SUBDUCTION ZONE EARTHQUAKES

SHALLOW EARTHQUAKES - AT DEPTHS LESS THAN 70 KM - REFLECT MOTION AT THE BOUNDARY INTERFACE BETWEEN THE SUBDUCTING AND OVERRIDING PLATES

DEEPER EARTHQUAKES OCCUR WITHIN THE (RELATIVELY)

COLD SUBDUCTING PLATE AND SHOW THAT MATERIAL IS GOING DOWN

THE DIPPING PLANE OF EARTHQUAKES IS CALLED A

"WADATi-BENIOFF" ZONE

(Press & Siever)