Entry: Dst index
URI: https://terra-vocabulary.org/ncl/FAIR-Incubator/earthsciencevariables/c_be3f6e1e
Name "Dst" came from "Disturbance storm-time". Dst (type of index: Equatorial index horizontal component disturbances; time resolution: 1-hour UT interval; unit: nT; availability: from 1957 onwards) is computed using 1-hour values from four low latitude observatories. Dst aims at monitoring the axis-symmetric magnetic signature of magnetosphere currents, including mainly the ring current, the tail currents and also the magnetopause Chapman-Ferraro current. At a given time, the Dst index is the average of variation over all longitudes; the reference level is set so that Dst is statistically zero on quiet days. An index of -50 or deeper indicates a storm-level disturbance, and an index of -200 or deeper is associated with middle-latitude auroras. Dst is determined by the World Data Center for Geomagnetism, Data Analysis Center for Geomagnetism and Space Magnetism, Kyoto University, Kyoto Japan. Dst time series is formally recognised and endorsed since 1969 by IAGA.
Core metadata
| is a | Concept | observable property |
| changed on | 13 Nov 2023 10:22:13.206 |
| submitted by | Viqui Agazzi |
| accepted on | 29 Sep 2022 15:03:11.826 |
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All metadata properties
| date accepted |
29 Sep 2022 15:03:11.826
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| date submitted |
29 Sep 2022 14:56:15.991
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| definition |
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| item class |
Concept
| observable property
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| label |
Dst index
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| modified |
13 Nov 2023 10:22:13.206
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| notation |
c_be3f6e1e
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| register |
earthsciencevariables
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| status |
status experimental
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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 |
Name "Dst" came from "Disturbance storm-time". Dst (type of index: Equatorial index horizontal component disturbances; time resolution: 1-hour UT interval; unit: nT; availability: from 1957 onwards) is computed using 1-hour values from four low latitude observatories. Dst aims at monitoring the axis-symmetric magnetic signature of magnetosphere currents, including mainly the ring current, the tail currents and also the magnetopause Chapman-Ferraro current. At a given time, the Dst index is the average of variation over all longitudes; the reference level is set so that Dst is statistically zero on quiet days. An index of -50 or deeper indicates a storm-level disturbance, and an index of -200 or deeper is associated with middle-latitude auroras. Dst is determined by the World Data Center for Geomagnetism, Data Analysis Center for Geomagnetism and Space Magnetism, Kyoto University, Kyoto Japan. Dst time series is formally recognised and endorsed since 1969 by IAGA.
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| exact match |
V0010400
| cdb4b514 75c4 4a1f a4ad 1855fbd396ab
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| label |
Dst index
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| pref label |
Dst index
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| type |
Concept
| observable property
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