EQ History from 1998 to time of main shock
 Events are listed from geographic area 47.0999551 47.2999549 122.0998816 122.4332147
 Reference point in table is the mainshock of 9901041510

Distance and Azimuth from reference point to each earthquake
Reference point at Location   47.2053  122.2818

Event_Date___(UT) Depth  Mag  Dist(km)  Az(deg) Site Lat   Site Lon
1998 0930   19:04  16.4  1.7      10.5     17.9  47.2953   122.2390
1998 0930   20:51  14.4  1.5      11.0     18.6  47.2988   122.2355
1998 1225   07:50  19.5  1.5       7.0     90.5  47.2047   122.1890
1999 0104   15:10  20.3  3.2       0.0    328.8  47.2053   122.2818