SEISMOLOGICAL REPORTS FOR FEBRUARY, 1919

Seismological aspects of the Guatemala Earthquake of February 4, 1976

Detailed analyses of teleseismic surface waves and body waves from the Guatemala e rthquake of February 4, 1976, show the following: (1) Left lateral displacement along a vertical fault with a strike varying from N66øE to N98øE is consistent with the teleseismic data. (2) The seismic moment was 2.6 X 102? dyn cm. The directivity ofthe surface wave radiation i dicates an asymmetric (1:2.3) bilat...

Ambulance Diary for 1919

Global Tectonic Regionalization for Seismological Data Analysis

A global tectonic regionalization, GTR1, has been constructed for use in seismological studies of aspherical heterogeneity. Three oceanic regions are defined by equal increments in the square root of crustal age (25and lO0-m.y. isochrons), and three continental regions are distinguished according to their generalized tectonic behavior during the Phanerozoic (Precambrian shields and platforms, P...

Seismological Constraints upon Mantle Composition

T32B-03, pp. WP193–WP194. Birch F. (1952) Elasticity and constitution of the Earth’s interior. J. Geophys. Res. 57, 227–286. Brodholt J. P. (2000) Pressure-induced changes in the compression mechanism of aluminous perovskite in the Earth’s mantle. Nature 407, 620–622. Castle J. C. and Creager K. C. (1999) A steeply dipping discontinuity in the lower mantle beneath Izu-Bonin. J. Geophys. Res. 10...

Op-brhe140373 1917..1919

In recent years the scientific community has shown renewed interest in DISH. The article by Yaniv et al. [1] in this issue of Rheumatology describes the natural evolution of DISH, providing important new insights into this condition. The article presents a study that used CT, a highly sensitive three-dimensional imaging modality for assessing new bone formation, to identify DISH patients and ex...