2024-03-29T14:31:39Zhttp://doidb.wdc-terra.org/oaip/oaioai:doidb.wdc-terra.org:66222019-03-12T14:45:48ZDOIDBDOIDB.GFZ
doi:10.5880/GFZ.2.3.2018.006
eng
GFZ German Research Centre for Geosciences
http://www.gfz-potsdam.de/
information
pointOfContact
2019-01-21
urn:ogc:def:crs:EPSG:4326
HMC Index
2018-10-01
creation
doi:10.5880/GFZ.2.3.2018.006
Pick, Leonie
GFZ German Research Centre for Geosciences, Potsdam, Germany
author
Korte, Monika
GFZ German Research Centre for Geosciences, Potsdam, Germany
author
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).
Complete
Pick, Leonie
GFZ German Research Centre for Geosciences, Potsdam, Germany
Researcher
leonie.pick@gfz-potsdam.de
pointOfContact
Geomagnetic observatories
External magnetic field
Magnetospheric currents
EARTH SCIENCE > SOLID EARTH > GEOMAGNETISM > GEOMAGNETIC INDICES
EARTH SCIENCE > SUN-EARTH INTERACTIONS > IONOSPHERE/MAGNETOSPHERE DYNAMICS > MAGNETIC FIELDS/MAGNETIC CURRENTS
EARTH SCIENCE > SUN-EARTH INTERACTIONS > IONOSPHERE/MAGNETOSPHERE DYNAMICS > MAGNETIC STORMS
NASA/GCMD Earth Science Keywords
publication
CC BY 4.0
CC BY 4.0
DOI of JGR - Space Physics paper when available.
DOI
IsSupplementTo
https://www.ngdc.noaa.gov/IAGA/vdat/IAGA2002/iaga2002format.html
URL
References
http://www.wdc.bgs.ac.uk/catalog/master.html
URL
References
eng
Spatial and temporal coverage of geomagnetic observatory data from the northern hemisphere.
-157.9996
140.186
14.392
56.827
1900-01-01
2015-12-31T23:30:00
Spatial and temporal coverage of geomagnetic observatory data from the southern hemisphere.
-171.775
115.950
-13.807
-43.267
1915-01-01
2015-12-31T23:30:00
http://dx.doi.org/doi:10.5880/GFZ.2.3.2018.006
WWW:LINK-1.0-http--link
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