| A Space-Based Proxy for the Dst Index |
18 MAY 2007 |
8 pages |
| Authors:
F. J. Rich; J. M. Bono; W. J. Burke; L. C. Gentile; AIR FORCE RESEARCH LAB HANSCOM AFB MA
|
 | The Dst index was created to monitor and quantify disturbances in the inner magnetosphere using ground-based, magnetic field measurements. The phases and strengths of geomagnetic storms are usually defined by the evolution of Dst. The standard Dst database is computed and maintained at the World Data Center for Geomagnetism, Kyoto. We demonstrate that the Dst index can also be approximated using magnetometers on spacecraft in near-Earth orbit. Measurements used in ... |
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| A Relativistic Solar Proton Database for the Ground-Level Enhancements of 1956-1984. |
06 APR 1994 |
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| Authors:
L. C. Gentile; J. M. Campbell; N. A. Vickers; S. M. Jacavanco; M. A. Shea; BOSTON COLL CHESTNUT HILL MA INST FOR SPACE RESEARCH
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 | In order to establish a consistent, computerized database for relativistic solar proton event studies and to preserve records that might otherwis be lost, we have been compiling data from the international network of neutron monitors for the Ground-Level Enhancements of 1956-1984. Data were gathered from a variety of sources, primarily published data reports and the archives of WDC-A for Solar-Terrestrial Physics and WDC-C1 and WDC-C2 for Cosmic Rays. We found ... |
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| X-Class Soft X-Ray Bursts and Major Proton Events During Solar Cycle 22 (1987-1991). |
05 APR 1994 |
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| Authors:
L. C. Gentile; J. M. Campbell; E. W. Cliver; H. V. Cane; BOSTON COLL CHESTNUT HILL MA INST FOR SPACE RESEARCH
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| We compiled a list of all major solar proton events (J(> 10 MeV) > or = 10 pr sq cm s(-1) sr(-1) observed during the first half of Solar Cycle 22 (January 1987 - September 1991) and their flare associations. We also tablulated all X-class soft X-ray bursts observed during this period and studied the intersection of the two data sets. In particular we examined the usefulness of the e-folding ... |
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| The Relativistic Solar Proton Event of 15 June 1991. |
25 MAR 1994 |
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| Authors:
D. F. Smart; M. A. Shea; L. C. Gentile; PHILLIPS LAB HANSCOM AFB MA
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| The X12/3B solar flare that occurred at heliographic coordinates N33, W69 in NOAA region 6659 on 15 June 1991 commencing at 0810 UT was the source of a number of energetic phenomena. In addition to the intense X-ray and gamma ray emission, and probable neutron emission, the flare phenomena also accelerated ions to relativistic energies. The long duration associated GLE observed at the earth was essentially isotropic during the maximum ... |
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| Relativistic Solar Particle Events Recorded by the Lomnicky Stit Neutron Monitor. |
25 MAR 1994 |
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| Authors:
K. Kudela; M. A. Shea; D. F. Smart; L. C. Gentile; PHILLIPS LAB HANSCOM AFB MA
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| Using the cosmic radiation measurements obtained by the Lomnicky Stit neutron monitors since 1964, data recorded during each of the 38 reported relativistic solar cosmic ray events have been assembled. A summary of these measurements is given together with comments about the unique solar neutron measurements in 1982. Events in the 19th solar cycle are also discussed. |
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| The Relativistic Solar Proton Event of 11 June 1991. |
25 MAR 1994 |
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| Authors:
D. F. Smart; M. A. Shea; L. C. Gentile; PHILLIPS LAB HANSCOM AFB MA
|
| The X12/3B solar flare that occurred at heliographic coordinates N31, W17 in NOAA region 6659 on 11 June 1991 commencing at 0156 UT was the source of a number of energetic phenomena including intense X-ray and gamma ray emission and the acceleration of ions to relativistic energies. The small associated ground-level enhancement (GLE) of about 6 hours duration was mildly anisotropic even though a geomagnetic storm was in progress. The ... |
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| The Relativistic Solar Proton Ground-Level Enhancements Associated with the Solar Neutron Events of 11 June and 15 June 1991. |
25 MAR 1994 |
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| Authors:
D. F. Smart; M. A. Shea; L. C. Gentile; PHILLIPS LAB HANSCOM AFB MA
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| The solar cosmic ray ground-level enchancements (GLEs) observed on 11 and 15 June 1991 were distinctly different in character. The small GLE on 11 June was mildly anisotropic with approximately 2-to-1 ratio in the relativistic proton flux observed by 'forward viewing' high latitude neutron monitors as compared with the flux observed by 'reverse viewing' high latitude neutron monitors. In contrast the 15 June GLE was almost isotropic in spite of ... |
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| The Relativistic Solar Proton Ground-Level Enhancements Associated with the Solar Neutron Events of 11 June and 15 June 1991 |
1994 |
9 pages |
| Authors:
D. F. Smart; M. A. Shea; L. C. Gentile; PHILLIPS LAB HANSCOM AFB MA
|
| The Solar Cosmic Ray Ground-Level Enhancements (GLEs) observed on 11 and 15 June 1991 were distinctly different in character. The small GLE on 11 June was mildly anisotropic with an approximately 2-to-1 in the relativistic proton flux observed by 'forward viewing' high latitude neutron monitors as compared with the flux observed by 'reverse viewing' high latitude neutron monitors. In contract the 15 June GLE was almost isotropic in spite of ... |
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| Relativistic Solar Particle Events Recorded by the Lomnicky Stit Neutron Monitor |
1993 |
5 pages |
| Authors:
K. Kudela; M. A. Shea; D. F. Smart; L. C. Gentile; PHILLIPS LAB HANSCOM AFB MA
|
| Using the cosmic radiation measurements obtained by the Lomnicky Stit neutron monitors since 1964, data recorded during each of the 38 reported relativistic solar cosmic ray events have been assembled. A summary of these measurements is given together with comments about the unique solar neutron measurements in 1982. Events in the 19th solar cycle are also discussed. Neutron monitors, Ground-level events, Cosmic rays, Solar protons. |
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| The Relativistic Solar Proton Event of 11 June 1991 |
1993 |
5 pages |
| Authors:
D. F. Smart; M. A. Shea; L. C. Gentile; PHILLIPS LAB HANSCOM AFB MA
|
| The X12/38 solar flare that occurred at heliographic coordinates N31, Wl7 in NOAA region 6659 on 11 June 1991 commencing at 01 56 UT was the source of a number of energetic phenomena including intense X-ray and gamma ray emission and the acceleration of ions to relativistic energies. The small associated ground-level enhancement (GLE) of about 6 hours duration was mildly anisotropic even though a geomagnetic storm was in progress. ... |
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| The Relativistic Solar Proton Event of 15 June 1991 |
1993 |
5 pages |
| Authors:
D. F. Smart; M. A. Shea; L. C. Gentile; PHILLIPS LAB HANSCOM AFB MA
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