The 10 historical earthquakes nearest to reference event 10111615510c
located at 46.5610 122.4353 that occurred prior to 10111615510c. 
The list includes events with magnitude (Mag) > 3.0 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)
2010 1116  15:51   14.7   4.2        0.0   270.0	    12.3 km   W of Morton, WA
1971 0528  10:42   15.7   3.4        3.3     5.1	    12.5 km WNW of Morton, WA
1977 0530  04:35   24.9   3.0       11.8   120.9	     6.2 km SSW of Morton, WA
1979 0311  14:39   19.0   3.9       13.3   169.5	    16.2 km  SW of Morton, WA
1968 1130  14:40   13.0   3.8       13.5    11.5	    16.6 km  NW of Morton, WA
1976 1014  21:39   17.3   4.0       13.6    22.4	    14.7 km NNW of Morton, WA
1979 0707  20:50   21.0   3.6       14.2   134.7	     9.9 km SSW of Morton, WA
1984 0805  19:11   11.3   3.1       18.4   133.4	    12.4 km   S of Morton, WA
1995 0102  04:10   19.0   3.3       22.0    16.5	    14.7 km SSW of Eatonville, WA
1981 0711  01:08    9.7   3.1       25.6   144.9	     4.5 km NNW of Elk Lake, WA

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NEAREST HISTORICAL EARTHQUAKES SORTED CHRONOLOGICALLY

Year MoDy  Hr:Mn  Depth   Mag   Distance Azimuth      Event Location
           (UT)    (km)             (km)   (Deg)
1968 1130  14:40   13.0   3.8       13.5    11.5	    16.6 km  NW of Morton, WA
1971 0528  10:42   15.7   3.4        3.3     5.1	    12.5 km WNW of Morton, WA
1976 1014  21:39   17.3   4.0       13.6    22.4	    14.7 km NNW of Morton, WA
1977 0530  04:35   24.9   3.0       11.8   120.9	     6.2 km SSW of Morton, WA
1979 0311  14:39   19.0   3.9       13.3   169.5	    16.2 km  SW of Morton, WA
1979 0707  20:50   21.0   3.6       14.2   134.7	     9.9 km SSW of Morton, WA
1981 0711  01:08    9.7   3.1       25.6   144.9	     4.5 km NNW of Elk Lake, WA
1984 0805  19:11   11.3   3.1       18.4   133.4	    12.4 km   S of Morton, WA
1995 0102  04:10   19.0   3.3       22.0    16.5	    14.7 km SSW of Eatonville, WA
2010 1116  15:51   14.7   4.2        0.0   270.0	    12.3 km   W of Morton, WA