2026-05-30T16:28:59Zhttp://doidb.wdc-terra.org/oaip/oai
oai:doidb.wdc-terra.org:73392024-06-20T14:30:19ZDOIDBDOIDB.GFZ
false4DOIDB.GFZ 10.5880/Hpo.0002 Matzka, Jürgen Jürgen Matzka 0000-0001-9926-2796 GFZ German Research Centre for Geosciences, Potsdam, Germany Bronkalla, Oliver Oliver Bronkalla GFZ German Research Centre for Geosciences, Potsdam, Germany Kervalishvili, Guram Guram Kervalishvili 0000-0001-8885-4198 GFZ German Research Centre for Geosciences, Potsdam, Germany Rauberg, Jan Jan Rauberg GFZ German Research Centre for Geosciences, Potsdam, Germany Yamazaki, Yosuke Yosuke Yamazaki 0000-0002-7624-4752 GFZ German Research Centre for Geosciences, Potsdam, Germany Geomagnetic Hpo index GFZ Data Services 2022 Hpo Hpo index Hp30 ap30 Hp60 ap60 Kp Kp index ap index geomagnetism space weather space physics EARTH SCIENCE > SOLID EARTH > GEOMAGNETISM EARTH SCIENCE > SOLID EARTH > GEOMAGNETISM > GEOMAGNETIC INDICES > KP INDEX EARTH SCIENCE > SUN-EARTH INTERACTIONS EARTH SCIENCE > SUN-EARTH INTERACTIONS > IONOSPHERE/MAGNETOSPHERE DYNAMICS > AURORAE EARTH SCIENCE > SUN-EARTH INTERACTIONS > IONOSPHERE/MAGNETOSPHERE DYNAMICS > GEOMAGNETIC INDICES EARTH SCIENCE > SUN-EARTH INTERACTIONS > IONOSPHERE/MAGNETOSPHERE DYNAMICS > MAGNETIC FIELDS/MAGNETIC CURRENTS EARTH SCIENCE > SUN-EARTH INTERACTIONS > IONOSPHERE/MAGNETOSPHERE DYNAMICS > MAGNETIC STORMS EARTH SCIENCE > SUN-EARTH INTERACTIONS > IONOSPHERE/MAGNETOSPHERE DYNAMICS > SOLAR WIND Matzka, Jürgen Jürgen Matzka 0000-0001-9926-2796 GFZ German Research Centre for Geosciences, Potsdam, Germany Matzka, Jürgen Jürgen Matzka 0000-0001-9926-2796 GFZ German Research Centre for Geosciences, Potsdam, Germany Bronkalla, Oliver Oliver Bronkalla GFZ German Research Centre for Geosciences, Potsdam, Germany Bronkalla, Oliver Oliver Bronkalla GFZ German Research Centre for Geosciences, Potsdam, Germany Bronkalla, Oliver Oliver Bronkalla GFZ German Research Centre for Geosciences, Potsdam, Germany Kervalishvili, Guram Guram Kervalishvili 0000-0001-8885-4198 GFZ German Research Centre for Geosciences, Potsdam, Germany Rauberg, Jan Jan Rauberg GFZ German Research Centre for Geosciences, Potsdam, Germany Yamazaki, Yosuke Yosuke Yamazaki 0000-0002-7624-4752 GFZ German Research Centre for Geosciences, Potsdam, Germany Baillie, Orsi Orsi Baillie British Geological Survey, Edinburgh, UK Blais, Charles Charles Blais Natural Resources Canada, Ottawa, Canada Calp, David David Calp 0000-0003-3784-0372 Natural Resources Canada, Ottawa, Canada Clarke, Ellen Ellen Clarke British Geological Survey, Edinburgh, UK Claycomb, Abram Abram Claycomb 0000-0002-2908-2586 U.S. Geological Survey, Boulder, US Haseloff, Jürgen Jürgen Haseloff GFZ German Research Centre for Geosciences (Germany) Lewis, Andrew Andrew Lewis 0000-0001-9517-8781 Geoscience Australia, Canberra, Australia Morris, Jake Jake Morris U.S. Geological Survey, Boulder, US Morschhauser, Achim Achim Morschhauser 0000-0001-7955-4441 GFZ German Research Centre for Geosciences (Germany) Petersen, Tanja Tanja Petersen The Institute of Geological & Nuclear Sciences Ltd, Lower Hutt, New Zealand Reay, Sarah Sarah Reay 0000-0002-0748-5229 British Geological Survey, Edinburgh, UK Schwarz, Gerhard Gerhard Schwarz Geological Survey of Sweden (Sweden) Tornow, Katrin Katrin Tornow GFZ German Research Centre for Geosciences, Potsdam, Germany Willer, Anna Naemi Anna Naemi Willer 0000-0002-1762-7630 Technical University of Denmark, Kgs. Lyngby, Denmark Worthington, Bill Bill Worthington 0000-0002-5879-0477 U.S. Geological Survey, Boulder, US Geomagnetic Observatory Canberra (CNB) maintained by: Geoscience Australia (Australia) Geoscience Australia, Canberra, Australia Geomagnetic Observatory Brorfelde (BFE) maintained by: Technical University of Denmark (Denmark) Technical University of Denmark, Lyngby, Denmark Geomagnetic Observatory Eskdalemuir (ESK) maintained by: British Geological Survey (UK) British Geological Survey, Edinburg, UK Geomagnetic Observatory Eyrewell (EYR) maintained by: GNS Science (New Zealand) The Institute of Geological & Nuclear Sciences Ltd, Lower Hutt, New Zealand Geomagnetic Observatory Fredericksburg (FRD) maintained by: U.S. Geological Survey (US) U.S. Geological Survey, US Geomagnetic Observatory Hartland (HAD) maintained by: British Geological Survey (UK) British Geological Survey, UK Geomagnetic Observatory Lerwick (LER) maintained by: British Geological Survey (UK) British Geological Survey, UK Geomagnetic Observatory Meanook (MEA) maintained by: Natural Resources Canada (Canada) Natural Resources Canada, Canada Geomagnetic Observatory Niemegk (NGK) maintained by: GFZ German Research Centre for Geosciences (Germany) GFZ German Research Centre for Geosciences, Potsdam, Germany Geomagnetic Observatory Ottawa (OTT) maintained by: Natural Resources Canada (Canada) Natural Resources Canada, Canada Geomagnetic Observatory Sitka (SIT) maintained by: U.S. Geological Survey (US) U.S. Geological Survey, US Geomagnetic Observatory Uppsala (UPS) maintained by: Geological Survey of Sweden (Sweden) Geological Survey of Sweden, Sweden Geomagnetic Observatory Wingst (WNG) maintained by: GFZ German Research Centre for Geosciences (Germany) GFZ German Research Centre for Geosciences, Potsdam, Germany Matzka, Jürgen GFZ German Research Centre for Geosciences, Potsdam, Germany Bronkalla, Oliver GFZ German Research Centre for Geosciences, Potsdam, Germany 1932-01-01 Dataset 10.5880/Kp.0001 10.1029/2020SW002641 DOI of HPO description Paper (Yamazaki et al, in review) 10.5880/Hpo.0001 2.0 CC BY 4.0 This data publication includes the half-hourly Hp30 and ap30 indices as well as the hourly Hp60 and ap60 indices, collectively denoted as Hpo. This dataset is based on near real-time geomagnetic observatory data provided by 13 contributing observatories. It is derived and distributed by GFZ German Research Centre for Geosciences. When using the Hpo index, please cite this data publication as well as the accompanying publication Yamazaki et al. (submitted), which serves as documentation of the Hpo.

The dataset is organised in yearly files, which, for the current year, are updated on a monthly basis. Typically, during the second week of a month, the data for the previous month is appended to the current year's file. The files are in ASCII files and start with header lines marked with # (hash).

The Hpo index was developed within the H2020 project SWAMI (grant agreement No 776287) and is produced by Geomagnetic Observatory Niemegk, GFZ German Research Centre for Geosciences. It derives from the same 13 geomagnetic observatories that also contribute to the Kp index (Matzka et al., 2021, https://doi.org/10.5880/Kp.0001). They are listed as contributors to this data publication.

With the introduction of the DOI for the Hpo index (Matzka et al, 2021, https://doi.org/10.5880/Hpo.0001), this DOI landing page and the associated HTTPS server linked to the DOI become the primary archive of Hpo (while the other established index distribution mechanisms at GFZ will be maintained in parallel). With the DOI, the dataset can grow with time, but a change of the data, once published, is not possible. If necessity arises in the future to correct already published values, then the corrected dataset will be published with a new DOI. Older DOIs and data sets will then still be available. For each DOI, an additional versioning mechanism will be available to document changes to the files such as header or format changes, which do not affect the integrity of the data. The DOI https://doi.org/10.5880/Hpo.0002 identifies the current version. A format description and a version history are provided in the data download folder.
Version history:

2022-03-26
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Publication of Version Hpo.0002. This version replaces version Hpo.0001.

The Hpo, like the Kp nowcast, is based on the FMI algorithm (see Matzka et al., 2021, https://doi.org/10.1029/2020SW002641) and goes through a rescaling procedure to be more similar to the definitive Kp values. The data in version Hpo.0001 from 2018 onwards suffered from a slight error in this rescaling algorithm, causing for example somewhat too few Hpo 0 values and somewhat too many Hpo 0.333 values. This error was corrected for version Hpo.0002. The values from 1995 to 2017 are identical for both versions.

2021-04-26
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Publication of Version Hpo.0001

Global coverage of the Hp30, ap30, Hp60, and ap60 indices index -180 180 -90 90 H2020 European Research Council http://doi.org/10.13039/100010663 776287 Space Weather Atmosphere Models and Indices (SWAMI)