What Are the Different Types of Seismic Data?

Measures for the Management of Seismic Scientific Data Sharing, Implementation Rule Seismic Scientific Data Classification and Classification Scheme

Seismic data classification and classification scheme

Contents

introduction

Seismic scientific data comes from scientific and technological activities such as observation, monitoring, surveys, experiments, experiments, and research and analysis. Seismic scientific data is an important scientific and technological information resource of the country and an indispensable basic condition platform for supporting seismic scientific and technological innovation. The classification and grading of seismic scientific data is the basis for conducting seismic scientific data sharing. The establishment of a classification and classification scheme for seismic scientific data sharing is conducive to protecting national security, social public interests, and the legitimate rights and interests of data producers, forming a good order for seismic scientific data sharing, and enabling seismic scientific data resources to be used and added in a wide range of applications. Play a greater role in economic development, national defense construction, and people's security.

Seismic data classification and classification scheme

1 Scope

This plan specifies the classification and grading plan for seismic scientific data.

In the seismic science data sharing activities, this scheme is applicable to the classification and classification of seismic science data.

2 Normative references

The clauses in the following documents are incorporated into this clause by reference in this section. For dated references, all subsequent amendments (excluding errata) or revisions are not applicable to this section. However, parties who have reached an agreement under this section are encouraged to study whether the latest versions of these documents can be used. . For undated references, the latest version applies to this section.

DB / T 3-2003 Earthquake and Precursor Items Classification and Code

DB / T 11.1-2006 Seismic data classification and codes Part 1: Basic categories

DB / T 11.2-2006 Seismic data classification and codes Part 2: Seismic observation data

3 Classification of seismic data

3.1 Classification principles

Seismic data classification is based on the scientific and natural attributes of the data and follows the principles of hierarchy, exhaustion, and exclusivity. Guided by this principle:

3.1.1 Scientific

The most stable essential attributes or characteristics of seismic scientific data are selected as the basis and basis for classification.

3.1.2 Systematic

The attributes or characteristics of selected seismic scientific data are systematically arranged in a certain order, and a reasonable scientific classification system is formed to adapt to modern computer network technology and database technology.

3.1.3 Completeness and scalability

Classification reflects both the attributes of the elements and the interrelationships between the elements. It has completeness. It is necessary to ensure the conditions for extension and refinement on the basis of this classification system when adding new seismic scientific data.

3.1.4 compatibility

Coordinate with relevant scientific data classification standards (including relevant international standards) in the field of geosciences.

3.1.5 Applicability

Starting from the earthquake science data sharing service system, local problems are handled in the system as a whole. On the premise of meeting the general tasks and general requirements of the data sharing service system, try to meet the actual needs of data users. As far as possible, the category names should follow the customary names, so as not to confuse the concepts. Keep the code as short and memorable as possible.

3.2 Classification method

Seismic data is classified by lines using the line classification method. Seismic data is divided into several categories, which are divided into medium and large categories.

3.2.1 Major categories

Seismic scientific data is divided into major categories according to the original data acquisition methods, which are divided into seismic observation data, seismic detection data, seismic survey (examination) data, seismic experiments and test data, seismic thematic data, comprehensive data on earthquake prevention and mitigation, and other seismic scientific data. A big category.

3.2.2 Medium

Seismic observation data is divided into middle classes according to the disciplines to which the data belong.

3.2.3 Small class

According to the level of observation data output and its related factors, the small-scale data is classified into four levels: basic data, original data, processing data, and other data.

At each level, the sub-categories of seismic data are mainly divided according to the scale of the network, and are divided into seismic stations (single), local seismic networks (including telemetry networks, dedicated networks, and social networks). , Provincial regional seismic network, national seismic network and global seismic network. Strong earthquake data and seismic data are basically the same. For geomagnetism, geoelectricity, underground fluids, geomorphology, fixed-point crustal deformation, gravity, seismic telemetry and other observational data, small categories are mainly divided according to different observation objects in the same observation category. The determination of observation objects is mainly based on certain geophysical quantities or Based on geochemical quantities.

3.3 coding method

This section adopts the seismic data encoding method specified in DB / T 11.1-2006. It uses a mixed alphanumeric code with a code length of 6 digits. The first digit is fixed to the letter D, which represents the seismic data, and the second digit represents the large category. Three digits indicate medium class, and the fourth and fifth digits indicate small class. The sixth bit indicates the attribute.

The encoding of the second and third digits representing the large and medium classes follows the regulations in DB / T 11.1-2006.

The first digit of the left side of the small class code is 1 for basic data, 2 for auxiliary data, 3 for original data, 4 to 9 for processing data at different levels, and A for other data. For seismic data, the second digit from the left of the small-class codes generally indicates the area covered by the data, 1 for stations, and 2 for local seismic networks (including telemetry networks, dedicated networks, and social networks), 3 Indicates the provincial regional seismic network, 4 indicates the national seismic network, 5 indicates the China Global Seismic Network, 8 indicates the seismic data from a foreign seismic data center, and 9 indicates data that does not directly involve the area; , Subsurface fluid, crustal deformation, gravity and other observation data. The second digit from the left of the small category code is mainly used to represent different observation objects in the same observation category, and the attribute bit represents the measurement item.

For data other than the subclasses listed in the table in Chapter 6, the corresponding bits of the subclass code are represented by Z.

The specific coding structure is as follows:

Among them, when the sixth bit code is "0", it means there is no attribute requirement.

3.4 Classification scheme

See Appendix A for specific plans.

4 Classification of seismic scientific data

4.1 Classification principle

The classification of seismic scientific data is to standardize and rationally develop and use scientific data, and to continue to carry out in-depth seismic data sharing. The classification of seismic scientific data is based on the following principles:

4.1.1 Strictly abide by national confidentiality regulations and safeguard national security

State-owned seismic scientific data is an important part of the national security system. Scientific data above the secret level is not provided for public sharing, and internal scientific data is not involved in international exchange.

4.1.2 Promote the flow of seismic scientific data and promote its full play

The classification of seismic scientific data is based on the guiding principles of promoting the rational flow and use of scientific data, and maximizing the utility value of seismic scientific data. Make seismic data into productivity and economic and social benefits.

4.2 Classification method

The classification of seismic scientific data mainly considers the scope of publication and sharing of seismic scientific data.

Seismic scientific data is related to national security and national interests and has its strategic characteristics. According to the degree of influence on national security, the "Confidentiality Law" stipulates the confidentiality levels of various types of scientific data in different fields: top secret, confidential, secret, and public. The scope of earthquake science data release and sharing is divided into:

1. International sharingrefers to data that can be exchanged or disclosed between countries, regions, and international agencies for complete sharing.

2. Intra-country sharing Refers to the data that can be exchanged and used among various institutions and groups within the country. It can be completely shared in the country and cannot be provided abroad.

3 Intra-organizational sharingThis means that data and internal data can be exchanged and used between departments and individuals within the institution.

4 Restricted sharingrefers to data that involves national security or has a particularly significant impact on national economic construction. It is strategic and confidential data, including:

(1) Top-secret data: special test data related to national security;

(2) Confidential data: high-precision geographic information and gravity data with important military application value;

(3) Secret data: earthquake prediction information that has an important impact on economic construction and social stability; unpublished scientific research results and data that have important effects on promoting scientific development.

4.3 Classification scheme

Based on the characteristics of seismic science data sharing strategy, the shared release data is divided into four levels:

Primary data: Any data that is allowed to be published publicly on the Internet, such as earthquake announcements, bulletins, and popular science information.

Secondary data: Any data that can be shared internationally and domestically is mainly data products.

Third-level data: Any data that can be provided to domestic government users and public welfare government agencies for conducting business, that is, data that is shared domestically.

Level 4 data: It is mainly used for internal and domestic business users of the seismic system, including raw data and strategic confidential data.

See Appendix A for specific data levels.

4.4 Level determination

4.4.1 Level determination of new remittance data

The level of the newly transferred data is determined by the earthquake science data sharing center and sub-center according to Appendix A. In the event of new data not listed in Appendix A or there are doubts or disputes over the data level, the Seismic Data Sharing Center is responsible for determining its type and level.

4.4.2 Data Level Adjustment

The data level adjustment was proposed by the earthquake science data sharing center, and implemented after review and approval by the competent department.