2023年的Mw 7.8-7.7卡拉曼马拉斯地震是松散地滑动可预测的地震
Ellis Vavra1, Yuri Fialko1, Fatih Bulut2
1Institute of Geophysics and Planetary Physics, Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA USA.
概括
东安纳托利亚断层 (EAF) 上的2023年卡拉曼马拉斯地震双重释放的滑落量比随着时间的推移积累的多或更多. 这表明,在这个断层系统上,大地震复发的滑动可预测模型.
科学领域:
- 地质物理学 地质物理学
- 地震学 地震学
- 构造学 构造学 构造学 构造学
背景情况:
- 了解多个地震周期的地震行为是具有挑战性的,因为与复发间隔相比,观测数据有限.
- 大多数大型仪器记录的地震都发生在历史记录不完整的断层上.
- 2023年卡拉曼马拉斯地震双重破坏了东安纳托利亚断层 (EAF) 的多个部分,该地区拥有超过两千年的历史地震数据.
研究的目的:
- 评估东安纳托利亚断层 (EAF) 系统上大地震的重复模式.
- 为了比较积累的滑动赤字与2023年卡拉曼马拉斯地震双重地震的共震滑动.
- 评估地震复发模型对EAF的适用性.
主要方法:
- 对跨越两千年的历史地震记录进行分析.
- 测量和分析地震间变形数据.
- 积累的滑坡赤字与公布的2023年事件的共同地震滑坡模型的比较.
主要成果:
- 2023年卡拉曼马拉斯地震双重地震的共地震滑动相当于或超过每个破裂断层的计算滑动缺陷.
- 这一发现表明,东安纳托利亚断层 (EAF) 系统释放的累积应变与滑动可预测模型预测的一致或大于预测.
- 这项研究提供了对EAF大地震的压力积累和释放过程的见解.
结论:
- 滑动可预测复发模型在东安纳托利亚断层 (EAF) 大地震期间作为应变释放的下限.
- 2023年卡拉曼马拉斯地震双重的行为与基于历史地震性和地震间变形的预测保持一致.
- 这项研究增强了我们对主要断层系统长期地震行为的理解.
相关概念视频
Dynamic Modulus of Elasticity of Concrete
250
The dynamic modulus of elasticity assesses how a concrete structure deforms under impact or dynamic loads. It is typically higher than the static modulus of elasticity, measured under slow, steady loading conditions.
The sonic test is a common method to determine the dynamic modulus. In this test, a concrete beam, sized either 6 x 6 x 30 inches or 4 x 4 x 20 inches, is clamped at its center. Vibrations are initiated at one end of the beam by an electromagnetic exciter unit powered by...
The sonic test is a common method to determine the dynamic modulus. In this test, a concrete beam, sized either 6 x 6 x 30 inches or 4 x 4 x 20 inches, is clamped at its center. Vibrations are initiated at one end of the beam by an electromagnetic exciter unit powered by...
250
Global Climate Change
24.1K
Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
24.1K
Microcracking in Concrete
99
Microcracking in concrete refers to the tiny cracks that can form within the material even before any external load is applied. These microcracks typically occur at the interface between the coarse aggregate and the hydrated cement paste, often as a result of differential volume changes prompted by variations in stress-strain behavior, as well as thermal and moisture movement. Initially, these microcracks remain stable and do not grow substantially until the concrete is stressed to about 30...
99
Random and Systematic Errors
10.8K
Scientists always try their best to record measurements with the utmost accuracy and precision. However, sometimes errors do occur. These errors can be random or systematic. Random errors are observed due to the inconsistency or fluctuation in the measurement process, or variations in the quantity itself that is being measured. Such errors fluctuate from being greater than or less than the true value in repeated measurements. Consider a scientist measuring the length of an earthworm using a...
10.8K
Creep in Concrete
140
Creep refers to the time-dependent increase in strain under a sustained load, excluding other time-dependent deformations associated with shrinkage, swelling, and thermal expansion in concrete. The primary mechanism behind creep involves the loss of physically adsorbed water from the calcium silicate hydrate within the hydrated cement paste. This process is further exacerbated by concrete's non-linear stress-strain relationship, microcrack development in the interfacial transition zone, and...
140
Elasticity in Concrete
80
Upon subjecting concrete to moderate or high uniaxial compressive or tensile stresses, the strain response is non-linear relative to the stress applied. As the stress is removed, the resulting stress-strain curve deviates from the original path traced during loading, creating a hysteresis loop, indicative of the concrete's non-linear and non-elastic properties. Typically, a material's modulus of elasticity, which is a measure of the material's stiffness, is inferred from the linear...
80


