Clustering of Long-Period Earthquakes Beneath Gorely Volcano (Kamchatka) during a Degassing Episode in 2013
Gorely is one of the most active volcanoes in Kamchatka with a rich magmatic and eruptive history reflected in its composite structure. In 2013–2014, a temporary network of 20 seismic stations was installed on Gorely for one year. During the four months of its high degassing rate, seismic activity w...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2020-06-01
|
| Series: | Geosciences |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2076-3263/10/6/230 |
| _version_ | 1797565339048869888 |
|---|---|
| author | Sergei Abramenkov Nikolaï M. Shapiro Ivan Koulakov Ilyas Abkadyrov |
| author_facet | Sergei Abramenkov Nikolaï M. Shapiro Ivan Koulakov Ilyas Abkadyrov |
| author_sort | Sergei Abramenkov |
| collection | DOAJ |
| description | Gorely is one of the most active volcanoes in Kamchatka with a rich magmatic and eruptive history reflected in its composite structure. In 2013–2014, a temporary network of 20 seismic stations was installed on Gorely for one year. During the four months of its high degassing rate, seismic activity was mostly expressed in the form of a long-period (LP) seismic tremor. In this study, we have developed a workflow based on the combination of back-projection (BP), cluster analysis, and matched-filter (MF) methods. By applying it to continuous seismic records for the study period, we were able to identify discrete LP events within the tremor sequence automatically and individually investigate their properties. A catalog obtained using the BP detection algorithm consist of 1741 high-energy events. Cluster analysis revealed that the entire variety of LP earthquakes in this catalog could be grouped into five families, which are sequentially organized in time. Utilizing templates of these families in the MF search resulted in the complementary catalog of 80,615 low-energy events. The long-term occurrence of highly repetitive LP events in the same location may correspond to resonating conduits behaving in response to the high-pressure gases flowing from the decompressed magma chamber up to the volcano’s crater. |
| first_indexed | 2024-03-10T19:10:44Z |
| format | Article |
| id | doaj.art-04dd0ce920494d808e7618af665054c7 |
| institution | Directory Open Access Journal |
| issn | 2076-3263 |
| language | English |
| last_indexed | 2024-03-10T19:10:44Z |
| publishDate | 2020-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Geosciences |
| spelling | doaj.art-04dd0ce920494d808e7618af665054c72023-11-20T03:45:54ZengMDPI AGGeosciences2076-32632020-06-0110623010.3390/geosciences10060230Clustering of Long-Period Earthquakes Beneath Gorely Volcano (Kamchatka) during a Degassing Episode in 2013Sergei Abramenkov0Nikolaï M. Shapiro1Ivan Koulakov2Ilyas Abkadyrov3Institut de Physique du Globe de Paris, Université de Paris, CNRS UMR7154, 1 rue Jussieu, 75238 Paris, FranceInstitut des Sciences de la Terre (ISTERRE), UMR CNRS 5375, Université Grenoble-Alpes, 38058 Grenoble, FranceTrofimuk Institute of Petroleum Geology and Geophysics SB RAS, Prospekt Koptyuga, 3, 630090 Novosibirsk, RussiaTrofimuk Institute of Petroleum Geology and Geophysics SB RAS, Prospekt Koptyuga, 3, 630090 Novosibirsk, RussiaGorely is one of the most active volcanoes in Kamchatka with a rich magmatic and eruptive history reflected in its composite structure. In 2013–2014, a temporary network of 20 seismic stations was installed on Gorely for one year. During the four months of its high degassing rate, seismic activity was mostly expressed in the form of a long-period (LP) seismic tremor. In this study, we have developed a workflow based on the combination of back-projection (BP), cluster analysis, and matched-filter (MF) methods. By applying it to continuous seismic records for the study period, we were able to identify discrete LP events within the tremor sequence automatically and individually investigate their properties. A catalog obtained using the BP detection algorithm consist of 1741 high-energy events. Cluster analysis revealed that the entire variety of LP earthquakes in this catalog could be grouped into five families, which are sequentially organized in time. Utilizing templates of these families in the MF search resulted in the complementary catalog of 80,615 low-energy events. The long-term occurrence of highly repetitive LP events in the same location may correspond to resonating conduits behaving in response to the high-pressure gases flowing from the decompressed magma chamber up to the volcano’s crater.https://www.mdpi.com/2076-3263/10/6/230Gorely volcanodegassinglong-period seismicitycluster analysisback-projectionmatched-filter |
| spellingShingle | Sergei Abramenkov Nikolaï M. Shapiro Ivan Koulakov Ilyas Abkadyrov Clustering of Long-Period Earthquakes Beneath Gorely Volcano (Kamchatka) during a Degassing Episode in 2013 Geosciences Gorely volcano degassing long-period seismicity cluster analysis back-projection matched-filter |
| title | Clustering of Long-Period Earthquakes Beneath Gorely Volcano (Kamchatka) during a Degassing Episode in 2013 |
| title_full | Clustering of Long-Period Earthquakes Beneath Gorely Volcano (Kamchatka) during a Degassing Episode in 2013 |
| title_fullStr | Clustering of Long-Period Earthquakes Beneath Gorely Volcano (Kamchatka) during a Degassing Episode in 2013 |
| title_full_unstemmed | Clustering of Long-Period Earthquakes Beneath Gorely Volcano (Kamchatka) during a Degassing Episode in 2013 |
| title_short | Clustering of Long-Period Earthquakes Beneath Gorely Volcano (Kamchatka) during a Degassing Episode in 2013 |
| title_sort | clustering of long period earthquakes beneath gorely volcano kamchatka during a degassing episode in 2013 |
| topic | Gorely volcano degassing long-period seismicity cluster analysis back-projection matched-filter |
| url | https://www.mdpi.com/2076-3263/10/6/230 |
| work_keys_str_mv | AT sergeiabramenkov clusteringoflongperiodearthquakesbeneathgorelyvolcanokamchatkaduringadegassingepisodein2013 AT nikolaimshapiro clusteringoflongperiodearthquakesbeneathgorelyvolcanokamchatkaduringadegassingepisodein2013 AT ivankoulakov clusteringoflongperiodearthquakesbeneathgorelyvolcanokamchatkaduringadegassingepisodein2013 AT ilyasabkadyrov clusteringoflongperiodearthquakesbeneathgorelyvolcanokamchatkaduringadegassingepisodein2013 |