古登堡-里希特定律（G-R 定律）描述了地震频度与震级的什么关系？
What relationship between earthquake frequency and magnitude does the Gutenberg–Richter law describe?
G-R 定律指出，震级每增大 1 级，发生频率约降低为原来的 1/10，数学上表示为 log₁₀N = a − bM。其中 b 值通常接近 1，反映小地震远多于大地震的统计规律，是地震危险性评估的基础。
The Gutenberg–Richter law states that each unit increase in magnitude reduces occurrence frequency by roughly a factor of ten, expressed as log₁₀N = a − bM. The b-value is typically near 1, reflecting that small quakes vastly outnumber large ones—a basis for seismic hazard assessment.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 来源待核验 · Source pending review
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出处备注：著录仅给书名，无版次与年份；同一书名常对应多个版次，不臆测具体版本。
《自然·地球科学》(Nature Geoscience) 地震统计研究
Nature Geoscience, earthquake statistics
#古登堡-里希特定律 #地震频度 #b值
P 波与 S 波的物理性质有何不同？为何 S 波不能在液态外核中传播？
How do P and S waves differ physically, and why can't S waves travel through the liquid outer core?
P 波是压缩波，质点振动方向与传播方向一致，可在固、液、气体中传播；S 波是剪切波，质点垂直于传播方向振动，只能在有剪切刚度的固体中传播。地球液态外核无剪切刚度，因此 S 波无法通过，由此证实外核为液态。
P waves are compressional, with particle motion along the propagation direction, and travel through solids, liquids, and gases. S waves are shear waves, with motion perpendicular to propagation, and require shear rigidity found only in solids. The liquid outer core lacks such rigidity, so S waves cannot pass—evidence that the outer core is molten.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
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Press & Siever,《Understanding Earth》W. H. Freeman 多版
F. Press and R. Siever, Understanding Earth, W. H. Freeman, various editions
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL1282939W：Understanding earth（按标题
#地震波 #P波 #S波 #地核
什么是断层？走滑断层和逆冲断层有何区别？
What is a fault, and how do strike-slip and thrust faults differ?
断层是岩层发生相对错动的破裂面。走滑断层中两盘沿水平方向相对滑动，如圣安德烈亚斯断层；逆冲断层中上盘相对向上逆冲，常见于板块碰撞带，易产生强烈地震。
A fault is a fracture surface along which rock masses slip. In strike-slip faults the blocks move horizontally past each other, like the San Andreas Fault; in thrust faults the hanging wall moves up and over, common at collision zones and prone to strong quakes.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
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舒良树 主编,《普通地质学》第3版(曾获全国首届优秀教材一等奖)
Shu Liangshu ed., General Geology, 3rd ed. (winner of the 1st National Excellent Textbook Award)
独立核验依据 · Independent verification: 核验依据 2 ISBN 9787116123892（豆瓣书目条目: 普通地质学）
#断层 #走滑 #逆冲
地震预警系统与地震预报有何不同？
How does an earthquake early-warning system differ from earthquake prediction?
地震预报试图在震前给出时间、地点和强度，目前科学上尚不可靠。地震预警利用地震波中速度快的 P 波先于破坏性的 S 波到达的时差，在强震抵达前数秒至数十秒发出警报，以降低伤亡。
Prediction attempts to specify a quake's time, place, and size in advance—still unreliable scientifically. Early warning exploits the travel-time gap between the fast P wave and the damaging S wave to issue alerts seconds to tens of seconds before strong shaking arrives, reducing casualties.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
舒良树 主编,《普通地质学》第3版(曾获全国首届优秀教材一等奖)
Shu Liangshu ed., General Geology, 3rd ed. (winner of the 1st National Excellent Textbook Award)
独立核验依据 · Independent verification: 核验依据 2 ISBN 9787116123892（豆瓣书目条目: 普通地质学）
#地震预警 #P波 #减灾
为什么板块边界常沿大洋中脊分布？
Why do plate boundaries commonly follow mid-ocean ridges?
大洋中脊是板块张裂、地幔物质上涌并新生大洋地壳的地方，属于离散型边界。地幔熔融补给使两侧板块不断分离，中脊因此成为全球最长的火山山脉系统，也是海底扩张的中心。
Mid-ocean ridges are where plates diverge and upwelling mantle creates new oceanic crust—divergent boundaries. Continuous mantle melting feeds the separating plates, making ridges the planet's longest volcanic mountain system and the hub of seafloor spreading.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
舒良树 主编,《普通地质学》第3版(曾获全国首届优秀教材一等奖)
Shu Liangshu ed., General Geology, 3rd ed. (winner of the 1st National Excellent Textbook Award)
独立核验依据 · Independent verification: 核验依据 2 ISBN 9787116123892（豆瓣书目条目: 普通地质学）
#大洋中脊 #海底扩张 #离散边界
俯冲带为何是地球上最容易发生大地震的地方？
Why are subduction zones the places most prone to the largest earthquakes on Earth?
俯冲带中一端板块插入另一端之下，界面处因摩擦闭锁积累巨大弹性应变，一旦突然错动便释放巨大能量，形成矩震级 9 级左右的特大地震，并常伴生海啸，如 2011 年东日本大地震。
In subduction zones one plate thrusts beneath another, and friction locks the interface, accumulating huge elastic strain that is suddenly released in a giant rupture—producing magnitude-9 megathrust quakes often followed by tsunamis, as in the 2011 Tohoku earthquake.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
舒良树 主编,《普通地质学》第3版(曾获全国首届优秀教材一等奖)
Shu Liangshu ed., General Geology, 3rd ed. (winner of the 1st National Excellent Textbook Award)
独立核验依据 · Independent verification: 核验依据 2 ISBN 9787116123892（豆瓣书目条目: 普通地质学）
#俯冲带 #海啸 #闭锁
什么是震级与烈度？两者有何区别？
What are magnitude and intensity, and how do they differ?
震级（如里氏、矩震级）衡量地震释放的能量大小，由地震波振幅确定，一次地震只有一个震级。烈度描述地表某处实际感受到的破坏程度，随距离震中和地质条件变化，同一地震可有多个烈度值。
Magnitude (e.g., Richter, moment magnitude) measures the energy released, derived from seismic-wave amplitude, and a quake has a single magnitude. Intensity describes the actual shaking and damage at a location, varying with distance and local geology, so one quake yields many intensity values.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
舒良树 主编,《普通地质学》第3版(曾获全国首届优秀教材一等奖)
Shu Liangshu ed., General Geology, 3rd ed. (winner of the 1st National Excellent Textbook Award)
独立核验依据 · Independent verification: 核验依据 2 ISBN 9787116123892（豆瓣书目条目: 普通地质学）
#震级 #烈度 #矩震级