CHARACTERISTICS AND FINE STRUCTURE OF THE LARGE COSMIC-RAY FLUCTUATIONS IN NOVEMBER 1960

Journal Article · Mon May 01 04:00:00 EDT 1961 · J. Geophys. Research

DOI:https://doi.org/10.1029/JZ066i005p01363· OSTI ID:4011510

Stelies, J F; Carmichael, H; McCracken, K G

Measurements obtained at Deep River, Canada, from two large neutron monitors, and at Cambridge, Massachusetts, from a high counting rate meson monitor, during the solar cosmic-ray injections of November 12 and 15, 1960, are reported. In addition, rate-meter pen traces of the neutron increases and a magnetometer trace of H, obtained at Deep River, are reproduced. The solar cosmic-ray increase of November 12 appears to be unique in that while it was in progress a sharp Forbush decrease happened to occur as shown by the MIT meson intensity. Half an hour before the onset of the Forbush decrease, and coincident with a conspicuous increase of H, the intensity of the solar cosmic radiation doubled and then exhiblted strong rapid oscillations. Arguments are advanced that the changes of intensity of the solar cosmic rays observed at high latitudes at the time of the magnetic disturbance and Forbush decrease are due to the earth sampling solar cosmic rays trapped in the gas cloud responsible for these latter effects. The events of November 12 and 15 are both shown to be in agreement with a recent model for the magnetic fields in the inner solar system. At the time of the solar cosmic-ray increase of November 15, the earth was already inside a trapping region, and periodic osclllations of the solar cosmic-ray intensity were observed lasting for about 2 hours. It is suggested that these oscillations may be closely connected with the storage mechanism. (auth)

• Research Organization: Atomic Energy of Canada Ltd., Chalk River, Ont.
• Sponsoring Organization: USDOE
• NSA Number: NSA-15-018635
• OSTI ID: 4011510
• Journal Information: J. Geophys. Research, Journal Name: J. Geophys. Research Vol. Vol: 66
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

COINCIDENCE METHODS
COSMIC RADIATION
COUNTERS
DISTURBANCES
EARTH
FORBUSH DEPRESSION
MAGNETIC FIELDS
MAGNETOMETERS
MEASURED VALUES
MESONS
MONITORING
NEUTRON DETECTION
OSCILLATIONS
PHYSICS
PLASMA
PRODUCTION
RATE METERS
RECORDING SYSTEMS
STORAGE
SUN
TURBULENCE
VARIATIONS