Entry: am index
URI: https://terra-vocabulary.org/ncl/FAIR-Incubator/earthsciencevariables/c_0c18a9f4
am (type of index: K-derived planetary and hemispheric; time resolution: 3-hour (UT) interval; unit: nT; availability: from 1959 onwards) is derived from the K indices calculated at a network of 24 magnetic observatories situated close to 50° corrected geomagnetic latitude (in the subauroral zones) covering all longitudes. am was introduced to allow a characterization of global geomagnetic activity using a large set of stations representing all longitudes and possible hemispheric discrepancies. am and related derived geomagnetic indices (such as: an, as, Kpm, Am, An and As) are provided by the Ecole et Observatoire des Sciences de la Terre, Strasbourg, France. am time series is formally recognised and endorsed since 1969 by International Association of Geomagnetism and Aeronomy (IAGA).
Core metadata
| is a | Concept | observable property |
| changed on | 13 Nov 2023 10:22:13.231 |
| submitted by | Viqui Agazzi |
| accepted on | 29 Sep 2022 15:03:10.693 |
Download formats available
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All metadata properties
| date accepted |
29 Sep 2022 15:03:10.693
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| date submitted |
29 Sep 2022 14:56:15.635
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| definition |
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| item class |
Concept
| observable property
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| label |
am index
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| modified |
13 Nov 2023 10:22:13.231
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| notation |
c_0c18a9f4
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| register |
earthsciencevariables
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| status |
status experimental
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| submitter |
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| type |
register item
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| version info |
4
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Definition
| broader |
Solid earth
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| definition |
am (type of index: K-derived planetary and hemispheric; time resolution: 3-hour (UT) interval; unit: nT; availability: from 1959 onwards) is derived from the K indices calculated at a network of 24 magnetic observatories situated close to 50° corrected geomagnetic latitude (in the subauroral zones) covering all longitudes. am was introduced to allow a characterization of global geomagnetic activity using a large set of stations representing all longitudes and possible hemispheric discrepancies. am and related derived geomagnetic indices (such as: an, as, Kpm, Am, An and As) are provided by the Ecole et Observatoire des Sciences de la Terre, Strasbourg, France. am time series is formally recognised and endorsed since 1969 by International Association of Geomagnetism and Aeronomy (IAGA).
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| exact match |
V0010200
| b3283844 d867 4c2f 9917 a72bc06fd9ef
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| label |
am index
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| pref label |
am index
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| type |
Concept
| observable property
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