EQ History from 1998 to time of main shock
 Events are listed from geographic area 47.5332894 47.7332892 122.9998832 123.3332162
 Reference point in table is the mainshock of 9908191316

Distance and Azimuth from reference point to each earthquake
Reference point at Location   47.6280  123.1603

Event_Date___(UT) Depth  Mag  Dist(km)  Az(deg) Site Lat   Site Lon
1998 0616   12:12  10.5  1.1      10.2    112.5  47.5930   123.0355
1999 0816   16:35  44.1  1.1       3.8    266.4  47.6258   123.2113
1999 0819   13:16  47.3  3.1       0.0    270.0  47.6280   123.1603