Mainshock‐Aftershock Clustering in Volcanic Regions
Abstract Earthquakes break their general Poissonean behavior through two types of seismic bursts: swarms and mainshock‐aftershock sequences. The former is commonly thought to dominate in volcanic and geothermal regions, but aftershock production, including within swarms, is not well studied in volca...
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| Format: | Article |
| Language: | English |
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Wiley
2018-02-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1002/2017GL075738 |
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| author | Ricardo Garza‐Giron Emily E. Brodsky Stephanie G. Prejean |
| author_facet | Ricardo Garza‐Giron Emily E. Brodsky Stephanie G. Prejean |
| author_sort | Ricardo Garza‐Giron |
| collection | DOAJ |
| description | Abstract Earthquakes break their general Poissonean behavior through two types of seismic bursts: swarms and mainshock‐aftershock sequences. The former is commonly thought to dominate in volcanic and geothermal regions, but aftershock production, including within swarms, is not well studied in volcanic regions. Here we compare mainshock‐aftershock clustering in active volcanic regions in Japan to nearby nonvolcanic regions. We find that aftershock production is similar in both areas by two separate metrics: (1) Both volcanic and nonvolcanic regions have similar proportions of areas that cluster into mainshock‐aftershock sequences. (2) Volcanic areas with mainshock‐aftershock sequences have aftershock productivity at least as high as nonvolcanic regions. We also find that volcano‐tectonic events that are precursors to an eruption are more common at volcanoes without mainshock‐aftershock clusters than at volcanoes with well‐defined mainshock‐aftershock clusters. This last finding hints at a strategy to identify volcanic systems where cataloged earthquakes are good predictors of behavior. |
| format | Article |
| id | doaj-art-7bfaa8b5c162471e8cd968a4aefe0937 |
| institution | OA Journals |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2018-02-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-7bfaa8b5c162471e8cd968a4aefe09372025-08-20T01:51:44ZengWileyGeophysical Research Letters0094-82761944-80072018-02-014531370137810.1002/2017GL075738Mainshock‐Aftershock Clustering in Volcanic RegionsRicardo Garza‐Giron0Emily E. Brodsky1Stephanie G. Prejean2Department of Earth and Planetary Sciences University of California Santa Cruz CA USADepartment of Earth and Planetary Sciences University of California Santa Cruz CA USAVolcano Science Center United States Geological Survey Anchorage AK USAAbstract Earthquakes break their general Poissonean behavior through two types of seismic bursts: swarms and mainshock‐aftershock sequences. The former is commonly thought to dominate in volcanic and geothermal regions, but aftershock production, including within swarms, is not well studied in volcanic regions. Here we compare mainshock‐aftershock clustering in active volcanic regions in Japan to nearby nonvolcanic regions. We find that aftershock production is similar in both areas by two separate metrics: (1) Both volcanic and nonvolcanic regions have similar proportions of areas that cluster into mainshock‐aftershock sequences. (2) Volcanic areas with mainshock‐aftershock sequences have aftershock productivity at least as high as nonvolcanic regions. We also find that volcano‐tectonic events that are precursors to an eruption are more common at volcanoes without mainshock‐aftershock clusters than at volcanoes with well‐defined mainshock‐aftershock clusters. This last finding hints at a strategy to identify volcanic systems where cataloged earthquakes are good predictors of behavior.https://doi.org/10.1002/2017GL075738aftershocksvolcano seismicityearthquakes |
| spellingShingle | Ricardo Garza‐Giron Emily E. Brodsky Stephanie G. Prejean Mainshock‐Aftershock Clustering in Volcanic Regions Geophysical Research Letters aftershocks volcano seismicity earthquakes |
| title | Mainshock‐Aftershock Clustering in Volcanic Regions |
| title_full | Mainshock‐Aftershock Clustering in Volcanic Regions |
| title_fullStr | Mainshock‐Aftershock Clustering in Volcanic Regions |
| title_full_unstemmed | Mainshock‐Aftershock Clustering in Volcanic Regions |
| title_short | Mainshock‐Aftershock Clustering in Volcanic Regions |
| title_sort | mainshock aftershock clustering in volcanic regions |
| topic | aftershocks volcano seismicity earthquakes |
| url | https://doi.org/10.1002/2017GL075738 |
| work_keys_str_mv | AT ricardogarzagiron mainshockaftershockclusteringinvolcanicregions AT emilyebrodsky mainshockaftershockclusteringinvolcanicregions AT stephaniegprejean mainshockaftershockclusteringinvolcanicregions |