Geomagnetic records of Carrington's storm from Guatemala
Geomagnetic records of Carrington's storm from Guatemala
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危地马拉卡林顿风暴的地磁记录
DOI：
10.1016/j.jastp.2009.12.017
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发表时间：
2011
影响因子：
1.9
通讯作者：
R. Trigo
中科院分区：
文献类型：
--
作者：
P. Ribeiro;J. Vaquero;R. Trigo
本研究利用危地马拉气象台大约在风暴发生前2年的地磁赤纬(D)观测资料，重新考察了卡林顿风暴。可用的每月绝对值（日变化）数据涵盖1857年5月（4月）至1859年12月。月均值的时间演变分析证实了其总体质量较好。此外，我们还分析了1859年8月28日和9月2日两个暴风雨日高度相关的准小时赤纬资料，包括这两个暴风雨日极光观测的补充资料。准时资料显示，在1859年9月2日12 - 13时（UT），地磁偏角发生了极大偏差（18′）。将这一扰动与其他低纬度站点在最近的主要地磁风暴期间记录的D的最大每小时变化进行比较，表明危地马拉数据的可靠性。此外，它还进一步证实了卡灵顿大风暴的全球规模。
The present study revisits the Carrington’s storm using the observations of geomagnetic declination (D) made in the meteorological observatory of Guatemala approximately during the 2 years preceding the storm. The available monthly data for absolute values (diurnal variation) cover the period that spans between May (April) 1857 and December 1859. The analysis of the temporal evolution of monthly means confirmed its overall good quality. Additionally, highly relevant quasi-hourly declination data was analysed for the 2 stormy days of 28 August and 2 September 1859, including complementary information on the auroral sightings on those days. The quasi-hourly data shows that an extremely large deviation (18′) of the geomagnetic declination occurred at 12–13h (UT) on the 2 September 1859. The comparison of this disturbance with the maximum hourly variations of D recorded at other low-latitude stations during more recent major geomagnetic storms shows the reliability of the Guatemala data. Furthermore, it provides an additional confirmation of the global scale of the great Carrington’s storm.