Publications
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The geomagnetic jerk of 1969 and the DGRFs The geomagnetic jerk of 1969 and the DGRFs
Cubic spline fits to the DGRF/IGRF series indicate agreement with other analyses showing the 1969-1970 magnetic jerk in the h ??12 and g ??02 secular change coefficients, and agreement that the h ??11 term showed no sharp change. The variation of the g ??01 term is out of phase with other analyses indicating a likely error in its representation in the 1965-1975 interval. We recommend...
Authors
D. Thompson, J.C. Cain
Sidescan sonar as a tool for detection of demersal fish habitats Sidescan sonar as a tool for detection of demersal fish habitats
Sidescan sonar can be an effective tool for the determination of the habitat distribution of commercially important species. This technique has the advantage of rapidly mapping large areas of the seafloor. Sidescan images (sonographs) may also help to identify appropriate fishing gears for different types of seafloor or areas to be avoided with certain types of gears. During the early...
Authors
Kenneth W. Able, David C. Twichell, Churchill B. Grimes, R. S. Jones
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, July 1987 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, July 1987
No abstract available.
Authors
John B. Townshend, R. V. O’Connell, L.Y. Torrence
Multispectral Landsat images of Antarctica Multispectral Landsat images of Antarctica
No abstract available.
Authors
Baerbel K. Lucchitta, Jo-Ann Bowell, K.L. Edwards, E. M. Eliason, H.M. Ferguson
Rainfall, ground-water flow, and seasonal movement at Minor Creek landslide, northwestern California: Physical interpretation of empirical relations Rainfall, ground-water flow, and seasonal movement at Minor Creek landslide, northwestern California: Physical interpretation of empirical relations
Simple ground-water flow analyses can clarify complex empirical relations between rainfall and landslide motion. Here we present detailed data on rainfall, ground-water flow, and repetitive seasonal motion that occurred from 1982 to 1985 at Minor Creek landslide in northwestern California, and we interpret these data in the context of physically based theories. We find that landslide...
Authors
R.M. Iverson, J. J. Major
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, April 1987 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, April 1987
No abstract available.
Authors
John B. Townshend, R. V. O’Connell, L.Y. Torrence
Landslides of Eastern North America Landslides of Eastern North America
No abstract available.
Authors
Arthur P. Schultz, C.S. Southworth
Earthquakes May-June 1986 Earthquakes May-June 1986
No abstract available.
Authors
Waverly J. Person
Localized sudden changes in the geomagnetic secular variation. Localized sudden changes in the geomagnetic secular variation.
There is much debate as to whether there was a worldwide geomagnetic jerk in 1969 or 1970. It is agreed that there was an unusual sharp change in the secular variation in the east component, Y, in Europe at that time. This note points out how a localized sudden change in the secular variation pattern of one component in Europe can occur without having any large worldwide effects in any...
Authors
L.R. Alldredge
Valles Marineris, Mars: Wet debris flows and ground ice Valles Marineris, Mars: Wet debris flows and ground ice
Detailed study of the Valles Marineris equatorial troughs suggests that the landslides in that area contained water and probably were gigantic wet debris flows: one landslide complex generated a channel that has several bends and extends for 250 km. Further support for water or ice in debris masses includes rounded flow lobes and transport of some slide masses in the direction of the...
Authors
Baerbel K. Lucchitta
Unconformable sequence boundaries at Deep Sea Drilling Project Site 612, New Jersey Transect: their characteristics and stratigraphic significance Unconformable sequence boundaries at Deep Sea Drilling Project Site 612, New Jersey Transect: their characteristics and stratigraphic significance
No abstract available.
Authors
C. Wylie Poag, Doris Low