TECTONIC MOVEMENT AND DEFORMATION RELEASE IN ALASKA
Abstract
The report covers the research effort of the seismology-volcanology section, which was supported during the past years by AFOSR grants. The past two years have seen the steady development of seismology in Alaska. The University's Geophysical Institute has established the large telemetry network, and accurate epicenter location of even small shocks is now routine work. Crustal structure determination in the Tanana Basin were attempted. The Fairbanks earthquakes and aftershocks in June (magnitude 5 3/4, 6 and 5 3/4 within 20 minutes) highlighted the necessity for further studies and yielded interesting outlooks on the mechanics of pre-failure stress. In the Katmai area--in the active volcanic belt--application of Gorshkov's idea permitted the determination of the magma chambers. Shear waves are screened by the reservoirs. A judicious distribution of seismic wave sources and recording sites permits the delineation of these magma chambers. A detailed gravity survey shows one of them very precisely.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1968
- Accession Number
- AD0676018
Entities
People
- Eduard Berg
Organizations
- University of Alaska Fairbanks