• 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.

    Data and Resources

    Metadata Source

    Harvested from NGDC - STP - Geomag - iso

    About this Dataset

    Resource Type Dataset
    Metadata Date May 28, 2013
    Metadata Created Date Aug 20, 2013
    Metadata Updated Date May 29, 2014
    Reference Date(s) May 13, 1998 (publication)
    Responsible Party DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce (Point of Contact)
    Contact Email
    Access Constraints ["Use Constraints: None", "Access Constraints: No Constraints"]
    Bbox East Long 180.000000
    Bbox North Lat 90.000000
    Bbox South Lat -90.000000
    Bbox West Long -180.000000
    Coupled Resource
    Frequency Of Update monthly
    Guid gov.noaa.ngdc.stp.geomag:G01183
    Harvest Object Id 8b05bb25-385f-44c3-9177-9c4ac457fb8b
    Harvest Source Id 21ab3ced-499d-4f59-bb62-448fe06ef827
    Harvest Source Title NGDC - STP - Geomag - iso
    Licence ["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."]
    Metadata Language
    Metadata Type geospatial
    Spatial {"type": "Polygon", "coordinates": [[[-180.0, -90.0], [180.0, -90.0], [180.0, 90.0], [-180.0, 90.0], [-180.0, -90.0]]]}
    Spatial Data Service Type
    Spatial Reference System
    Spatial Harvester True
    Temporal Extent Begin 1966-01-01

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