Publications
Filter Total Items: 7613
Recent and relict topography of Boo Bee patch reef, Belize Recent and relict topography of Boo Bee patch reef, Belize
Five core borings were taken on and around Boo Bee Patch Reef to better understand the origin of such shelf lagoon reefs. The cores reveal 4 stages of development: (1) subaerial exposure of a Pleistocene "high" having about 8 meters of relief, possibly a Pleistocene patch reef; (2) deposition of peat and impermeable terrigenous clay 3 meters thick around the high; (3) initiation of...
Authors
R. B. Halley, E.A. Shinn, J.H. Hudson, B. Lidz
Spectral characteristics of geomagnetic field variations at low and equatorial latitudes Spectral characteristics of geomagnetic field variations at low and equatorial latitudes
Geomagnetic field spectra from eight standard observations at geomagnetic latitudes below 30?? were studied to determine the field characteristics unique to the equatorial region. Emphasis was placed upon those variations having periods between 5 min and 4 hr for a selection of magnetically quiet, average, and active days in 1965. The power spectral density at the equator was about ten...
Authors
W.H. Campbell
Earthquake-hazard map of the United States Earthquake-hazard map of the United States
[None]
Authors
Sylvester Theodore Algermissen, David M. Perkins
Memorial: Keith Edward Bullen, 1906-1976 Memorial: Keith Edward Bullen, 1906-1976
No abstract
Authors
B. A. Bolt
Application of linear statistical models of earthquake magnitude versus fault length in estimating maximum expectable earthquakes Application of linear statistical models of earthquake magnitude versus fault length in estimating maximum expectable earthquakes
Correlation or linear regression estimates of earthquake magnitude from data on historical magnitude and length of surface rupture should be based upon the correct regression. For example, the regression of magnitude on the logarithm of the length of surface rupture L can be used to estimate magnitude, but the regression of log L on magnitude cannot. Regression estimates are most...
Authors
Robert K. Mark
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska: December 1977 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska: December 1977
The preliminary geomagnetic data included here is made available to scientific personnel and organizations, as part of a cooperative effort and on a data exchange basis because of the early need by some users. To avoid delay, all of the data is copied from original forms processed at the observatory; therefore it should be regarded as preliminary.
Authors
J.B. Townshend, J.E. Papp, M.J. Moorman, C.E. Deadmon, S.P. Tilton