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
CharacterString: GFZ German Research Centre for Geosciences
contactInfo
CI_Contact
address
CI_Address
electronicMailAddress
CharacterString:
onlineResource
CI_OnlineResource
linkage
URL: http://www.gfz-potsdam.de/
function
CI_OnLineFunctionCode (codeList=http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode codeListValue=information): information
CharacterString: 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).
Variable_Level_1: MAGNETIC FIELDS/MAGNETIC CURRENTS
Parameters
Category: EARTH SCIENCE
Topic: SUN-EARTH INTERACTIONS
Term: IONOSPHERE/MAGNETOSPHERE DYNAMICS
Variable_Level_1: MAGNETIC STORMS
ISO_Topic_Category: geoscientificInformation
Keyword: Geomagnetic observatories
Keyword: External magnetic field
Keyword: Magnetospheric currents
Spatial_Coverage
Southernmost_Latitude: 14.392
Northernmost_Latitude: 56.827
Westernmost_Longitude: -157.9996
Easternmost_Longitude: 140.186
Spatial_Coverage
Southernmost_Latitude: -13.807
Northernmost_Latitude: -43.267
Westernmost_Longitude: -171.775
Easternmost_Longitude: 115.950
Data_Center
Data_Center_Name
Short_Name: Deutsches GeoForschungsZentrum GFZ
Long_Name: GFZ
Personnel
Role: DATA CENTER CONTACT
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).
Released
Dataset
Abstract
Files
