フォアアークの地震帯:メガスラスト地震の破裂を抑制する流体経路
Rintaroh Suzuki1, Naoki Uchida1,2, Weiqiang Zhu3
1Graduate School of Science, Tohoku University, Sendai, Japan.
まとめ
地面に移動する沈殿した液体は,日本の前方における地震に影響を与えます. 機械学習は 流体供給に繋がる地震帯を特定し メガスラストの破裂を制限し 浅い地震を予測しました
科学分野:
- 地球科学
- 地震学
- 地理学
背景:
- 海洋プレートから流体が放出され 地球の表面へと移動します
- これらの移動する流体は プレアーク地域における 構造的断層と地震活動に影響を与えます
研究 の 目的:
- 地震データを用いて東北の地震を検知し 位置づけること.
- 流体移動と前弓における地震性の関係を調査する.
- メガスラストの破裂と地震の予測に対するフォアアークの地震性の意味を理解する.
主な方法:
- 機械学習アルゴリズムを使って 地震を検知し 地元化しました
- 日本北東部の海底地震ネットワークの データを分析した
- 沈殿板から海底までの地震力の垂直分布を調べた.
主要な成果:
- 海底の近くまで広がる"前弓地震帯"と呼ばれる 独特の地震パターンを特定した.
- 地震帯と下層プレートからの流体供給を 関連付けました
- 高い地震性ゾーンは内陸に広がり,既知の遅い滑りイベントと歴史的な地震の境界線と一致しています.
結論:
- フォアアークの地震性は,シブダクティングプレートからの流体移動の影響を受けます.
- フォアアークの地震帯は,メガスラストの破裂地帯を制限する役割を果たす可能性があります.
- 発見は,東京都を含む地域の浅い,破壊的な地震の可能性を裏付けています.
関連する概念動画
Fault Types
130
When analyzing a single line-to-ground fault from phase A to ground at a three-phase bus, it is important to consider the fault impedance. This impedance is zero for a bolted fault, equal to the arc impedance for an arcing fault, and represents the total fault impedance for a transmission-line insulator flashover. To derive sequence and phase currents, fault conditions are translated from the phase domain to the sequence domain.
For line-to-line faults occurring between phases B and C, the...
For line-to-line faults occurring between phases B and C, the...
130
Directional Relays
203
Directional relays, essential for managing unidirectional fault currents, enhance the safety and efficiency of power systems. On power lines equipped with directional relays, faults downstream (to the right) of the current transformer typically cause the fault current to lag the bus voltage by approximately 90 degrees, known as the forward direction. In contrast, upstream (left-side) faults may result in the fault current leading the bus voltage by nearly 90 degrees, termed the reverse...
203
Design Example: Analyzing Capacity Contours for Flood Risk Assessment
105
Flood risk assessment involves careful planning and analysis to ensure the safety of communities near water retention structures. Capacity contours are a vital tool in this process, as they illustrate the potential spread of water at specific levels in a given area. In the context of building a bund across a small valley, these contours play a critical role in evaluating the safety of nearby residential areas.In this example, the bund is intended to store stormwater in the valley. The engineers...
105
Frictional Forces on Flat Belts
1.0K
Flat belts are commonly used in various industrial applications for transmitting power from one pulley to another. When a flat belt is wrapped around a set of pulleys, it experiences different tensions at the driving pulley ends due to the friction between the belt and pulley surface. When the pulley moves in a counterclockwise direction, the tension T2 on the opposite side of the pulley where the belt is moving away from is higher than the tension T1 on the side where the belt is moving...
1.0K
Mechanism of Lamellipodia Formation
2.8K
Cells migrating in response to external stimuli form lamellipodia, which are thin membrane protrusions supported by a mesh of linked, branched, or unbranched actin filaments. These actin filaments interact with myosin motor proteins, creating the dynamic actomyosin complex within the cytoskeleton. Contractility, or the ability to generate contractile stress, is inherent to the actomyosin complex. It helps cells detect the stiffness of the surrounding ECM and exert contractile force for...
2.8K
Stress-Strain Diagram - Brittle Materials
2.8K
Brittle materials, including glass, cast iron, and stone, exhibit unique characteristics. They fracture without considerable change in their elongation rate, indicating that their breaking and ultimate strength are equivalent. Such materials also show lower strain levels at the point of rupture. The failure in brittle materials predominantly results from normal stresses, as evidenced by the rupture created along a surface perpendicular to the applied load. These materials do not display...
2.8K


