Standard No.:	GB/T 18207.1-2026
English Name:	Terminology of protecting against and mitigating earthquake disasters—Part 1：Basic terms
Chinese Name:	防震减灾术语 第1部分：基本术语
Professional Classification:	GB    National Standard
Source Content Issued by:	SAMR, SAC
Issued on:	2026-04-30
Implemented on:	2026-11-1
Status:	to be valid
Superseding:	GB/T 18207.1-2008 Terminology of protecting against and mitigating earthquake disasters - Part 1:Basic terms
Target Language:	English
File Format:	PDF
Word Count:	14500 words
Translation Price(USD):	435.0
Delivery:	via email in 1~5 business day

GB/T 18207.1-2026 Terminology of protecting against and mitigating earthquake disasters—Part 1：Basic terms English, Anglais, Englisch, Inglés, えいご This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered. ICS CCS National Standard of the People's Republic of China ‌GB/T 18207.1-2026 Terminology of protecting against and mitigating earthquake disasters - Part 1：Basic terms 防震减灾术语 第1部分：基本术语 Issue date: 2026-03-31 Implementation date: 2026-10-01 Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China the Standardization Administration of the People's Republic of China Contents Foreword Introduction 1 Scope 2 Normative References 3 Earthquake 4 Earthquake Monitoring and Early Warning 5 Earthquake Prediction and Forecasting 6 Earthquake Disaster Prevention 7 Earthquake Emergency Response and Rescue 8 Postearthquake Disaster Relief and Reconstruction Bibliography Index Terminology of earthquake protection and disaster mitigation — Part 1: Basic terms 1 Scope This document defines the basic terms and their definitions in the field of earthquake protection and disaster mitigation. This document applies to work related to earthquake protection and disaster mitigation and the development of relevant standards, as well as to the fields of scientific research, education, news and publishing. 2 Normative References This document has no normative references. 3 Earthquake 3.1 earthquake Shaking of the ground. NOTE 1: Includes natural earthquakes (tectonic earthquakes, volcanic earthquakes), induced earthquakes (earthquakes triggered by mining, reservoir impoundment, shale gas extraction, etc.) and artificial earthquakes (earthquakes generated by blasting, nuclear explosions, falling objects, etc.). NOTE 2: Generally refers to tectonic earthquakes, a type of natural earthquake. 3.2 hypocenter The point within the Earth where rock rupture initiates during an earthquake. 3.3 seismic source The region of rock rupture within the Earth during an earthquake. 3.4 magnitude A relative measure of the size of an earthquake. 3.5 seismotectonic Geological structures associated with the generation and occurrence of earthquakes. 3.6 seismic intensity The degree of ground shaking and its effects caused by an earthquake. 3.7 seismic wave A wave emitted from the hypocenter during an earthquake and propagating within the Earth and/or along the Earth‘s surface. 3.8 epicenter The projection of the hypocenter onto the Earth’s surface. 3.9 meizoseismal area The area enclosed by the highest intensity isoseismal line of an earthquake. NOTE: Typically the area of strongest ground motion and most severe damage. 3.10 macroepicenter The location of the most severe earthquake damage within the meizoseismal area. 3.11 microepicenter The epicentral location determined using instrumentally recorded seismic wave information. 3.12 hypocentral distance The distance from any point on the ground surface to the hypocenter. 3.13 epicentral distance The distance from any point on the ground surface to the epicenter. 3.14 epicentral intensity The seismic intensity (3.6) of the meizoseismal area. 3.15 feltless earthquake An earthquake that is not felt by most people near the epicenter. 3.16 felt earthquake An earthquake that is distinctly felt near the epicenter. 3.17 ultramicroearthquake An earthquake with a magnitude less than 1. 3.18 microearthquake An earthquake with a magnitude equal to or greater than 1 and less than 3. 3.19 small earthquake An earthquake with a magnitude equal to or greater than 3 and less than 4. 3.20 moderate earthquake An earthquake with a magnitude equal to or greater than 4 and less than 5. 3.21 moderate to strong earthquake An earthquake with a magnitude equal to or greater than 5 and less than 6. 3.22 strong earthquake An earthquake with a magnitude equal to or greater than 6 and less than 7. 3.23 large earthquake An earthquake with a magnitude equal to or greater than 7 and less than 8. 3.24 great earthquake An earthquake with a magnitude equal to or greater than 8. 3.25 destructive earthquake An earthquake that may cause casualties or property damage. 3.26 severely destructive earthquake An earthquake that causes severe casualties and property damage, rendering the affected area partially or completely unable to recover on its own. 3.27 local earthquake An earthquake with an epicentral distance within 1°. NOTE: 1° is approximately 111 km. 3.28 regional earthquake An earthquake with an epicentral distance in the range of 1° to 13°. 3.29 midfar earthquake An earthquake with an epicentral distance in the range of 13° to 30°. 3.30 teleseism An earthquake with an epicentral distance in the range of 30° to 180°.