NDLI: An M$_{w}$ based earthquake Catalogue for central, northern and northwestern Europe using a hierarchy of magnitude conversions

Content Provider	Springer Nature Link
Author	Grünthal, G. Wahlström, R.
Copyright Year	2003
Abstract	Data from 25 local catalogues and 30special studies of earthquakes in central,northern and northwestern Europe have beenincorporated into a Databank. The dataprocessing includes discriminating eventtypes, eliminating fake events and dupletsand converting different magnitudes andintensities to M$_{w}$ if this is not givenby the original source. The magnitudeconversion is a key task of the study andimplies establishment of regressionequations where no local relations exist.The Catalogue contains tectonic events fromthe Databank within the area44°N–72°N,25°W–32°E and the time period1300–1993. The lower magnitude level forthe Catalogue entries is setat M$_{w}$ == 3.50. The area covered by thedifferent catalogues are associated withpolygons. Within each polygon only datafrom one or a small number of the localcatalogues, supplemented by data fromspecial studies, enter the Catalogue. Ifthere are two or more such catalogues orstudies providing a solution for an event,a priority algorithm selects one entry forthe Catalogue. Then M$_{w}$ is calculatedfrom one of the magnitude types, or frommacroseismic data, given by the selectedentry according to another priority scheme.The origin time, location, M$_{w}$ magnitude and reference are specified for eachentry of the Catalogue. So is theepicentral intensity, I$_{0}$, if providedby the original source. Following thesecriteria, a total of about 5,000earthquakes constitute the Catalogue.Although originally derived for the purposeof seismic hazard calculation within GSHAP,the Catalogue provides a data base for manytypes of seismicity and seismic hazardstudies.
Starting Page	507
Ending Page	531
Page Count	25
File Format	PDF
ISSN	13834649
Journal	Journal of Seismology
Volume Number	7
Issue Number	4
e-ISSN	1573157X
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2003-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Structural Geology Geophysics/Geodesy Hydrogeology Geotechnical Engineering
Content Type	Text
Resource Type	Article
Subject	Geochemistry and Petrology Geophysics

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