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Sanford, Allan R.

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Journal Article
Published: 07 December 2016
Seismological Research Letters (2017) 88 (1): 4–5.
...Hans Hartse © Seismological Society of America Allan (Al) R. Sanford, professor of geophysics, emeritus, at New Mexico Tech (NMT) passed away quietly at his home in Woodinville, Washington, on 9 August 2016. He was 89. Al was a pioneer in the recording and interpretation...
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<span class="search-highlight">Allan</span> <span class="search-highlight">R</span>. <span class="search-highlight">Sanford</span> (1927–2016)
Published: 07 December 2016
Figure 1. Allan R. Sanford (1927–2016)
Series: DNAG, Continent-Scale Map Series
Published: 01 January 1991
DOI: 10.1130/DNAG-CSMS-NEO.229
EISBN: 9780813754239
.... 1). This definition was adopted by Sanford and others (1972) in an early paper on the seismicity of the rift. Included in that paper were instrumental data for the period 1960 through 1970. For the 11-yr period, only about 30 percent of all earthquakes in New Mexico with magnitude greater than 2.7...
Journal Article
Published: 01 June 1976
Bulletin of the Seismological Society of America (1976) 66 (3): 877–886.
...Tousson R. Toppozada; Allan R. Sanford abstract Interpretation of a seismic profile extending 548 km southward from the GASBUGGY nuclear test of December 10, 1967 resulted in a crustal model for central New Mexico. The crust is 39.9 km thick below the Paleozoic “basement”. It consists of an upper...
Journal Article
Published: 01 December 1973
Bulletin of the Seismological Society of America (1973) 63 (6-1): 2021–2034.
...Allan R. Sanford; Ömer Alptekin; Tousson R. Toppozada Abstract Microearthquake seismograms recorded by stations located in or bordering the Rio Grande rift near Socorro, New Mexico, frequently have two sharp impulsive phases following direct S . These phases have been identified as S x P and S x S...
Journal Article
Published: 01 February 2001
Bulletin of the Seismological Society of America (2001) 91 (1): 82–93.
...Kuo-wan Lin; Allan R. Sanford Abstract A simple procedure is presented to resolve locations of regional earthquakes with poor quality of recorded phases and/or a very large gap in seismograph recording geometry. In solving earthquake locations, we use a modified G matrix containing S - P time...
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Journal Article
Published: 01 February 1997
Bulletin of the Seismological Society of America (1997) 87 (1): 174–182.
...Robert S. Balch; Hans E. Hartse; Allan R. Sanford; Kuo-wan Lin Abstract For 35 years, strong reflected phases from the sill-like, mid-crustal Socorro magma body ( SMB ) have been observed on microearthquake seismograms recorded in the central Rio Grande rift, New Mexico. In 1979, the lateral extent...
Journal Article
Published: 01 December 1992
Bulletin of the Seismological Society of America (1992) 82 (6): 2511–2532.
...Hans E. Hartse; Allan R. Sanford; John S. Knapp Abstract When network station spacing is large relative to event depths, constraining focal depths using direct arrivals is difficult. To help overcome this problem, we incorporated the SzS, SzP, and PzP Socorro magma body reflections...
Journal Article
Published: 01 April 1981
Bulletin of the Seismological Society of America (1981) 71 (2): 437–450.
...Eric J. Rinehart; Allan R. Sanford abstract The existence of impulsive S to S -wave ( S z S ) reflections off an extensive sillshaped magma body on many local microearthquake seismograms near Socorro, New Mexico, allowed a straight-forward least-squares inversion to determine an S -wave velocity...
Journal Article
Published: 01 August 1972
Bulletin of the Seismological Society of America (1972) 62 (4): 917–926.
...Surendra Singh; Allan R. Sanford Abstract Five year of data for microearthquakes originating in a small volume of crust near Socorro, New Mexico were analyzed to determine the temporal behavior of (1) the average number of shocks per unit time, (2) the slope of the earthquake-frequency graph...
Journal Article
Published: 01 August 1970
Bulletin of the Seismological Society of America (1970) 60 (4): 1209–1219.
...Merle E. Hanson; Allan R. Sanford abstract A numerical technic is used to simulate the two-dimensional elastic dynamic characteristics of a bilateral tensile fracture that accelerates, propagates and stops in an elastic continuum. The fracture-velocity function is specified for the calculation...
Journal Article
Published: 01 April 1968
Bulletin of the Seismological Society of America (1968) 58 (2): 639–644.
...Allan R. Sanford; Surendra Singh Abstract The minimum microearthquake recording time needed to determine short-term seismicity (10 years) has been established for regions having the same degree of activity as Socorro (400 shocks with M ≧ 0 each year). An analysis of more than five years...
Journal Article
Published: 01 February 1968
Bulletin of the Seismological Society of America (1968) 58 (1): 325–338.
...Allan R. Sanford; Ara G. Carapetian; Leland T. Long abstract Trains moving through the Rio Grande Valley at Socorro are a known isolated source of short-period microseisms. Power spectra at five different locations indicate that the train noise is confined to a narrow band (< 3 cps...
Journal Article
Journal: GSA Bulletin
Published: 01 January 1959
GSA Bulletin (1959) 70 (1): 19–52.
...ALLAN R SANFORD Abstract An analytical method is derived which gives the elastic response of a homogeneous rock layer to two-dimensional distributions of vertical displacement applied along its lower boundary. Displacement field, stress distribution, and distortional strain-energy density diagrams...
Journal Article
Published: 01 December 1968
Bulletin of the Seismological Society of America (1968) 58 (6): 2079–2089.
... Carapetian, Ara G., Allan R. Sanford and Leland T. Long--High Frequency Microseims from a Known Source 325 Careaga, Jose and Luis M. Fernandez--The Thickness of the Crust in Central United States and La Paz, Bolivia, from the Spectrum of Longitudinal Seismic Waves . . . . . . . . . . . . . . . . . 711...
Journal Article
Published: 01 December 1973
Bulletin of the Seismological Society of America (1973) 63 (6-1): 2211–2225.
... Studies 2167 Alp~ekin, ()mer, Allan R. Sanford and Tousson R. Toppozada--Use of Reflection Phases on Microearthquake Seismograms to Map an Unusual Discontinuity Beneath the Rio Grande Rift 2021 Alterman, Z. and A. Ungar--Acoustic-Wave Propagation from a MOving Point Source 1937 Amplitude-Yield Scaling...
Journal Article
Published: 01 December 1965
Bulletin of the Seismological Society of America (1965) 55 (6): 1065–1070.
..., by Allan R. Sanford and L. T. Long 579 Mikumo, Takeshi--Crustal Structure in Central California in Relation to the Sierra Nevada 65 N o r t h r o p , J o h n - - T Phases from 80 Alaskan E a r t h q u a k e s , M a r c h 28-31, 1964 . . . . . . . . . . . 59 1068 BULLETIN OF THE SEISMOLOGICAL SOCIETY...
Journal Article
Published: 01 October 1978
Bulletin of the Seismological Society of America (1978) 68 (5): 1533–1535.
... 1972, and check if the correspondence is also seen elsewhere. ACKNOWLEDGMENTS The author is very grateful to Prof. Allan R. Sanford of New Mexico Institute of Mining and Technology,Socorro,New Mexico,for the use of the microearthquake data and many helpful comments. REFERENCES Afanas'yeva,V. I. (1963...
Journal Article
Published: 01 December 1970
Bulletin of the Seismological Society of America (1970) 60 (6): 2101–2112.
... Data from the Vicinity of the Borrego Mountain, California, Earthquake of 9 April 1968 367 Hanson, Merle E. and Allan R. Sanford--A Two-Dimensional Source Function for a Dynamic Brittle Bilateral Tensile Crack 1209 Harkrider, David GSurface Waves in Multilayered Elastic Media. II. Higher Mode Spec- tra...
Journal Article
Published: 06 May 2014
The Journal of Geology (2014) 122 (3): 259–282.
.... R. Dix. A review by W. Harrison helped clarify our interpretations and improve the manuscript. References Cited Allan , J. R. , and Wiggins , W. D. 1993 . Dolomite reservoirs . Continuing Education Series 36. Tulsa, OK, Am. Assoc. Petrol. Geol. Allen , P. A. , and Allen...
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