SOME OBSERVATIONS OF WEAK JAPANESE EARTHQUAKES AT THE MONTANA LASA
Abstract
Data on small local earthquakes were obtained from a tripartite located on the island of Honshu, Japan. Epicenters and origin times were computed from the data but local magnitudes could not be determined. LASA beams were formed at and around the computed epicenters to determine if the event could be detected on the array. From the original population of about 150 events, only 28 could be detected or were marginal. The LASA epicenters were obtained by beamsplitting and were found to be consistent with the theoretical location errors expected for beams steered to Japan. Although the total number of events visible at LASA were small, it was consistent with a beam detection threshold of 3.5 for beams steered to Japan.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 08, 1968
- Accession Number
- AD0665122
Entities
People
- E. J. Kelly
- H. W. Briscoe
- R. M. Sheppard
Organizations
- Massachusetts Institute of Technology