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GB/T 19721.4-2022: The issue of marine forecasts and warnings - Part 4: The issue of tsunami warnings
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The issue of marine forecasts and warnings - Part 4: The issue of tsunami warnings
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GB/T 19721.4-2022
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Basic data | Standard ID | GB/T 19721.4-2022 (GB/T19721.4-2022) | | Description (Translated English) | The issue of marine forecasts and warnings - Part 4: The issue of tsunami warnings | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | A45 | | Classification of International Standard | 07.060 | | Word Count Estimation | 14,115 | | Date of Issue | 2022-12-30 | | Date of Implementation | 2023-04-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 19721.4-2022: The issue of marine forecasts and warnings - Part 4: The issue of tsunami warnings
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ICS 07.060
CCSA45
National Standards of People's Republic of China
Marine Forecasts and Warnings Issued
Part 4.Tsunami Warning Issued
Posted on 2022-12-30
2023-04-01 Implementation
State Administration for Market Regulation
Released by the National Standardization Management Committee
foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules for Standardization Documents"
drafting.
This document is part 4 of GB/T 19721 "Issuance of Marine Forecasts and Warnings". GB/T 19721 has published the following parts.
--- Part 1.Storm surge warning issued;
--- Part 2.Wave forecast and warning issuance;
--- Part 3.Sea ice forecast and warning issuance;
--- Part 4.Tsunami warning issued;
--- Part 5.SST forecast release.
Please note that some contents of this document may refer to patents. The issuing agency of this document assumes no responsibility for identifying patents.
This document is proposed by the Ministry of Natural Resources of the People's Republic of China.
This document is under the jurisdiction of the National Marine Standardization Technical Committee (SAC/TC283).
This document was drafted by. National Marine Environmental Forecasting Center.
The main drafters of this document. Zhao Lianda, Fan Tingting, Wang Peitao, Wang Zongchen, Sun Lining, Xu Zhiguo, Li Hongwei, Shi Jianyu, Yuan Ye.
Introduction
GB/T 19721 "Issuance of Marine Forecasts and Warnings" aims to guide the issuance of marine forecasts and warnings, establish the forecast and
The principles, contents and technical requirements of the alert release are proposed to be composed of 6 parts.
--- Part 1.Storm surge warning issued. The purpose is to stipulate the classification and content requirements of storm surge warnings in coastal areas of our country.
--- Part 2.Wave forecasts and warnings issued. The purpose is to specify the classification and content requirements of wave forecasts and warnings.
--- Part 3.Sea ice forecast and warning issued. The purpose is to define the classification of sea ice forecasts and warnings in the Bohai Sea and the northern part of the Yellow Sea,
content requirements.
--- Part 4.Tsunami warning issued. The purpose is to stipulate the classification and content requirements of tsunami warnings in coastal areas of our country.
--- Part 5.SST forecast release. The purpose is to stipulate the classification and content requirements of SST forecast in my country.
--- Part 6.Current forecast release. The purpose is to stipulate the classification and content requirements of ocean current forecasting in my country.
The issuance of tsunami warnings began in.2006.In recent years, with the development of tsunami warning issuance and the need for marine disaster prevention and mitigation,
With the continuous improvement of demand, the tsunami warning service urgently needs corresponding standards and specifications. In order to meet the actual needs of tsunami warning work, further improve
The scientificity and practicability of tsunami disaster response, unified standardization of production and release of tsunami warning products.
The preparation of this document refers to the "Marine Disaster Emergency Plan" (2019) issued by the Ministry of Natural Resources, focusing on tsunami warning and information products.
Classification is established, and the content and format of different products are standardized. This document provides a unified framework for the release of tsunami warning products,
It is convenient for the standardized production of tsunami warning products, and at the same time, it is consistent with related international tsunami warning products, which can better serve our country
Tsunami disaster early warning business to reduce disaster losses.
Marine Forecasts and Warnings Issued
Part 4.Tsunami Warning Issued
1 Scope
This document specifies the classification, content and format of tsunami warnings.
This document is applicable to the earthquake and tsunami warning services carried out by marine forecasting agencies. Issue tsunami warnings for volcanoes, landslides, and other factors
Can refer to use.
2 Normative references
This document has no normative references.
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1
tsunami
The long-period and small-amplitude gravity waves excited by underwater earthquakes, volcanic eruptions, or underwater collapses and landslides travel at a speed of hundreds of kilometers per hour.
When it reaches the shore, it forms a huge wave that is fierce and harmful.
[Source. GB/T 39419-2020, 2.1]
3.2
tsunami amplitude
The absolute value of the difference between the peak (trough) of the tsunami and the height of the undisturbed sea surface at that time.
[Source. GB/T 39419-2020, 2.2]
3.3
The maximum value of tsunami amplitude in a certain place or area during a tsunami process.
[Source. HY/T 0281-2020,4.5]
3.4
tsunami warning tsunami warning
After an event with the potential to generate a tsunami, such as underwater earthquakes, volcanic eruptions, or underwater cave-ins and landslides, it is expected that tsunamis may affect the forecast area.
It is a warning marine map that contains information such as tsunami generation, tsunami arrival location, tsunami amplitude, and danger level issued when a disaster occurs within the country.
forecast.
[Source. GB/T 39628-2020, 4.2.9]
3.5
Tsunami information tsunami information
Tsunamis are not expected to impact the forecast area following events that could trigger a tsunami, such as underwater earthquakes, volcanic eruptions, or underwater cave-ins and landslides.
When a disaster occurs within the country, it is a warning marine forecast that notifies whether a tsunami will occur and the amplitude of the tsunami.
[Source. GB/T 39628-2020, 4.2.8]
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