+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Magnitude and catalogue completeness study

Magnitude and catalogue completeness study

Proceedings of Technical Groups - Institution of Professional Engineers New Zealand 24(1G): 156-162

A global catalogue of earthquakes has been established by extracting information from the catalogue of the International Seismological Centre (ISC). Other magnitude reports, particularly the moment magnitude M (sub W) as calculated from the Harvard CMT solutions, have been added. An extensive study and comparison of magnitudes has been undertaken, with the following results: There is a systematic difference between M (sub W) and the surface-wave magnitude M (sub S) , which varies slightly with tectonic setting. Using M (sub W) as a reference, a 'best' magnitude can be defined: choose M (sub W) if available and otherwise the largest surface-wave or body-wave magnitude from ISC or the US National Earthquake Information Center (NEIC). The global magnitude-frequency distribution of the best magnitude has been very stable over the last 32 years with about 120 events larger than magnitude 6 every year. A correction can be calculated to match the ISC body-wave magnitude, which systematically underestimates the earthquake size, with the best magnitude. The Harvard catalogue seems to miss some events of magnitude 6.1 or larger. The loss of data is still being investigated. The b-value of the Gutenberg-Richter law has been found to be close to one except for midocean ridges or zones of complex tectonic setting such as New Zealand. Furthermore, a maximum likelihood method has been developed to combine two or more magnitudes to find the cut-off magnitude and the b-value.

Please choose payment method:

(PDF emailed within 1 workday: $29.90)

Accession: 019361326

Download citation: RISBibTeXText

Related references

Temporal and spatial variations in the magnitude of completeness for homogenized moment magnitude catalogue for northeast India. Journal of Earth System Science 121(1): 19-28, 2012

Functional shape of the earthquake frequency-magnitude distribution and completeness magnitude. Journal of Geophysical Research: Solid Earth 117(B8), 2012

A global probability-based magnitude of completeness PMC study. Eos, Transactions, American Geophysical Union 89.53, Suppl., 2008

Statistical estimation of the maximum magnitude and its uncertainty from a catalogue including magnitude errors. Advances in Natural and Technological Hazards Research 6: 25-37, 1996

Statistical analysis of the completeness of a seismic catalogue. Natural Hazards 25(3): 245-258, 2002

Collaborative research; seismic catalogue completeness and accuracy. Pages 456-462 2001, 2001

Completeness analysis of the historical earthquake catalogue in China. Earthquake Research in China = Zhongquo Dizhen 9(4): 365-369, 1995

Spatiotemporal variation of minimum magnitude of completeness in the JMA catalog. Quarterly Journal of Seismology 65(1-4): 111-122, 2002

Multiscale Mapping of Completeness Magnitude of Earthquake Catalogs. Bulletin of the Seismological Society of America 103(4): 2188-2202, 2013

Minimum magnitude of completeness and rates of seismicity in the New Madrid region. Seismological Research Letters 63(3): 395-405, 1992

Analysis of the completeness magnitude and seismic network coverage of Japan. Bulletin of the Seismological Society of America 100.6, 2010

Assessing the quality of earthquake catalogues; estimating the magnitude of completeness and its uncertainty. Bulletin of the Seismological Society of America 95(2): 684-698, 2005

Bayesian estimation of the spatially varying completeness magnitude of earthquake catalogs. Bulletin of the Seismological Society of America 101.3, 2011

Effects of magnitude accuracy and completeness data on seismic hazard parameters. Acta Seismologica Sinica (English Version) 9(4): 635-644, 1996

Estimation of completeness magnitude considering daily variation in earthquake detection capability. Geophysical Journal International 194(3): 1909-1919, 2013