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Dataset

HMC Index

Cite as:

Pick, Leonie; Korte, Monika (2018): HMC Index. V. 1.0. GFZ Data Services. http://doi.org/10.5880/GFZ.2.3.2018.006

Status

I   N       R   E   V   I   E   W : Pick, Leonie; Korte, Monika (2018): HMC Index. V. 1.0. GFZ Data Services. http://doi.org/10.5880/GFZ.2.3.2018.006

Abstract

The HMC (Hourly Magnetospheric Currents) index measures the activity of large-scale magnetospheric currents on Earth's surface from 1900 to 2015. It resolves the absolute intensity of low-frequency variations, especially at periods relevant to the solar cycle, more robustly than existing geomagnetic indices. HMC is based on hourly means of vector magnetic field measurements from 34 mid latitude geomagnetic observatories obtained from WDC Edinburgh (http://www.wdc.bgs.ac.uk/catalog/master.html). This data has been manually revised to correct for spikes, jumps and drifts. A detailed description of the derivation method is given in Pick et al., 2018 to which these data are supplementary material.

This directory contains the HMC index (hmc1900phor.hor) and the modified observatory data that it is based on (data.zip). The index and the observatory data files are formatted in compliance with the IAGA-2002 ASCII exchange format (https://www.ngdc.noaa.gov/IAGA/vdat/IAGA2002/iaga2002format.html).

Individual file names are composed of:
[IAGA code of observatory] + [first active year during 1900-2015] + [p(provisional)] + [hor(hourly)] + [_mod(modified)].hor

Also included is information on how the data modifications (list in modifications.pdf) were applied (readme.txt).

Dataset Contact

  • Pick, Leonie (Researcher) ; GFZ German Research Centre for Geosciences, Potsdam, Germany;

Contributors

Thomas, Yannik

Keywords

Geomagnetic observatories, External magnetic field, Magnetospheric currents

GCMD Science Keywords

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          • givenName: Leonie
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          • affiliation: GFZ German Research Centre for Geosciences, Potsdam, Germany
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          • givenName: Monika
          • familyName: Korte
          • nameIdentifier (nameIdentifierScheme=ORCID): 0000-0003-2970-9075
          • affiliation: GFZ German Research Centre for Geosciences, Potsdam, Germany
      • titles
        • title (xml:lang=en): HMC Index
      • publisher: GFZ Data Services
      • publicationYear: 2018
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        • subject: Geomagnetic observatories
        • subject: External magnetic field
        • subject: Magnetospheric currents
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          • givenName: Leonie
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          • nameIdentifier (nameIdentifierScheme=ORCID): 0000-0002-5266-9764
          • affiliation: GFZ German Research Centre for Geosciences, Potsdam, Germany
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          • givenName: Leonie
          • familyName: Pick
          • nameIdentifier (nameIdentifierScheme=ORCID): 0000-0002-5266-9764
          • affiliation: GFZ German Research Centre for Geosciences, Potsdam, Germany
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          • givenName: Monika
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          • nameIdentifier (nameIdentifierScheme=ORCID): 0000-0003-2970-9075
          • affiliation: GFZ German Research Centre for Geosciences, Potsdam, Germany
        • contributor (contributorType=Researcher)
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          • givenName: Yannik
          • familyName: Thomas
          • affiliation: GFZ German Research Centre for Geosciences, Potsdam, Germany
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        • date (dateType=Collected): 1915-01-01/2015-12-31T23:30:00
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            • eastBoundLongitude: 115.950
            • southBoundLatitude: -13.807
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          • awardNumber: 273423638
          • awardTitle: Separating multi-decadal internal geomagnetic secular variation and magnetospheric field variations
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      • Entry_ID: 10.5880/GFZ.2.3.2018.006
      • Entry_Title: HMC Index
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        • Dataset_Creator: Pick, Leonie; Korte, Monika
        • Dataset_Title: HMC Index
        • Dataset_Release_Date: 2018
        • Dataset_Release_Place: Potsdam, Germany
        • Dataset_Publisher: GFZ Data Services
        • Online_Resource: http://dx.doi.org/10.5880/GFZ.2.3.2018.006
      • Parameters
        • Category: EARTH SCIENCE
        • Topic: SOLID EARTH
        • Term: GEOMAGNETISM
        • Variable_Level_1: GEOMAGNETIC INDICES
      • Parameters
        • Category: EARTH SCIENCE
        • Topic: SUN-EARTH INTERACTIONS
        • Term: IONOSPHERE/MAGNETOSPHERE DYNAMICS
        • Variable_Level_1: MAGNETIC FIELDS/MAGNETIC CURRENTS
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        • Topic: SUN-EARTH INTERACTIONS
        • Term: IONOSPHERE/MAGNETOSPHERE DYNAMICS
        • Variable_Level_1: MAGNETIC STORMS
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      • Keyword: Geomagnetic observatories
      • Keyword: External magnetic field
      • Keyword: Magnetospheric currents
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        • Northernmost_Latitude: -43.267
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          • Long_Name: GFZ
        • Personnel
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          • Last_Name: Deutsches GeoForschungsZentrum GFZ
      • Summary
        • Abstract: The HMC (Hourly Magnetospheric Currents) index measures the activity of large-scale magnetospheric currents on Earth's surface from 1900 to 2015. It resolves the absolute intensity of low-frequency variations, especially at periods relevant to the solar cycle, more robustly than existing geomagnetic indices. HMC is based on hourly means of vector magnetic field measurements from 34 mid latitude geomagnetic observatories obtained from WDC Edinburgh (http://www.wdc.bgs.ac.uk/catalog/master.html). This data has been manually revised to correct for spikes, jumps and drifts. A detailed description of the derivation method is given in Pick et al., 2018 to which these data are supplementary material. This directory contains the HMC index (hmc1900phor.hor) and the modified observatory data that it is based on (data.zip). The index and the observatory data files are formatted in compliance with the IAGA-2002 ASCII exchange format (https://www.ngdc.noaa.gov/IAGA/vdat/IAGA2002/iaga2002format.html). Individual file names are composed of: [IAGA code of observatory] + [first active year during 1900-2015] + [p(provisional)] + [hor(hourly)] + [_mod(modified)].hor Also included is information on how the data modifications (list in modifications.pdf) were applied (readme.txt).
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  • escidoc:  /  download xml
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      • date (dateType=Created): 2018-10-01
      • creator
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        • givenName: Leonie
        • familyName: Pick
        • nameIdentifier (nameIdentifierScheme=ORCID): 0000-0002-5266-9764
        • affiliation: GFZ German Research Centre for Geosciences, Potsdam, Germany
      • creator
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        • givenName: Monika
        • familyName: Korte
        • nameIdentifier (nameIdentifierScheme=ORCID): 0000-0003-2970-9075
        • affiliation: GFZ German Research Centre for Geosciences, Potsdam, Germany

Location

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    Files

    License: CC BY 4.0