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DBT4-2025: Coding rules for earthquake monitoring station
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DB/T 4-2003	English	2269	Add to Cart	13 days [Need to translate]	Code of seismic station

DB/T 4-2025: Coding rules for earthquake monitoring station

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Earthquake Industry Standards of the People's Republic of China China Earthquake Administration issued a statement. Earthquake monitoring station coding rules Replaces DB/T 4-2003 Published on 2025-11-27 Implemented on June 1, 2026 CCS P 15 ICS 91.120.25 Preface III Introduction IV 1.Scope 1 2 Normative References 1 3.Terms and Definitions 1 4.General Coding Rules 2 5.Encoding Methods 2 6.Code usage 4 Appendix A (Informative) Sequence Code Encoding 5 Appendix B (Informative) Basic Codes of Earthquake Monitoring Center Stations 6 Reference 11

Table of contents

Foreword This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents". Drafting. This document replaces DB/T 4-2003 "Seismic Station Codes". Compared with DB/T 4-2003, apart from structural adjustments and editorial changes, The main technical changes are as follows. a) The term "seismic station" has been changed (see 3.1, Chapter 3 of the.2003 edition), and the terms "code" (see 3.2) and "code length" have been added. (See 3.3), "alphanumeric codes" (see 3.4), "sequence codes" (see 3.5); b) The coding principles have been changed (see 4.1 to 4.5, 4.1 in the.2003 edition); c) The encoding method was changed (see Chapter 5, 4.2 of the.2003 edition), adopting two code representations. basic code and extended code; d) A section on "Code Usage" (see Chapter 6) has been added, outlining the usage requirements for both code types; e) The “Number Code Table” has been changed (see Appendix B, Chapter 5 of the.2003 edition). Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents. This document was proposed by the China Earthquake Administration. This document is under the jurisdiction of the Technical Committee on Standardization of Earthquake Monitoring and Forecasting. This document was drafted by. Gansu Provincial Earthquake Administration, Shenzhen Institute of Disaster Prevention and Mitigation Technology, China Earthquake Networks Center, China Geological Environment Monitoring Institute. Guangdong Provincial Earthquake Administration, Jiangsu Provincial Earthquake Administration, and the First Monitoring Center of the China Earthquake Administration. The main drafters of this document are. He Shaolin, Fan Chunyan, Zhou Zhonghong, He Yujie, Kang Ying, Chen Jifeng, Liang Jianhong, Wang Jun, Huang Wenhui, and Yao Yuxia. Li Minjuan and Duan Tianqi. The release history of this document and the document it replaces is as follows. --First published in.2003 as DB/T 4-2003 "Seismic Station Code"; --This is the first revision.

Introduction

The earthquake monitoring station code is an important identification mark for earthquake monitoring stations. Since its implementation, DB/T 4-2003 has been used in the management of earthquake monitoring stations. It has played an important role in the management, processing and exchange of earthquake monitoring data. The main reasons for this revision are as follows. --DB/T 4-2003 uses a 5-digit numeric code, which is only applicable to a single province (autonomous region, municipality, or special administrative region) and covers no more than [number missing] [units missing]. The status of 999 earthquake monitoring stations. This is in line with the official operation of the National Earthquake Intensity Rapid Reporting and Early Warning Project, and other projects. The implementation of this system has enabled earthquake monitoring in many provincial-level administrative regions of my country, such as Sichuan Province, Yunnan Province, Xinjiang Uygur Autonomous Region, and Gansu Province. With more than 1,000 monitoring stations, DB/T 4-2003 can no longer meet the current and future needs for earthquake monitoring station coding. --With the expansion of earthquake services, several earthquake service systems have been operating online and providing services for many years, and different application systems have used them. Different coding methods for earthquake monitoring stations mean that the coding method provided by DB/T 4-2003 is no longer well adapted to the different realities. Application requirements. The main revisions are as follows. --Uses both basic and extended codes to ensure compatibility with multiple earthquake services that have been operating online for many years. The actual situation of different coding methods in the system, and how to meet the needs of different application systems using different coding methods for earthquake monitoring stations in the future. need; --The basic code is an expansion of the 5-digit numeric code in DB/T 4-2003 into a 5-digit alphanumeric code, suitable for a province. The current situation of having over 999 earthquake monitoring stations within (autonomous regions, municipalities, and special administrative regions) requires addressing the issue of insufficient code capacity in DB/T 4-2003. Insufficient defects. Earthquake monitoring station coding rules

1 Scope

This document establishes the coding principles and methods for earthquake monitoring stations, as well as the requirements for using earthquake monitoring station codes. This document applies to the coding of earthquake monitoring stations constructed by the earthquake industry, as well as the coding of earthquake monitoring stations constructed by local governments and enterprises in other industries. Compiled for reference and use.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are listed below. For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies. document. GB/T 2260-2007 Administrative Division Codes of the People's Republic of China GB/T 2659-2000 Codes for the Names of Countries and Regions

3 Terms and Definitions

The following terms and definitions apply to this document. 3.1 earthquake monitoring station The basic unit for earthquake observation or earthquake observation management. [Source. DB/T 99-2024, 3.2, with modifications] 3.2 code A single character or a group of characters that represent a specific thing or concept. Note. These characters can be Arabic numerals, letters, or other symbols that are easy for humans and machines to recognize and process. [Source. GB/T 10113-2003, 2.2.5] 3.3 code length The number of valid characters contained in a code. [Source. GB/T 10113-2003, 2.2.11] 3.4 Alphanumeric code A code consisting of a mixture of Latin letters and Arabic numerals. Note. To enhance visual clarity, other symbols such as spaces, "-", and "/" may be introduced. [Source. GB/T 10113-2003, 2.2.15] 3.5 Sequential code Codes that identify coded objects using the order of Arabic numerals or Latin letters. ...