Recurrent Patterns in Dst Time Series
This study reports one approach for the classification of magnetic storms into recurrent patterns. A storm event is defined as a local minimum of Dst index. The analysis of Dst index for the period of year 1957 through year 2000 has demonstrated that a large portion of the storm events can be classi...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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The Korean Space Science Society
2003-06-01
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| Series: | Journal of Astronomy and Space Sciences |
| Subjects: | |
| Online Access: | http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2003/v20n2/OJOOBS_2003_v20n2_101.pdf |
| _version_ | 1797330677723561984 |
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| author | Hee-Jeong Kim Dae-Young Lee Wongyu Choe |
| author_facet | Hee-Jeong Kim Dae-Young Lee Wongyu Choe |
| author_sort | Hee-Jeong Kim |
| collection | DOAJ |
| description | This study reports one approach for the classification of magnetic storms into recurrent patterns. A storm event is defined as a local minimum of Dst index. The analysis of Dst index for the period of year 1957 through year 2000 has demonstrated that a large portion of the storm events can be classified into a set of recurrent patterns. In our approach, the classification is performed by seeking a categorization that minimizes thermodynamic free energy which is defined as the sum of classification errors and entropy. The error is calculated as the squared sum of the value differences between events. The classification depends on the noise parameter T that represents the strength of the intrinsic error in the observation and classification process. The classification results would be applicable in space weather forecasting. |
| first_indexed | 2024-03-08T07:23:09Z |
| format | Article |
| id | doaj.art-4cb0751a43f04e488aaec5c8142f19b4 |
| institution | Directory Open Access Journal |
| issn | 2093-5587 2093-1409 |
| language | English |
| last_indexed | 2024-03-08T07:23:09Z |
| publishDate | 2003-06-01 |
| publisher | The Korean Space Science Society |
| record_format | Article |
| series | Journal of Astronomy and Space Sciences |
| spelling | doaj.art-4cb0751a43f04e488aaec5c8142f19b42024-02-02T22:40:01ZengThe Korean Space Science SocietyJournal of Astronomy and Space Sciences2093-55872093-14092003-06-0120210110810.5140/JASS.2003.20.2.101Recurrent Patterns in Dst Time SeriesHee-Jeong Kim0Dae-Young Lee1Wongyu Choe2Department of Astronomy and Space Science, College of Natural Sciences and Institute for Basic Science Research, Chungbuk National University, Chungju, KoreaDepartment of Astronomy and Space Science, College of Natural Sciences and Institute for Basic Science Research, Chungbuk National University, Chungju, KoreaAIT Inc., Seocho-dong 1564-11, Seoul, 137-874, KoreaThis study reports one approach for the classification of magnetic storms into recurrent patterns. A storm event is defined as a local minimum of Dst index. The analysis of Dst index for the period of year 1957 through year 2000 has demonstrated that a large portion of the storm events can be classified into a set of recurrent patterns. In our approach, the classification is performed by seeking a categorization that minimizes thermodynamic free energy which is defined as the sum of classification errors and entropy. The error is calculated as the squared sum of the value differences between events. The classification depends on the noise parameter T that represents the strength of the intrinsic error in the observation and classification process. The classification results would be applicable in space weather forecasting.http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2003/v20n2/OJOOBS_2003_v20n2_101.pdfDst indexrecurrent patternsstorm classification |
| spellingShingle | Hee-Jeong Kim Dae-Young Lee Wongyu Choe Recurrent Patterns in Dst Time Series Journal of Astronomy and Space Sciences Dst index recurrent patterns storm classification |
| title | Recurrent Patterns in Dst Time Series |
| title_full | Recurrent Patterns in Dst Time Series |
| title_fullStr | Recurrent Patterns in Dst Time Series |
| title_full_unstemmed | Recurrent Patterns in Dst Time Series |
| title_short | Recurrent Patterns in Dst Time Series |
| title_sort | recurrent patterns in dst time series |
| topic | Dst index recurrent patterns storm classification |
| url | http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2003/v20n2/OJOOBS_2003_v20n2_101.pdf |
| work_keys_str_mv | AT heejeongkim recurrentpatternsindsttimeseries AT daeyounglee recurrentpatternsindsttimeseries AT wongyuchoe recurrentpatternsindsttimeseries |