Locations and source parameters for calibration events in Turkey, Saudi Arabia, Ethiopia, and Tanzania

J. P. O'Donnell, S. Shamsalsadati, R. A. Brazier, A. A. Nyblade

Research output: Contribution to journalArticle

Abstract

The identification of GT595% seismic events is of fundamental importance to ground-based explosion monitoring. However, the lack of GT0 event (i.e., explosion) data needed to develop new regionally tailored GT595% event-identification criteria hampers the identification of new events. As a means of circumventing this problem, we show that existing regionally tailored GT595% criteria are potentially transferrable to tectonic analogs. We invoke this principle to identify new calibration events in Turkey, Tanzania, and Saudi Arabia. Six events are located in the east Anatolian plateau, meeting existing GT595% criteria developed for the tectonically analogous Tibetan plateau. Nine events are located in the Tanzania craton and 15 in the Arabian shield, meeting GT595% criteria developed for the tectonically analogous Kaapvaal craton. We additionally expand the existing database of GT595% events in Ethiopia by identifying six events in the Afar region, fulfilling GT595% criteria previously developed for the Ethiopian Rift. Source properties including the moment tensor, moment magnitude, radiated energy, corner frequency, and static stress drop are determined for the larger-magnitude events identified in each region.

Original languageEnglish (US)
Pages (from-to)145-154
Number of pages10
JournalBulletin of the Seismological Society of America
Volume108
Issue number1
DOIs
StatePublished - Feb 2018

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Ethiopia
Tanzania
Saudi Arabia
Turkey
source parameters
Explosions
craton
explosion
plateau
Calibration
calibration
moment tensor
Tectonics
Tensors
shield
tectonics
Monitoring
monitoring
cratons
energy

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Geochemistry and Petrology

Cite this

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abstract = "The identification of GT595{\%} seismic events is of fundamental importance to ground-based explosion monitoring. However, the lack of GT0 event (i.e., explosion) data needed to develop new regionally tailored GT595{\%} event-identification criteria hampers the identification of new events. As a means of circumventing this problem, we show that existing regionally tailored GT595{\%} criteria are potentially transferrable to tectonic analogs. We invoke this principle to identify new calibration events in Turkey, Tanzania, and Saudi Arabia. Six events are located in the east Anatolian plateau, meeting existing GT595{\%} criteria developed for the tectonically analogous Tibetan plateau. Nine events are located in the Tanzania craton and 15 in the Arabian shield, meeting GT595{\%} criteria developed for the tectonically analogous Kaapvaal craton. We additionally expand the existing database of GT595{\%} events in Ethiopia by identifying six events in the Afar region, fulfilling GT595{\%} criteria previously developed for the Ethiopian Rift. Source properties including the moment tensor, moment magnitude, radiated energy, corner frequency, and static stress drop are determined for the larger-magnitude events identified in each region.",
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Locations and source parameters for calibration events in Turkey, Saudi Arabia, Ethiopia, and Tanzania. / O'Donnell, J. P.; Shamsalsadati, S.; Brazier, R. A.; Nyblade, A. A.

In: Bulletin of the Seismological Society of America, Vol. 108, No. 1, 02.2018, p. 145-154.

Research output: Contribution to journalArticle

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