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  • Springer  (2)
  • Tokyo : Dept. of Polar Research, National Science Museum  (1)
  • 1
    Series available for loan
    Series available for loan
    Space-time variation of aurora and geomagnetic disturbances : auroral observations at Syowa Station in Antarctica ; 1967 - 1968 (1970)
    Tokyo : Dept. of Polar Research, National Science Museum
    Associated volumes
    Details Availability
    Call number: ZSP-594/A-8
    In: Japanese Antarctic Research Expedition
    Description / Table of Contents: The program of auroral observations carried out by the 8th wintering party of the Japanese Antarctic Research Expedition, 1967-1968, consisted of 1. All-sky camera 2. Visual and photographic observations of aurora 3. Observation of auroral pulsations 4. Auroral photometry along the geomagnetic meridian 5. Observation of the auroral radio noise. Description of each observation and results obtained are briefly summarized in the following. 1. Space-time variations of aurora and geomagnetic disturbances A meridian scanning photometer was designed for investigating the time and space variations of auroral luminosity. The meridian time-sequence of auroral luminosity (4278Å) was derived from the data obtained by this photometer. Based on this meridian time-sequence of aurora, the space and time variations of aurora during the auroral substorms and the magnetic field variations associated with the auroral displays are investigated in detail. 2. Auroral pulsations A special photometer was designed for investigating the detailed characteristics of auroral pulsations and their relationships with geomagnetic pulsations. Auroral pulsations observed at Syowa Station can be classified into the following five types : A. Irregular fluctuations with large amplitudes observed mostly at the onset of an auroral substorm. B. Pulse-like auroral pulsations with a period of about 20-40 seconds. C. Long-lived auroral pulsations with a sinusoidal waveform. Their period and amplitude are about 10 seconds and a few KR, respectively. D. Rapid fluctuations of auroral luminosity with a period of about 0.5-2.0 seconds. E. Extremely rapid fluctuations with a frequency of about 20-30 Hz. Characteristics of each auroral pulsation are investigated and summarized.
    Type of Medium: Series available for loan
    Pages: 29 S. : überw. graph. Darst.
    Series Statement: Japanese Antarctic Research Expedition : Scientific reports : Series A, Aeronomy 8
    URL: https://nipr.repo.nii.ac.jp/?action=repository_opensearch&index_id=310
    Branch Library: AWI Library
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  • 2
    Electronic Resource
    Electronic Resource
    Seismic activity of Erebus volcano, antarctica (1987)
    Springer
    Pure and applied geophysics 125 (1987), S. 993-1008 
    Details
    ISSN: 1420-9136
    Keywords: Antarctica ; Erebus Volcano ; seismicity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Mount Erebus is presently the only Antarctic volcano with sustained eruptive activity in the past few years. It is located on Ross Island and a convecting anorthoclase phonolite lava lake has occupied the summit crater of Mount Erebus from January 1973 to September 1984. A program to monitor the seismic activity of Mount Erebus named IMESS was started in December 1980 as an international cooperative program among Japan, the United States and New Zealand. A new volcanic episode began on 13 September, 1984 and continued until December. Our main observations from the seismic activity from 1982–1985 are as follows: (1) The average numbers of earthquakes which occurred around Mount Erebus in 1982, 1983 and January–August 1984 were 64, 134 and 146 events per day, respectively. Several earthquake swarms occurred each year. (2) The averag number of earthquakes in 1985 is 23 events per day, with only one earthquake swarm. (3) A remarkable decrease of the background seismicity is recognized before and after the September 1984 activity. (4) Only a few earthquakes were located in the area surrounding Erebus mountain after the September 1984 activity. A magma reservoir is estimated to be located in the southwest area beneath the Erebus summit, based on the hypocenter distributions of earthquakes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00879364
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    Seismic activity of Erebus volcano, antarctica (1987)
    Springer
    Details
    Publication Date: 1987-01-01
    Print ISSN: 0033-4553
    Electronic ISSN: 1420-9136
    Topics: Geosciences , Physics
    Published by Springer
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