J. Space Weather Space Clim.
Volume 6, 2016
|Number of page(s)
|26 January 2016
Searching for Carrington-like events and their signatures and triggers
Space Research Group - Space Weather, Departamento de Física y Matemáticas, Universidad de Alcalá, 28871
Alcalá de Henares, Spain
* Corresponding author: firstname.lastname@example.org
Accepted: 3 January 2016
The Carrington storm in 1859 is considered to be the major geomagnetic disturbance related to solar activity. In a recent paper, Cid et al. (2015) discovered a geomagnetic disturbance case with a profile extraordinarily similar to the disturbance of the Carrington event at Colaba, but at a mid-latitude observatory, leading to a reinterpretation of the 1859 event. Based on those results, this paper performs a deep search for other “Carrington-like” events and analyses interplanetary observations leading to the ground disturbances which emerged from the systematic analysis. The results of this study based on two Carrington-like events (1) reinforce the awareness about the possibility of missing hazardous space weather events as the large H-spike recorded at Colaba by using global geomagnetic indices, (2) argue against the role of the ring current as the major current involved in Carrington-like events, leaving field-aligned currents (FACs) as the main current involved and (3) propose abrupt southward reversals of IMF along with high solar wind pressure as the interplanetary trigger of a Carrington-like event.
Key words: Interplanetary medium / Geomagnetism / Space weather / Storm / Indices
© E. Saiz et al., Published by EDP Sciences 2016
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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