The hourly and half-hourly, open-ended, Kp-like planetary geomagnetic Hpo index family
Abstract
We present the new geomagnetic Hpo indices that resembles the widely used three-hourly Kp index, as it is based on the same 13 geomagnetic observatories and has a frequency distribution similar to that of Kp. A notable difference is the increased temporal resolution of one hour for the Hp60 version and half an hour for the Hp30 version of the Hpo. Hpo is open-ended and divides the events with Kp = 9o into a number of index values 9o, 9+, 10-, 10o, etc. Like Kp, which for some purposes is mapped to the linear ap index, our Hpo is accompanied by the linear apo (ap60 and ap30 indices). To assess and validate the new index, we compared it to other geomagnetic indices and solar wind parameters and investigate the index behavior during geomagnetic storms and substorms. We also tested Hpo instead of Kp to determine hemispheric power, which is an important parameter for high latitude forcing to atmospheric models. The index was developed within the H2020 project Space Weather Atmosphere Models and Indices (SWAMI) project.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2020
- Bibcode:
- 2020AGUFMSM050..04M
- Keywords:
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- 4313 Extreme events;
- NATURAL HAZARDS