Earthquake catalogues and seismicity models

Students have to be trained in the data elaboration and handling of seismicity data compiled in earthquake catalogs. Basic procedures of probabilistic hazard assessment have to be applied to come up with regional seismicity models.

 

The target area corresponds to the home countries. The students have to contact national institutions and responsible authorities concerning the data availability and the state of national earthquake catalogs including a list of events as well as their epicentral coordinates, magnitude and source parameters. Seismicity models have to be elaborated in terms of occurrence rates of magnitudes

 

For more information and the task, check the metacoon plattform - room NHRE ⇒ Hazard Projects and Advanced Geotechnologies

Earthquake catalogues and seismicity models

(as Part of NHRE: “Hazard Projects and Advanced Geotechnologies")

fig. 1 catalog completeness

Overview and Motivation

Students have to be trained in the data elaboration and handling of seismicity data compiled in earthquake catalogs. Basic procedures of probabilistic hazard assessment have to be applied to come up with regional seismicity models.

The target area corresponds to the home countries. The students have to contact national institutions and responsible authorities concerning the data availability and the state of national earthquake catalogs including a list of events as well as their epicentral coordinates, magnitude and source parameters. Seismicity models have to be elaborated in terms of occurrence rates of magnitudes (see fig. 1 to fig. 3).

fig. 2 Least square fit
fig. 3 Maximum likelihood estimation after Weichert (1980)

The Tasks are specified followingin the scheme below:

Sub-Tasks

Keywords and explanation of basic elements

Points of discussion and elements of presentation
Recommended procedure, required decisions and discussion of evaluation criteria
Check lists

Specification of Tasks

The participants of the project should deal with the following tasks:

Task 1 − Identification of hazard input parameters

Magnitudes and intensities of historical Earthquakes (and existing correlations) Recent fault lines Types of source mechanism (tectonic regime) Source depths

Earthquake catalogues (Coordinates) Search for National or International Data Centers and responsible (authorized governmental) institutions

 
Task 2 − Elaboration of basic data for seismicity models

Areal and fault line elements Seismic zones Location of major cities within active areas (Selection of Reference Sites)

Check of GSHAP input parameters for regional centers Check of published hazard studies GIS-mapping of proposed seismicity models

 
Task 3 − Application of tools (provided by the lectures) to the selected study area

Determination of completeness intervals for relevant magnitude ranges Elaboration of a representative database

Magnitude occurrence rates Appropriate (proposed) attenuation models

 
Task 4 − Presentation of results

⇒ (III) Deliverables

Report

Deliverables (Results)

National Database:

Institutions, Networks, Overview of activities and requests
Database:

Catalogs Earthquakes (epicenters) and locations of major cities Ranking of seismicity and definition of reference site(s)

Report: (including)

Extract of applied earthquake data Seismicity models Explanation of data processing a- and b-values of occurrence rates Graphs

References

Lecture notes and exercises by Ch. Bosse and G. Grünthal

Publications

Ahorner, L., Amstein, S., Golbs, C., Meidow, H., Schwarz, J. (2006):
An earthquake catalogue for Germany and adjacent areas considering engineering demands. In proceedings: 1st European Conference on Earthquake Engineering and Seismology, ID 1956 , Geneva 3 September 
(Data File). [online] www.edac.biz/index.php?id=265

Burkhard M., Grünthal G. (2009):
Seismic source zone characterization for the seismic hazard assessment project PEGASOS by the Expert Group 2 (EG 1b). Swiss Journal of Geosciences: online first (DOI 10.1007/s00015-008-1307-3)

Grünthal, G., Wahlström, R., Stromeyer, D. (2009): 
The unified catalogue of earthquakes in central, northern, and northwestern Europe (CENEC) - updated and expanded to the last millennium. Journal of Seismology 13 (4), 517-541.

Grünthal, G., Wahlström, R., Stromeyer, D. (2009):

Harmonization check of MW within the central, northern, and northwestern European earthquake catalogue (CENEC). Journal of Seismology 13 (4), 613-632.

Gutenberg, B.; Richter, C. F. (1942): Earthquake magnitude, intensity, energy, and acceleration. In: Bulletin of the Seismological Society of America, Bd. 32 (1942) Nr. 3, S. 163-191.

Gutenberg, B.; Richter, C. F. (1956): Earthquake magnitude, intensity, energy, and acceleration: (Second paper). In: Bulletin of the Seismological Society of America, Bd. 46 (1956) Nr. 2, S. 105-145.

Weichert, D. H. (1980): Estimation of the earthquake recurrence parameters for unequal observation periods for different magnitudes. In: Bulletin of the Seismological Society of America, Bd. 70 (1980) Nr. 4, S. 1337-1346.