Seismic Phase Association Based on the Maximum Likelihood Method
Phase association is a process that links seismic phases triggered at the stations of a seismic network to declare the occurrence of earthquakes. During phase association, a set of phases from different stations is examined to determine the common origin of phases within a specific region, predomina...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2021-08-01
|
| Series: | Frontiers in Earth Science |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2021.699281/full |
| _version_ | 1818887226450247680 |
|---|---|
| author | Dong-Hoon Sheen Paul A. Friberg |
| author_facet | Dong-Hoon Sheen Paul A. Friberg |
| author_sort | Dong-Hoon Sheen |
| collection | DOAJ |
| description | Phase association is a process that links seismic phases triggered at the stations of a seismic network to declare the occurrence of earthquakes. During phase association, a set of phases from different stations is examined to determine the common origin of phases within a specific region, predominantly on the basis of a grid search and the sum of observations. The association of seismic phases in local earthquake monitoring systems or earthquake early warning systems is often disturbed not only by transient noises, but also by large regional or teleseismic events. To mitigate this disturbance, we developed a seismic phase association method, binder_max, which uses the maximum likelihood method to associate seismic phases. The method is based on the framework of binder_ew, the phase associator of Earthworm, but it uses a likelihood distribution of the arrival information instead of stacking arrival information. Applying binder_max to data from seismic networks of South Korea and Ohio, United States, we found a significant improvement in the robustness of the method against large regional or teleseismic events compared to binder_ew. Our results indicate that binder_max can associate seismic phases of local earthquakes to the same degree as binder_ew as well as can avoid many of the false associations that have limited binder_ew. |
| first_indexed | 2024-12-19T16:33:52Z |
| format | Article |
| id | doaj.art-55515e56b8df4f2197760d3c47cf8db2 |
| institution | Directory Open Access Journal |
| issn | 2296-6463 |
| language | English |
| last_indexed | 2024-12-19T16:33:52Z |
| publishDate | 2021-08-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Earth Science |
| spelling | doaj.art-55515e56b8df4f2197760d3c47cf8db22022-12-21T20:14:03ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632021-08-01910.3389/feart.2021.699281699281Seismic Phase Association Based on the Maximum Likelihood MethodDong-Hoon Sheen0Paul A. Friberg1Department of Geological Environment, Faculty of Earth Systems and Environmental Sciences, Chonnam National University, Gwangju, South KoreaInstrumental Software Technologies, Inc., Saratoga Springs, NY, United StatesPhase association is a process that links seismic phases triggered at the stations of a seismic network to declare the occurrence of earthquakes. During phase association, a set of phases from different stations is examined to determine the common origin of phases within a specific region, predominantly on the basis of a grid search and the sum of observations. The association of seismic phases in local earthquake monitoring systems or earthquake early warning systems is often disturbed not only by transient noises, but also by large regional or teleseismic events. To mitigate this disturbance, we developed a seismic phase association method, binder_max, which uses the maximum likelihood method to associate seismic phases. The method is based on the framework of binder_ew, the phase associator of Earthworm, but it uses a likelihood distribution of the arrival information instead of stacking arrival information. Applying binder_max to data from seismic networks of South Korea and Ohio, United States, we found a significant improvement in the robustness of the method against large regional or teleseismic events compared to binder_ew. Our results indicate that binder_max can associate seismic phases of local earthquakes to the same degree as binder_ew as well as can avoid many of the false associations that have limited binder_ew.https://www.frontiersin.org/articles/10.3389/feart.2021.699281/fullseismic phase associationmaximum likelihood methodearthwormearthquake monitoring systemearthquake early warning systemlocal earthquake |
| spellingShingle | Dong-Hoon Sheen Paul A. Friberg Seismic Phase Association Based on the Maximum Likelihood Method Frontiers in Earth Science seismic phase association maximum likelihood method earthworm earthquake monitoring system earthquake early warning system local earthquake |
| title | Seismic Phase Association Based on the Maximum Likelihood Method |
| title_full | Seismic Phase Association Based on the Maximum Likelihood Method |
| title_fullStr | Seismic Phase Association Based on the Maximum Likelihood Method |
| title_full_unstemmed | Seismic Phase Association Based on the Maximum Likelihood Method |
| title_short | Seismic Phase Association Based on the Maximum Likelihood Method |
| title_sort | seismic phase association based on the maximum likelihood method |
| topic | seismic phase association maximum likelihood method earthworm earthquake monitoring system earthquake early warning system local earthquake |
| url | https://www.frontiersin.org/articles/10.3389/feart.2021.699281/full |
| work_keys_str_mv | AT donghoonsheen seismicphaseassociationbasedonthemaximumlikelihoodmethod AT paulafriberg seismicphaseassociationbasedonthemaximumlikelihoodmethod |