Publication: Largest GLE in half a century: Neutron monitor observations of the January 20, 2005 event
2
Issued Date
2005-01-01
Resource Type
Other identifier(s)
2-s2.0-84899017576
Rights
Mahidol University
Rights Holder(s)
SCOPUS
Bibliographic Citation
29th International Cosmic Ray Conference, ICRC 2005. Vol.1, (2005), 237-240
Suggested Citation
John W. Bieber, John Clem, Paul Evenson, Roger Pyle, Marc Duldig, John Humble, David Ruffolo, Manit Rujiwarodom, Alejandro Sáiz Largest GLE in half a century: Neutron monitor observations of the January 20, 2005 event. 29th International Cosmic Ray Conference, ICRC 2005. Vol.1, (2005), 237-240. Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/17191
Research Projects
Organizational Units
Authors
Journal Issue
Thesis
Title
Largest GLE in half a century: Neutron monitor observations of the January 20, 2005 event
Abstract
Within a 6-minute span on January 20, 2005, the count rate registered by a neutron monitor at the sea level station of McMurdo, Antarctica increased by a factor of 30, while the rate at the high-altitude (2820 m) site of South Pole increased by a factor of 56. The size of the increase at McMurdo qualifies it as the largest observed at sea level since the famous 1956 event, while the increase at South Pole may have been the largest (in percentage terms) ever registered by a neutron monitor. This paper uses data from the "Spaceship Earth" network of neutron monitors to characterize the time evolution of cosmic rays during the event. We also investigate spectral evolution using multiplicity data from a specially instrumented mobile monitor that was located in McMurdo Sound at the time of the event.