OR