Publications
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Earthquakes & Volcanoes, Volume 21, Number 1, 1989: Featuring the U.S. Geological Survey's National Earthquake Information Center in Golden, Colorado, USA Earthquakes & Volcanoes, Volume 21, Number 1, 1989: Featuring the U.S. Geological Survey's National Earthquake Information Center in Golden, Colorado, USA
Earthquakes and Volcanoes is published bimonthly by the U.S. Geological Survey to provide current information on earthquakes and seismology, volcanoes, and related natural hazards of interest to both generalized and specialized readers. The Secretary of the Interior has determined that the publication of this periodical is necessary in the transaction of the public business required by...
Authors
Henry Spall, Diane C. Schnabel
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska
No abstract available.
Authors
John B. Townshend, R. V. O’Connell, Carol Ann Varner
An introduction to quiet daily geomagnetic fields An introduction to quiet daily geomagnetic fields
On days that are quiet with respect to solar-terrestrial activity phenomena, the geomagnetic field has variations, tens of gamma in size, with major spectral components at about 24, 12, 8, and 6 hr in period. These quiet daily field variations are primarily due to the dynamo currents flowing in the E region of the earth's ionosphere, are driven by the global thermotidal wind systems, and...
Authors
W.H. Campbell
Structures associated with strike-slip faults that bound landslide elements Structures associated with strike-slip faults that bound landslide elements
Large landslides are bounded on their flanks and on elements within the landslides by structures analogous to strike-slip faults. We observed the formation of thwse strike-slip faults and associated structures at two large landslides in central Utah during 1983-1985. The strike-slip faults in landslides are nearly vertical but locally may dip a few degrees toward or away from the moving...
Authors
R. W. Fleming, A. M. Johnson
Flow modeling in the Toutle River, Washington Flow modeling in the Toutle River, Washington
No abstract available.
Authors
Yasuyuki Shimizu, Randy L. Dinehart, J. Dungan Smith
Morphology of sea-floor landslides on Horizon Guyot: application of steady-state geotechnical analysis Morphology of sea-floor landslides on Horizon Guyot: application of steady-state geotechnical analysis
Mass movement and erosion have been identified on the pelagic sediment cap of Horizon Guyot, a seamount in the Mid-Pacific Mountains. Trends in the size, shape and preservation of bedforms and sediment textural trends on the pelagic cap indicate that bottom-current-generated sediment transport direction is upslope. Slumping of the sediment cap occurred on and that the net bedload...
Authors
R. E. Kayen, W. C. Schwab, H.J. Lee, M.E. Torresan, J.R. Hein, P. J. Quinterno, L.A. Levin
IRIS/USGS plans for upgrading the Global Seismograph Network IRIS/USGS plans for upgrading the Global Seismograph Network
This report has been prepared to provide information to organizations that may be asked to participate in a program to upgrade the global seismographic network. In most cases, the organizations that will be offered new instrumentation by the U.S. Geological Survey currently operate stations in the World-Wide Standardized Seismograph Network (WWSSN) or the Global Digital Seismograph...
Authors
Jon Peterson, Charles R. Hutt
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska
No abstract available.
Authors
John B. Townshend, R. V. O’Connell, Carol Ann Varner
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska
No abstract available.
Authors
John B. Townshend, R. V. O’Connell, Carol Ann Varner
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska
No abstract available.
Authors
John B. Townshend, R. V. O’Connell, Carol Ann Varner
The competition between thermal contraction and differentiation in the stress history of the Moon The competition between thermal contraction and differentiation in the stress history of the Moon
The scarcity of both extension and compression features on the Moon strongly constrains the history of the lunar radius—to variations of less than ±1 km over the past 3.8 Gyr. This limit has traditionally been interpreted as requiring a delicate balance between thermal contraction of the near‐surface and expansion of a substantial cold interior region. Recent theories of lunar origin (e...
Authors
Randolph L. Kirk, David J. Stevenson
A broad-band, wide-dynamic range, strong-motion array near Parkheld, California, USA for measurement of acceleration and volumetric strain A broad-band, wide-dynamic range, strong-motion array near Parkheld, California, USA for measurement of acceleration and volumetric strain
No abstract available.
Authors
Roger D. Borcherdt, Malcolm J. S. Johnston, Thomas Noce, Gary Glassmoyer, Douglas Myren