GB17740-2017

General ruler for earthquake magnitude

地震震级的规定

GB 17740-2017 は現行の中国強制国家規格です：General ruler for earthquake magnitude。業界：建設。テーマ：製品安全。施行日：2017年12月1日。

適用可否は製品範囲、認証ルート、所管当局の通知、移行規定によって異なります。コンプライアンス判断に使う前に、翻訳をご依頼いただくか公式情報源をご確認ください。

コンプライアンス概要

この概要は現在英語のみで提供しています。

適用範囲

This standard specifies the measurement methods and usage rules for earthquake magnitude. It applies to earthquake monitoring, emergency response, information release, science popularization, and news reporting. This standard is mandatory for all seismic networks and related agencies involved in earthquake information dissemination, but it does not apply to other types of magnitudes used in scientific research.

技術要求

The standard defines the measurement methodologies for various types of earthquake magnitudes, including local magnitude (ML_), surface wave magnitude (MS_), and moment magnitude (Mw_). It outlines the specific formulas and parameters required for calculating each magnitude type based on seismic wave records. Seismic networks must measure all possible magnitudes without converting them into one another. It also establishes strict rules for magnitude publication. For rapid earthquake information reports, moment magnitude (Mw_) should be prioritized if the seismic moment can be determined promptly. If the seismic moment cannot be determined in time, specific magnitude types must be selected based on earthquake depth and magnitude range. Furthermore, the standard mandates that the published magnitude be represented simply as "M" without additional descriptive terms like "Richter magnitude" or "moment magnitude". All levels of government and news media must use this unified published magnitude for emergency response and public communication.

試験方法

The standard details the measurement procedures using simulated short-period and medium-long-period seismograph records. Key methods include measuring the maximum amplitude of S-waves for local magnitude and the maximum ground motion velocity of surface waves for broadband surface wave magnitude. Calibration functions and specific instrument transfer functions must be applied as specified in the normative appendices.

よくある質問

What systems or organizations are regulated under GB 17740-2017?

It regulates seismic monitoring networks, earthquake information systems, government agencies, and news media outlets involved in earthquake reporting and emergency response in China.

Are there any updates from the previous version of GB 17740-2017?

Yes, compared to GB 17740-1999, this version adds 16 new terms, introduces measurement methods for broadband and moment magnitudes, and modifies the rules for magnitude publication.

How should the earthquake magnitude be presented to the public according to GB 17740-2017?

The externally published magnitude must be represented simply as "M" without any additional prefixes or descriptive terms like "Richter" or "moment".

The summary above provides a high-level overview of GB 17740-2017. To ensure complete compliance for your seismic monitoring systems or reporting protocols entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 17740-2017 today to access all detailed parameters, formulas, and calibration tables.

適用のヒント

種別: 基礎
CCS: P15
ICS: 91.120.25
所管部門: China Earthquake Administration
技術委員会: National Technical Committee on Earthquake of Standardization Administration of China