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Geomagnetic Principal Magnetic Storms

The abbreviations used for observatory names are as follows: GEOMAGNETIC OBSERVATORIES Code Station Geomagnetic Latitude ABG Alibag AMS Martin de Vivie. These data present the principal magnetic storms for the month as reported by several observatories through cooperation with the International Association of Geomagnetism and Aeronomy (IAGA). These are the data formerly published in the Journal of Geophysical Research. They are now, however, grouped by the storm rather than by station. The geomagnetic latitude of the station is indicated. The beginning time is given to the hour and minute in UT. The tupe of sudden commencement, if any, together with its magnitude in each element D, H or Z is next in the format: sc = sudden commencement; sc* = small initial impulse followed by main impulse (in this case the amplitude is that of the main pulse only, neglecting the initial brief pulse); dots in these columns represent a stomr with gradual commencement; blanks indicate no data entries. Signs of amplitudes of D and Z are taken albegraically; D reckoned positive if toward the east and Z reckoned positive if vertically downward. In the next columns the day and the three-hour periods on that day when the K index reached its maximum are given followed by the K index value. In the next three columns the maximum ranges in D, H and Z during the storm are given. The ending time is given only to the nearest hour. This is the time of cessation of reasonably marked disturbance movements in the trace. More specifically, it is the time when the K index measure has diminished to 2 or less for a reasonable period. For each date the data are listed in north-to-south geomagnetic latitude order.

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    Distribution Formats
    • ASCII
    Distributor Distributor information not available
    No point of contact available for this dataset
    Documentation links not available.
    • DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
    • DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
    • publication: 1998-05-13
    Edition: First
    Dataset Progress Status Under development
    Data Update Frequency: Monthly
    Supplemental Information: The observatories reporting are listed below the table each month in SGD. s 42.9S ANN Annamalainagar 1.5N API Apia 16.0S BJI Beijing 28.5N CAN Canberra 43.9S CMO College 64.6N CZT Port Alfred 38.5S DRV Dumont d'Urville (Terre Adelie) 75.6S ETT Etaiyapuram 00.6S FRD Fredericksburg 49.6N GNA Gnangara 43.2S GUA Guam 4.0N HER Hermanus 33.7S HON Honolulu 21.1N HYB Hyderabad 7.6N JAI Jaipur 17.3N KRC Karachi 16.4N PAF Port aux Francais (Kerguelen) 56.5S PMG Port Moresby 18.6S SHL Shillong 14.7N SIT Sitka60.0N TRD Trivandrum 1.1S UJJ Ujjain 13.5N
    Purpose: Monitor Geomagnetic Activity Caused by Solar Wind
    Use Limitations
    • While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.
    Time Period: 1966-01-01  to  Present
    Spatial Bounding Box Coordinates:
    N: 90.000000
    S: -90.000000
    E: 180.000000
    W: -180.000000
    Spatial Coverage Map:
    • EARTH SCIENCE > SOLID EARTH > Geomagnetism - Geomagnetic Indices
    • Principal Magnetic Storms
    • Geomagnetic Field
    • Azimuthal Component
    • Global
    • Magnetosphere
    • ICSU-WDS > International Council for Science - World Data System
    Use Constraints
    • Use Constraints: None
    Access Constraints
    • Access Constraints: No Constraints
    • Depends on the Data Set
    Lineage Statement Lineage statement not available.

    Metadata Last Modified: 2015-09-18

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