Comprehensive study of the seismotectonics of the eastern Aleutian ARC and associated volcanic systems. Annual progress report, March 1, 1981-February 28, 1982
Assessment of the seismic potential for occurrence of great earthquakes in three seismic gaps (Shumagin Islands, Unalaska Island, and Yakataga-Kayak regions) has been completed. In the best-instrumented seismic gap in the Shumagin Islands region, the likelihood for a great earthquake within the next two decades is high. Analysis of earthquake data collected from a telemetered network operated in the Shumagin seismic gap shows near-quiescence in the shallow portion of the main thrust zone. Installation of digital recording equipment at the central station of the Shumagin network, combined with interactive computer analysis at Lamont-Doherty of either digitally recorded or digitized analog seismic data has provided new research possibilities for studying seismic source properties, wave propagation in a laterally heterogeneous velocity structure of the subduction zone, and for seismically screening the root-zone and volcanic pile of Pavlof volcano. High time-resolution data (0.01 sec), and wider frequency band-pass data (0.5 to 30 Hz) are now being collected. Seismic data for two eruptive sequences of Pavlof-volcano have been obtained.
- Research Organization:
- Columbia Univ., Palisades, NY (USA). Lamont-Doherty Geological Observatory
- DOE Contract Number:
- AS02-76ER03134
- OSTI ID:
- 5523148
- Report Number(s):
- DOE/ER/03134-T1; ON: DE82005473
- Country of Publication:
- United States
- Language:
- English
Similar Records
Comprehensive study of the seismotectonics of the eastern Aleutian arc and associated volcanic systems. Annual progress report, March 1, 1980-February 28, 1981
Comprehensive study of the seismotectonics of the easter Aleutian arc and associated volcanic systems. Annual progress report, March 1, 1978--February 28, 1979
A comprehensive study of the seismotectonics of the eastern Aleutian arc and associated volcanic systems: Technical progress report, April 1, 1984-March 31, 1987
Technical Report
·
Wed Dec 31 23:00:00 EST 1980
·
OSTI ID:6746222
Comprehensive study of the seismotectonics of the easter Aleutian arc and associated volcanic systems. Annual progress report, March 1, 1978--February 28, 1979
Technical Report
·
Sun Dec 31 23:00:00 EST 1978
·
OSTI ID:6389953
A comprehensive study of the seismotectonics of the eastern Aleutian arc and associated volcanic systems: Technical progress report, April 1, 1984-March 31, 1987
Technical Report
·
Tue Jul 01 00:00:00 EDT 1986
·
OSTI ID:5404954