Preseismic ULF electromagnetic effect from observation at Kamchatka
Some results of ULF magnetic field observation at Karimshino site (Kamchatka, Russia) since June 2000 to September 2001 are presented here. Using case study we have found an effect of suppression of ULF intensity about 2–6 days before rather strong and nearby seismic shocks (magnitude M = 4.0 – 6.2)...
Published in: | Natural Hazards and Earth System Sciences |
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ftcopernicus:oai:publications.copernicus.org:nhess37036 2023-05-15T16:58:46+02:00 Preseismic ULF electromagnetic effect from observation at Kamchatka Molchanov, O. Schekotov, A. Fedorov, E. Belyaev, G. Gordeev, E. 2018-09-27 application/pdf https://doi.org/10.5194/nhess-3-203-2003 https://nhess.copernicus.org/articles/3/203/2003/ eng eng doi:10.5194/nhess-3-203-2003 https://nhess.copernicus.org/articles/3/203/2003/ eISSN: 1684-9981 Text 2018 ftcopernicus https://doi.org/10.5194/nhess-3-203-2003 2020-07-20T16:27:41Z Some results of ULF magnetic field observation at Karimshino site (Kamchatka, Russia) since June 2000 to September 2001 are presented here. Using case study we have found an effect of suppression of ULF intensity about 2–6 days before rather strong and nearby seismic shocks (magnitude M = 4.0 – 6.2). It is revealed for nighttime and horizontal component of ULF field ( G ) in the frequency range 0.01 – 0.1 Hz. Then we prove the reliability of the effect by computed correlation between G (or 1/ G ) and specially calculated seismic indexes K s for the whole period of observation. Basing on the simple criteria we conclude that reliability of seismo-associated ULF suppression effect is comparable with well-known effect of connection between ULF variation and K p index of global magnetic activity. It seems the reason of suppression is located at the atmosphere or ionosphere but not in the ground medium. Text Kamchatka Copernicus Publications: E-Journals Natural Hazards and Earth System Sciences 3 3/4 203 209 |
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Copernicus Publications: E-Journals |
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ftcopernicus |
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English |
description |
Some results of ULF magnetic field observation at Karimshino site (Kamchatka, Russia) since June 2000 to September 2001 are presented here. Using case study we have found an effect of suppression of ULF intensity about 2–6 days before rather strong and nearby seismic shocks (magnitude M = 4.0 – 6.2). It is revealed for nighttime and horizontal component of ULF field ( G ) in the frequency range 0.01 – 0.1 Hz. Then we prove the reliability of the effect by computed correlation between G (or 1/ G ) and specially calculated seismic indexes K s for the whole period of observation. Basing on the simple criteria we conclude that reliability of seismo-associated ULF suppression effect is comparable with well-known effect of connection between ULF variation and K p index of global magnetic activity. It seems the reason of suppression is located at the atmosphere or ionosphere but not in the ground medium. |
format |
Text |
author |
Molchanov, O. Schekotov, A. Fedorov, E. Belyaev, G. Gordeev, E. |
spellingShingle |
Molchanov, O. Schekotov, A. Fedorov, E. Belyaev, G. Gordeev, E. Preseismic ULF electromagnetic effect from observation at Kamchatka |
author_facet |
Molchanov, O. Schekotov, A. Fedorov, E. Belyaev, G. Gordeev, E. |
author_sort |
Molchanov, O. |
title |
Preseismic ULF electromagnetic effect from observation at Kamchatka |
title_short |
Preseismic ULF electromagnetic effect from observation at Kamchatka |
title_full |
Preseismic ULF electromagnetic effect from observation at Kamchatka |
title_fullStr |
Preseismic ULF electromagnetic effect from observation at Kamchatka |
title_full_unstemmed |
Preseismic ULF electromagnetic effect from observation at Kamchatka |
title_sort |
preseismic ulf electromagnetic effect from observation at kamchatka |
publishDate |
2018 |
url |
https://doi.org/10.5194/nhess-3-203-2003 https://nhess.copernicus.org/articles/3/203/2003/ |
genre |
Kamchatka |
genre_facet |
Kamchatka |
op_source |
eISSN: 1684-9981 |
op_relation |
doi:10.5194/nhess-3-203-2003 https://nhess.copernicus.org/articles/3/203/2003/ |
op_doi |
https://doi.org/10.5194/nhess-3-203-2003 |
container_title |
Natural Hazards and Earth System Sciences |
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3 |
container_issue |
3/4 |
container_start_page |
203 |
op_container_end_page |
209 |
_version_ |
1766050857407741952 |