全部书籍

1 Primary & Middle School Mathematics1–9 年级在线 2 High School Mathematics10–12 年级在线 3 University Mathematics — Year 1本科一年级在线 4 University Mathematics — Year 2本科二年级在线 5 University Mathematics — Year 3本科三年级在线

1 Primary & Middle School Physics1–9 年级在线 2 High School Physics10–12 年级在线 3 University Physics — Year 1本科一年级在线 4 University Physics — Year 2本科二年级在线 5 University Physics — Year 3本科三年级在线

1 School Chemistry — Grades 1 to 121–12 年级在线 2 University Chemistry — Year 1本科一年级在线 3 University Chemistry — Year 2本科二年级在线 4 University Chemistry — Year 3本科三年级在线

1 Primary & Middle School Biology1–9 年级在线 2 High School Biology10–12 年级在线 3 University Biology — Year 1本科一年级在线 4 University Biology — Year 2本科二年级在线 5 University Biology — Year 3本科三年级在线

1 Primary & Middle School Earth and Space Sciences1–9 年级在线 2 High School Earth and Space Sciences10–12 年级在线 3 University Earth and Space Sciences — Year 1本科一年级在线 4 University Earth and Space Sciences — Year 2本科二年级在线 5 University Earth and Space Sciences — Year 3本科三年级在线

1 Markets I: The Ecosystem and Exchange-Traded Markets市场在线 2 Markets II: Rates, FX and Credit市场在线 3 Markets III: Commodities, Energy and Crypto市场在线 4 Quantitative Methods方法在线 5 Derivatives and Volatility衍生品在线 6 Rates, Credit, XVA and Risk利率、信用与风险在线 7 Research Craft: Predictors, Backtests, Measurement, Portfolios研究在线 8 Strategies I: Equities and Futures策略在线 9 Strategies II: Volatility, Relative Value, Macro and the Bank Desks策略在线 10 Microstructure and Execution交易执行在线 11 Market Making and High-Frequency Trading做市在线 12 Machine Learning for Markets机器学习在线 13 Low-Latency Software技术在线 14 Networks, Hardware and Trading Infrastructure技术在线 15 Research, Data and Risk Platforms技术在线 16 The Desk and the Firm公司运营在线 17 The Industry: Firms, Roles and Careers职业发展在线 18 Interviews I: Maths, Probability and Speed职业发展在线 19 Interviews II: Markets, Trading Games and the Final Round职业发展在线 20 Interviews III: Code职业发展在线

全部游戏 Math Fuse Word Reactor Atlas Dash

应用关于

Coach

English Français Español Nederlands Português हिन्दी العربية Bahasa Indonesia 简体中文 বাংলা

登录开始阅读

书籍暂未推出简体中文版——当前显示英文版。

Earth and Space Sciences · 术语表

什么是 b-value, magnitude of completeness？

又称： b-value · magnitude of completeness

Definition 18.14 University Earth and Space Sciences — Year 1 · 第 18 章 — The Earthquake Source

The constant $b$ of the Gutenberg–Richter law of a region is its b-value. The magnitude of completeness of a catalogue is the smallest magnitude above which it records every earthquake of the region and period.

$The 7031 earthquakes of magnitude 6 or more in the world, 1976–2025 (U.S. Geological Survey catalogue). (a) The yearly number of earthquakes of magnitude at least M; the line is the least-squares fit of _10 N against M from 6.0 to 7.5, where each count exceeds 200: _10 N = 8.20 - 1.01\,M per year. Above magnitude 8 the few events fall below the line. (b) The share of the total seismic moment released by the earthquakes of magnitude at least M, each moment computed as 101.5M + 9.1 N\, m: the 40 earthquakes of magnitude 8 or more released 63\,\% of it.$

The

7031

earthquakes of magnitude 6 or more in the world, 1976–2025 (U.S. Geological Survey catalogue). (a) The yearly number of earthquakes of magnitude at least

M

; the line is the least-squares fit of

\log_{10} N

against

M

from 6.0 to 7.5, where each count exceeds 200:

\log_{10} N = 8.20 - 1.01\,M

per year. Above magnitude 8 the few events fall below the line. (b) The share of the total seismic moment released by the earthquakes of magnitude at least

M

, each moment computed as

10^{1.5M + 9.1}

\mathrm{N}\,\mathrm{m}

: the 40 earthquakes of magnitude 8 or more released

63\,\%

of it.

在原文中阅读 →