Seasonality and Tectonic Influences on Subduction Zones for Ultra-Deep Earthquakes

• 作者: Anibal Azevedo Marilia Hagen
• 来源期刊: 地震研究(英文)
• 学科: 医学
• 关键词: Ultra-Deep Earthquakes (UDQ) SUBDUCTION Zones TECTONICS
• 年，卷（期）: 2018,（4）
• 页码范围: 269-284
• 页数: 16页
• 分类号: R73

摘要

Our previous research has found that deep or very deep earthquakes can be influenced by different seasons of the year. It also indicates that other factors may impact the seasonality in addition to these external parameters. This would explain why the response from Northern Hemisphere and Southern Hemisphere for the seasons is different. In the current research, we will focus on very deep earthquakes over a very long period, 1950-2017, which have high magnitude of M ≥ 6 with depth ≥ 500 km and named ultra-deep earthquakes (UDQ). We will separate such events by coordinates of each subduction area located in the Pacific Ring of Fire to find which effects the seasons have on these specific areas. Former tomographic studies in such regions pointed out that each area mentioned had systematic differences in the slab configuration along arcs. Our conclusions showed that those discrepancies may influence the enhancement of earthquakes in some seasons or months.