geological scientists have been investigating major event in Nepal since 1990 . low density , weak infrastructure infrastructure amplified ’ , USGS engineer says . ` ` This event , while large and tragic , is not unusual '' in Nepal , geological engineer says .
Earthquake scientists have been expecting major event in Nepal since 1934 . Population density , weak building infrastructure amplified damage , USGS spokesman says . `` This event , while large and tragic , is not unusual '' in region , geological engineer says .