• journal_title：Bulletin of the Seismological Society of America
• Contributor：Larry Gedney ; John N. Davies
• Publisher：Seismological Society of America
• Date：1986-
• Format：text/html
• Language：en
• journal_abbrev：Bulletin of the Seismological Society of America
• issn：0037-1106
• volume：76
• issue：5
• firstpage：1207
• section：Articles

Small intermediate-depth earthquakes cluster in a volume about 20 km in diameter beneath Gold King, a landing strip on the northern flanks of the Alaska Range. These events, almost 600 km from the Aleutian trench, are the northern-most which can be identified as being associated with the Benioff zone extending inland from Cook Inlet west of Anchorage. First-motion observations of the Gold King events at local stations can be combined to determine a tensional axis dipping steeply to the north at an azimuth just west of north. This composite mechanism suggests that the slab is subjected to down-dip tensional forces, probably as a result of gravitational sinking.