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Publication Extents

Not all publications have extents, not all extents are completely accurate
Earthquakes; March-April 1982
W. J. Person
1982, Earthquake Information Bulletin (USGS) (14) 188-191
The earthquake activity during this reporting period was somewhat quiet as far a significant earthquakes were concerned. There were no major [magnitude (m)=7.0-7.9] earthquakes during this reporting period, but five people were reported killed in Peru from earthquakes on March 24 and 28. A number earthquakes occurred in the United States,...
Earthquakes; January-February 1982
W. J. Person
1982, Earthquake Information Bulletin (USGS) (14) 147-151
A number of significant earthquakes occurred in many parts of the world during the first month of this year. The first major earthquake (magnitude 7.0-7.9) of the year was on January 11 in the Philippine Islands. the second major quake, on January 18 in the Aegean Sea, was followed by...
Volcanic hazard alert issued for the Long Valley-Mono Lake area of California
R. A. Kerr
1982, Earthquake Information Bulletin (USGS) (14) 84-93
The ski resort of Mammoth Lakes, nestled against the east front of the Sierra Nevada just east of Yosemite National Park, knows about natural hazards. It is still being shaken by an unusual sequence of earthquakes that started in 1978 and included four earthquakes of magnitude 6 within 48 hours...
Seismology in Mexico
C. Lomnitz
1982, Earthquake Information Bulletin (USGS) (14) 30-32
Mexico is situated at the intersection of four major crustal Plates: the Americas Plate, the Pacific Plate, the Caribbean Plate, and the Cocos Plate. The interaction of these four plates is very complex. The pattern of earthquake risk is, therefore, among the most complicated in the world. The average release...
Earthquake engineering research program in Chile
G. R. Saragoni
1982, Earthquake Information Bulletin (USGS) (14) 22-25
Earthquake engineering research in Chile has been carried out for more than 30 years. Systematic research is done at the university of Chile in Santiago. Other universities such as the Catholic University, university of Concepcion, and the Federico Santa Maria Technical University have begun to teach and conduct research in...
Working group on the “adequate minimum” V=volcanic observatory
R.I. Tilling
1982, Earthquake Information Bulletin (USGS) (14) 185-185
A working group consisting of R. I. Tilling (United States, Chairman), M. Espendola (Mexico), E. Malavassi (Costa Rica), L. Villari (Italy), and J.P Viode (France) met on the island of Guadeloupe on February 20, 1981, to discuss informally the requirements for a "Minimum" volcano observatory, one which would have the...
Preliminary correlations of MAGSAT anomalies with tectonic features of Africa
David A. Hastings
1982, Geophysical Research Letters (9) 303-306
An overview of the MAGSAT scalar anomaly map for Africa has suggested a correlation of MAGSAT anomalies with major crustal blocks of uplift or depression and different degrees of regional metamorphism. The strongest MAGSAT anomalies in Africa are closely correlated spatially with major tectonic features. Although a magnetic anomaly caused...
Assessing mesquite-grass vegetation condition from Landsat
Kirk C. McDaniel, Robert H. Haas
1982, Photogrammetric Engineering and Remote Sensing (48) 441-450
Landsat multispectral scanner (MSS) band values, band ratios, and vegetation index models were compared with selected rangeland vegetation parameters collected at six test sites within the honey mesquitellotebushlmixed grass association in north-central Texas. The comparisons at four dates showed that two vegetation index models, TV16 and GVI, are highly correlated...
Evaluating the crop coefficient using spectral reflectance
J. L. Heilman, W. E. Heilman, Donald G. Moore
1982, Agronomy Journal (74) 967-971
A field study was conducted in four differentially irrigated plots of alfalfa (Medicago sativa L.) planted in Shiprock sandy loam (coarseloamy, mixed, mesic Typic Haplargid) to assess spectral reflectance for estimating the crop coefficient (Kc), defined here as the ratio of actual to potential evapotranspiration (ET). A bidirectional reflectance factor was...
Digital image film generation: from the photoscientist's perspective
John E. Boyd
1982, Journal of Applied Photographic Engineering (8) 15-22
The technical sophistication of photoelectronic transducers, integrated circuits, and laser-beam film recorders has made digital imagery an alternative to traditional analog imagery for remote sensing. Because a digital image is stored in discrete digital values, image enhancement is possible before the data are converted to a photographic image. To create...
Evaluation of AMOEBA: a spectral-spatial classification method
Susan K. Jenson, Thomas R. Loveland, J. Bryant
1982, Journal of Applied Photographic Engineering (8) 159-162
Muitispectral remotely sensed images have been treated as arbitrary multivariate spectral data for purposes of clustering and classifying. However, the spatial properties of image data can also be exploited. AMOEBA is a clustering and classification method that is based on a spatially derived model for image data. In an evaluation...
Refining Landsat classification results using digital terrain data
Wayne A. Miller, Mark Shasby
1982, Journal of Applied Photographic Engineering (8) 35-40
 Scientists at the U.S. Geological Survey's Earth Resources Observation systems (EROS) Data Center have recently completed two land-cover mapping projects in which digital terrain data were used to refine Landsat classification results. Digital ter rain data were incorporated into the Landsat classification process using two different procedures that required developing...
Evaluating depth to shallow groundwater using Heat Capacity Mapping Mission (HCMM) data
J. L. Heilman, Donald G. Moore
1982, Photogrammetric Engineering and Remote Sensing (48) 1903-1906
Four dates of Heat Capacity Mapping Mission (HCMM) data were analyzed to evaluate the utility of HCMM thermal data for evaluating depth to shallow groundwater. During the summer, shallow water tables can create lower soil temperatures throughout the diurnal temperature cycle. Because of large spatial and temporal ground cover variations,...
The availability of conventional forms of remotely sensed data
James A. Sturdevant, Thomas M. Holm
1982, Journal of Applied Photographic Engineering (8) 153-158
For decades Federal and State agencies have been collecting aerial photographs of various film types and scales over parts of the United States. More recently, worldwide Earth resources data acquired by orbiting satellites have inundated the remote sensing community. Determining the types of remotely sensed data that are publicly available...
Oahu: perspective from space
Gary E. Johnson
1982, Journal of Geography (81) 30-32
Satellite remote sensing provides us with a unique perspective from space. This perspective is synoptic in nature and provides regional views of most of the land areas of the earth. The orbital characteristics of the Landsat system are such that repetitive imagery of the same area may be obtained. Because...
Characterization of tropospheric desert aerosols at solar wavelengths by multispectral radiometry from Landsat
Joseph Otterman, R. S. Fraser, O. P. Bahethi
1982, Journal of Geophysical Research C: Oceans (87) 1270-1278
Characteristics of tropospheric desert aerosols are derived by comparing nadir spectral reflectivities computed from the radiative transfer models with reflectivities measured from Landsat. Over the ocean, reflectivities are compared, but over land the comparison is carried out by determining the ratios of the nadir reflectivity of the surface-atmosphere system over...
Deserts of China
Alta S. Walker
1982, American Scientist (70) 366-376
Improving arid land quality requires an understanding of the original state of the land and its relationship to wind, water, and plant regimes, as well as understanding of interactions within the present ecosystem.  Chinese scientists and local residents have made significant advances in improving arid environments in gobi and sandy...