Pressure Waves Produced by the Nuclear Explosion on October 30, 1961-Preliminary Report

Murayama, N.

doi:10.2151/jmsj1923.40.4_222

Cited by 3 publications

(8 citation statements)

References 8 publications

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“…The effect of the size of explosion on the appearance of a microbarogram is well illustrated in that presented by Murayama (1963b) recorded at Wakkanai on 24 December 1962 when a large explosion was preceded by a smaller one. For the smaller explosion short-period waves have a greater amplitude than long-period waves, whereas for the larger explosion the opposite is true and the greatest amplitude occurs in the initial long-period cycle.…”

Section: Some Determining Factorsmentioning

confidence: 72%

“…The dispersion curves of total wave-trains, which would correspond to the real dispersion curves given by Murayama (1962), are a composite of dispersion curves for all contributing modes and so would not generally be well-represented by the dispersion curve of the So mode by itself. This is especially relevant at periods less than 2 min.…”

Section: Resultsmentioning

confidence: 99%

“…For higher-order acoustic modes both inverse and normal dispersion may be observable at the ground and the former may Murayama (1963a) indicates that the inversely dispersed portion of the higher acoustic modes may have the predominating amplitudes in practice as well as in theory.…”

Section: Resultsmentioning

confidence: 99%

“…Two groups of Japanese records are considered below : those presented by Yamamoto (1954, 1957a, 1957b) for explosions in the Marshall Islands between 1952 and 1956, and those presented by Murayama (1963aMurayama ( , 1963b 1954, 26 April 1954and 5 May 1954 indicate the presence of two major wave-trains, one of period (4 min) followed by one of shorter period (11/2-2 min).…”

Section: Analysis Of Microbarogramsmentioning

confidence: 99%

“…Since that time many microbarographic recordings associated with such explosions have been presented in Japan (Yamamoto 1957a(Yamamoto , 1957bMurayama 1962Murayama , 1963aMurayama , 1963b and elsewhere (Donn, Pfeffer and Ewing 1963;Bhartendu and Currie 1964;and others).…”

Section: Introductionmentioning

confidence: 99%

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Effects of Winds on Atmospheric Pressure Waves Produced by Hydrogen Bombs

MacKinnon

1968

Journal of the Meteorological Society of Japan

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Numerical evaluations of theoretical expressions for ground pressure waves due to explosions in the atmosphere are presented for a model atmosphere containing winds. Various wind conditions are studied and distinction is made between winds of the upper and lower atmosphere. It is found that wave speed and amplitude depend on wind conditions, so that any analysis of microbarograms must take into account prevailing wind conditions. Previously published records are studied in the light of the new results presented.

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Section: Some Determining Factorsmentioning

confidence: 72%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Analysis Of Microbarogramsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of Winds on Atmospheric Pressure Waves Produced by Hydrogen Bombs

MacKinnon

1968

Journal of the Meteorological Society of Japan

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Microbarographic oscillations produced by nuclear explosions as recorded in Great Britain and Eire

MacKinnon

1968

Quart J Royal Meteoro Soc

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A summary is presented of previously unpublished microbarographic data associated with atmosphere thermonuclear bomb tests in the Marshall Islands and in the Soviet Union from 1954 to 1962. Some effects of winds upon atmospheric pressure waves are indicated through study of wind conditions over the paths of propagation and through comparison with reported Japanese data. It is shown that, as well as the speed of the waves, the maximum amplitudes of wave-trains depend upon wind conditions so that estimates of the size of explosions must take into account prevailing winds. The possible usefulness of microbarograms in the study of upper atmospheric winds is indicated. 1, INTRODUCTIONSince 1954 it has been known that atmospheric pressure waves moving with the speed of sound are generated by atmospheric nuclear explosions and that these waves are readily observable on microbarographs of moderate sensitivity (Yamamoto 1954(Yamamoto , 1955. Such waves had been observed previously in connection with the Krakatoa eruption of 1883 (Symonds 1888) and with the Siberian meteorite of 1908 (Whipple 1930). Interest in pressure waves from nuclear explosions was heightened through the nature of their generation. Microbarographic records were used to estimate location and size of explosions.It was seen that predictions of periods of abnormally great radioactive fall-out could be made in the absence of official announcements of bomb tests. In Great Britain a great amount of public interest was expressed in the Soviet explosion of 30 October 1961 because of its magnitude (60 megatons) and photographs of recordings of seismic and atmospheric waves were reproduced in London newspapers. Subsequent reports of a more scientific nature were made by Jones (1962) and by Carpenter, Harwood and Whitehead (1961) of the Atomic Weapons Research Establishment. It was noted that in addition to the direct (A,) waves, antipodal (A,) waves and (A3) waves which had made a full global passage were also detected from this explosion. Reports of British recordings for other explosions have been made by Hunt, Palmer and Penney (1960) and Jones and Forbes (1862). Many microbarograms showing pressure waves recorded in locations throughout the world have been published by : Yamamoto (1954Yamamoto ( , 1955Yamamoto ( , 1956aYamamoto ( , 1956bYamamoto ( , 1957aYamamoto ( , 1957b, Murayama (1962, 1963a, 1963b, 1965), Farkas (1962, Wexler and Hass (1962), Toperczer (1962), Donn and Ewing (1962a, 1962b), Donn, Pfeffer and Ewing (1963, Bhartendu and Currie (1964), among others. A useful summary of Japanese records has been given by Murayama (1965). There now exists a great amount of published information on these waves and it is probable that a great amount of unpublished and/or neglected data exists. In this regard it is unlikely that more useful recordings are available from the Atomic Weapons Establishment at Southend-on-Sea (private communication). Some records of the type reported by Jones (1962) may become available in future but at the time of writing ...

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Bibliography on Infrasonic Waves

Thomas

Pierce

Flinn

et al. 2010

Geophysical Journal of the Royal Astronomical Society

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The following bibliography is current through 1970 and is composed of references related to the generation, propagation and detection of sound radiation at ground level and ionospheric heigbts. The frequency range of the pressure signals considered here encompasses those normally associated with acoustic, infrasonic, acousticgravity and gravity waves.As an aid in locating references the material has been broken into a number of subject categories which are given below. Each entry is listed only under the subject that is considered to be the primary topic of the paper. Subject categoryanalysis of data.of acoustic, infrasonic, acoustic-gravity, and gravity waves.waves.I. Papers related to the design and description of instrumentation and to the 11. Papers in which the primary topic is the source mechanisms for the generation 111. Papers related to the measurement, observation, and theory of ionospheric IV. Ground-level observations of pressure waves. V. Theoretical papers on atmospheric pressure waves. This bibliography resulted from a combination of individual bibliographies by each of the authors and from contributions of many others that attended a recent Infrasonic Workshop held at

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Pressure Waves Produced by the Nuclear Explosion on October 30, 1961-Preliminary Report

Cited by 3 publications

References 8 publications

Effects of Winds on Atmospheric Pressure Waves Produced by Hydrogen Bombs

Effects of Winds on Atmospheric Pressure Waves Produced by Hydrogen Bombs

Microbarographic oscillations produced by nuclear explosions as recorded in Great Britain and Eire

Bibliography on Infrasonic Waves

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