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Data sets Publications Expeditions Thesaurus
shallow-focus earthquakes  search
BTearthquakes
 .shallow-focus earthquakes
UFnormal earthquake
 shallow earthquake
RTfocus
 Xingtai earthquake 1966
 Chile earthquake 1960
 deep-focus earthquakes
 intermediate-focus earthquakes
 Kettleman Hills earthquake 1985
SNBefore 1978, search earthquakes AND shallow focus.