Characterizing the Foreshock, Main Shock, and Aftershock Sequences of the Recent Major Earthquakes in Southern Alaska, 2016–2018
For each of three major M ≥ 7.0 earthquakes (i.e., the January 24, 2016, M7.1 earthquake 86 km E of Old Iliamna; the January 23, 2018, M7.9 earthquake 280 km SE of Kodiak; and the November 30, 2018, M7.1 earthquake 14 km NNW of Anchorage, Alaska), the study considers characterization of the foreshoc...
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Online Access: | http://dx.doi.org/10.3389/feart.2020.584659 https://www.frontiersin.org/articles/10.3389/feart.2020.584659/full |
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crfrontiers:10.3389/feart.2020.584659 2024-09-30T14:38:08+00:00 Characterizing the Foreshock, Main Shock, and Aftershock Sequences of the Recent Major Earthquakes in Southern Alaska, 2016–2018 Bukchin, B. G. Fomochkina, A. S. Kossobokov, V. G. Nekrasova, A. K. 2020 http://dx.doi.org/10.3389/feart.2020.584659 https://www.frontiersin.org/articles/10.3389/feart.2020.584659/full unknown Frontiers Media SA https://creativecommons.org/licenses/by/4.0/ Frontiers in Earth Science volume 8 ISSN 2296-6463 journal-article 2020 crfrontiers https://doi.org/10.3389/feart.2020.584659 2024-09-17T04:12:03Z For each of three major M ≥ 7.0 earthquakes (i.e., the January 24, 2016, M7.1 earthquake 86 km E of Old Iliamna; the January 23, 2018, M7.9 earthquake 280 km SE of Kodiak; and the November 30, 2018, M7.1 earthquake 14 km NNW of Anchorage, Alaska), the study considers characterization of the foreshock and aftershock sequences in terms of their variations and scaling properties, including the behavior of the control parameter η of the unified scaling law for earthquakes (USLE), along with a detailed analysis of the surface wave records for reconstruction of the source in the approximation of the second moments of the stress glut tensor to obtain integral estimation of its length, orientation, and development over time. The three major earthquakes at 600 km around Anchorage are, in fact, very different due to apparent complexity of earthquake flow dynamics in the orogenic corner of the Pacific and North America plate boundary. The USLE generalizes the classic Gutenberg-Richter relationship taking into account the self-similar scaling of the empirical distribution of earthquake epicenters. The study confirms the existence of the long-term periods of regional stability of the USLE control parameter that are interrupted by mid- or even short-term bursts of activity associated with major catastrophic events. Article in Journal/Newspaper Kodiak Alaska Frontiers (Publisher) Anchorage Pacific Frontiers in Earth Science 8 |
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For each of three major M ≥ 7.0 earthquakes (i.e., the January 24, 2016, M7.1 earthquake 86 km E of Old Iliamna; the January 23, 2018, M7.9 earthquake 280 km SE of Kodiak; and the November 30, 2018, M7.1 earthquake 14 km NNW of Anchorage, Alaska), the study considers characterization of the foreshock and aftershock sequences in terms of their variations and scaling properties, including the behavior of the control parameter η of the unified scaling law for earthquakes (USLE), along with a detailed analysis of the surface wave records for reconstruction of the source in the approximation of the second moments of the stress glut tensor to obtain integral estimation of its length, orientation, and development over time. The three major earthquakes at 600 km around Anchorage are, in fact, very different due to apparent complexity of earthquake flow dynamics in the orogenic corner of the Pacific and North America plate boundary. The USLE generalizes the classic Gutenberg-Richter relationship taking into account the self-similar scaling of the empirical distribution of earthquake epicenters. The study confirms the existence of the long-term periods of regional stability of the USLE control parameter that are interrupted by mid- or even short-term bursts of activity associated with major catastrophic events. |
format |
Article in Journal/Newspaper |
author |
Bukchin, B. G. Fomochkina, A. S. Kossobokov, V. G. Nekrasova, A. K. |
spellingShingle |
Bukchin, B. G. Fomochkina, A. S. Kossobokov, V. G. Nekrasova, A. K. Characterizing the Foreshock, Main Shock, and Aftershock Sequences of the Recent Major Earthquakes in Southern Alaska, 2016–2018 |
author_facet |
Bukchin, B. G. Fomochkina, A. S. Kossobokov, V. G. Nekrasova, A. K. |
author_sort |
Bukchin, B. G. |
title |
Characterizing the Foreshock, Main Shock, and Aftershock Sequences of the Recent Major Earthquakes in Southern Alaska, 2016–2018 |
title_short |
Characterizing the Foreshock, Main Shock, and Aftershock Sequences of the Recent Major Earthquakes in Southern Alaska, 2016–2018 |
title_full |
Characterizing the Foreshock, Main Shock, and Aftershock Sequences of the Recent Major Earthquakes in Southern Alaska, 2016–2018 |
title_fullStr |
Characterizing the Foreshock, Main Shock, and Aftershock Sequences of the Recent Major Earthquakes in Southern Alaska, 2016–2018 |
title_full_unstemmed |
Characterizing the Foreshock, Main Shock, and Aftershock Sequences of the Recent Major Earthquakes in Southern Alaska, 2016–2018 |
title_sort |
characterizing the foreshock, main shock, and aftershock sequences of the recent major earthquakes in southern alaska, 2016–2018 |
publisher |
Frontiers Media SA |
publishDate |
2020 |
url |
http://dx.doi.org/10.3389/feart.2020.584659 https://www.frontiersin.org/articles/10.3389/feart.2020.584659/full |
geographic |
Anchorage Pacific |
geographic_facet |
Anchorage Pacific |
genre |
Kodiak Alaska |
genre_facet |
Kodiak Alaska |
op_source |
Frontiers in Earth Science volume 8 ISSN 2296-6463 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3389/feart.2020.584659 |
container_title |
Frontiers in Earth Science |
container_volume |
8 |
_version_ |
1811640848025124864 |