The 10 historical earthquakes nearest to reference event 99031213051n
located at 47.3340 117.6408 that occurred prior to 99031213051n. 
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)
1975 0918  12:19    6.5   3.5       70.5   319.0	    57.5 km ESE of Grand Coulee, WA
1942 1101  18:50    0.0   5.5      102.4    43.3	    64.2 km  NE of Spokane, WA
1966 0723  01:57    7.4   3.9      133.1   249.9	    12.8 km  NW of Othello, WA
1973 1220  01:08    3.3   4.4      140.3   248.9	    15.2 km WNW of Othello, WA
1966 1106  10:50    6.1   3.6      143.0   299.7	    22.6 km   W of Grand Coulee, WA
1967 0606  17:12   33.0   3.6      145.8   311.9	    29.7 km NNW of Grand Coulee, WA
1988 0528  09:02    0.0   3.5      147.8   247.4	    20.0 km   W of Othello, WA
1936 0716  07:07    0.0   6.1      156.7   199.0	     8.1 km SSE of Walla Walla, Wa
1992 0714  20:01   11.6   4.1      157.7   199.2	     8.8 km   S of Walla Walla, Wa
1991 1128  01:08    9.5   4.3      158.3   199.3	     9.0 km   S of Walla Walla, Wa

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NEAREST HISTORICAL EARTHQUAKES SORTED CHRONOLOGICALLY

Year MoDy  Hr:Mn  Depth   Mag   Distance Azimuth      Event Location
           (UT)    (km)             (km)   (Deg)
1936 0716  07:07    0.0   6.1      156.7   199.0	     8.1 km SSE of Walla Walla, Wa
1942 1101  18:50    0.0   5.5      102.4    43.3	    64.2 km  NE of Spokane, WA
1966 0723  01:57    7.4   3.9      133.1   249.9	    12.8 km  NW of Othello, WA
1966 1106  10:50    6.1   3.6      143.0   299.7	    22.6 km   W of Grand Coulee, WA
1967 0606  17:12   33.0   3.6      145.8   311.9	    29.7 km NNW of Grand Coulee, WA
1973 1220  01:08    3.3   4.4      140.3   248.9	    15.2 km WNW of Othello, WA
1975 0918  12:19    6.5   3.5       70.5   319.0	    57.5 km ESE of Grand Coulee, WA
1988 0528  09:02    0.0   3.5      147.8   247.4	    20.0 km   W of Othello, WA
1991 1128  01:08    9.5   4.3      158.3   199.3	     9.0 km   S of Walla Walla, Wa
1992 0714  20:01   11.6   4.1      157.7   199.2	     8.8 km   S of Walla Walla, Wa