EQ History from 1998 to time of main shock
 Events are listed from geographic area 45.5332894 45.7332892 122.5998816 122.9332147
 Reference point in table is the mainshock of 9907162133

Distance and Azimuth from reference point to each earthquake
Reference point at Location   45.6480  122.7728

Event_Date___(UT) Depth  Mag  Dist(km)  Az(deg) Site Lat   Site Lon
1998 0421   02:39   8.5  1.4       2.0    165.7  45.6302   122.7663
1998 0812   18:45   2.2  2.6       3.1    249.5  45.6382   122.8103
1999 0210   01:54  18.8  2.1       9.5    159.5  45.5683   122.7303
1999 0716   05:58  19.7  2.3       0.4    329.6  45.6508   122.7752
1999 0716   05:59  18.9  2.3       0.4    327.6  45.6512   122.7757
1999 0716   21:33  18.5  3.2       0.0    270.0  45.6480   122.7728