The Geomagnetic Kp Index and Derived Indices of Geomagnetic Activity
نویسندگان
چکیده
منابع مشابه
Time variations of geomagnetic activity indices Kp and Ap: an update
Kp and Ap indices covering the period 1932 to 1995 are analysed in a fashion similar to that attempted by Bartels for the 1932±1961 epoch to examine the time variations in their characteristics. Modern analysis techniques on the extended data base are used for further insight. The relative frequencies of occurrence of Kp with dierent magnitudes and the seasonal and solar cycle dependences are ...
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Data for geomagnetic activity index aa for 1868±1994 were subjected to spectral analysis for 12 intervals each of 11 consecutive years. In each interval, QBO and QTO (quasi-biennial and quasi-triennial oscillations) were observed at 2:00, 2.15, 2.40, 2.70 y and 3:20, 3.40 y, but not all in all intervals. These ̄uctuations are absent near (2±3 y before and after) the sunspot minima and are presen...
متن کاملCardiac Arrhythmia and Geomagnetic Activity
BACKGROUND The purpose of this paper is a review of a number of studies considering links between life threatening cardiac arrhythmias, sudden cardiac death (SCD) and the level of environmental physical activity factors like geomagnetic activity (GMA) and opposite them cosmic ray and high energy proton flux. This is a part of studies in the field named Clinical Cosmobiology. METHODS Temporal ...
متن کاملModelling Geomagnetic Activity Data
Strong geomagnetic activity is a hazard to electronics and electric power facilities. Assessment of the actual geomagnetic activity level from local magnetometer monitoring therefore is of importance for risk assessment but also in earth sciences and exploration. Wavelet based signal processing methods are applied to extract meaningful information from magnetic field time series in a noisy envi...
متن کاملSemiannual Variation of Geomagnetic Activity
The semiannual variation in geomagnetic activity is well established in geomagnetic data Its explanation has remained elusive, however. We propose, simply, that it is caused by a semiannual variation in the effective southward component of the interplanetary field. The southward field arises because the interplanetary field is ordered in the solar equatorial coordinate system, whereas the inter...
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ژورنال
عنوان ژورنال: Space Weather
سال: 2021
ISSN: 1542-7390,1542-7390
DOI: 10.1029/2020sw002641