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    • Auroral Electrojet Index Designed to Provide a Global Measure, l-minute Intervals, of Auroral Zone Magnetic Activity

    Metadata Updated: September 16, 2022

    The Auroral Electrojet index (AE) is designed to provide a global quantitative measure of auroral zone magnetic activity produced by enhanced ionospheric currents flowing below and within the auroral oval. Ideally, it is the total range of deviation at an instant of time from quiet day values of the horizontal magnetic field (H) around the auroral oval. These indices are computed from a network of geomagnetic observations, some recording digitally and others as analog, which encircle the northern auroral zone. The AE computation uses horizontal magnetic field measured at 1-minute intervals. AE plus the supplemental indices AL, AU, and AO are contained in this data file. For earlier years, the AE indices were derived at 2.5 minutes. Also, hourly mean indices are calculated.

    Access & Use Information

    License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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    Dates

    Metadata Date September 18, 2015
    Metadata Created Date September 16, 2022
    Metadata Updated Date September 16, 2022
    Reference Date(s) January 1, 1976 (publication)
    Frequency Of Update irregular

    Metadata Source

    Harvested from NGDC STP Indices

    Additional Metadata

    Resource Type Dataset
    Metadata Date September 18, 2015
    Metadata Created Date September 16, 2022
    Metadata Updated Date September 16, 2022
    Reference Date(s) January 1, 1976 (publication)
    Responsible Party DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce (Point of Contact)
    Contact Email
    Guid gov.noaa.ngdc.stp.indices:G00114
    Access Constraints Use Constraints: None, Access Constraints: No Constraints
    Bbox East Long 180.00
    Bbox North Lat 90.00
    Bbox South Lat -90.00
    Bbox West Long -180.00
    Coupled Resource
    Frequency Of Update irregular
    Harvest Object Id 5475cfeb-84ac-4561-a3d1-828dc82c0c4a
    Harvest Source Id 8fcc91fb-3399-4b06-abea-b4dadb7df9b7
    Harvest Source Title NGDC STP Indices
    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.
    Metadata Language eng; USA
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": [[[-180.0, -90.0], [180.0, -90.0], [180.0, 90.0], [-180.0, 90.0], [-180.0, -90.0]]]}
    Progress underDevelopment
    Spatial Data Service Type
    Spatial Reference System
    Spatial Harvester True
    Temporal Extent Begin 1975-01-01

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