Spatiotemporal b-value variations and their significance over the Groningen gas field, in The Netherlands

Joana E. Martins, Dirk Kraaipoel, Jaap Breunese, Annemarie Muntendam-Bos

Research output: Contribution to conferencePosterScientific

Abstract

Variations of b-values in Gutenberg-Richter’s law has been proven to provide insights on earthquake triggering mechanisms. These b-value variations express changes in the rate of occurrence of small earthquakes relative to large ones. Geophysical processes correlated with b-value variations have been identified using earthquake catalogues over natural tectonically active environments. Not so much is known over anthropogenic exploration sites due to the lack of dedicated seismometers in place and therefore the reduced number of recorded events.

In the early 1990's, nearly after 30 years of gas production, small seismic events started to be detected at the Groningen gas field. Several efforts to measure these seismic events let to a unique seismic network and an earthquake catalogue available through KNMI’s website. We perform a temporal, spatial and spatiotemporal b-value analysis for which we use 800 events from early 90’s up to now with a magnitude lower limit of 1.1 (magnitude of completeness).
Original languageEnglish
Number of pages1
Publication statusPublished - 2018
EventBanff 2018 International Induced Seismicity Workshop - Banff Park Lodge, Banff, Canada
Duration: 24 Nov 201827 Nov 2018
http://www.inducedseismicity.ca/banff2018/

Conference

ConferenceBanff 2018 International Induced Seismicity Workshop
Abbreviated titleBanff 2018
CountryCanada
CityBanff
Period24/11/1827/11/18
Internet address

Keywords

  • Induced seismicity
  • Groningen
  • B-value
  • Gutenberg-Richter

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