Crockett, R. G. M., Gillmore, G. K., Phillips, P. S. and Gilbertson, D. D. (2007) Were the 26 December 2004 Sumatran earthquake and tsunami tidally triggered? In: Proceedings of the Second IMA International Conference on Flood Risk Assessment. London: Institute of Mathematics and its Applications (IMA). 9780905091204.
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Abstract:
This paper describes observation and quantification of tidally synchronous earthquake incidence in the period around the 26 December 2004 Sumatran earthquake/tsunami event. In addition, three other recent catalogued Indonesian earthquake/tsunami events are examined, as is the 01 April 2007 Solomon Islands event which occurred during the preparation of this paper.
For the 26 December 2004 event, the relationship indicates earthquake inducement via ocean tidal loading and, during the ten-month period of high earthquake activity in this region, earthquake incidence associated with tidal-loading maxima was (a) 38% and (b) 86% higher than the period averages for the full and declustered earthquake catalogues respectively. A preliminary investigation of the Solomon Islands event indicates a similar relationship, although the inducement appears to be via earth tides in this case, and incidence associated with earth-tide maxima in this region was (a) 70% and (b) 50% higher than the period averages for the full and declustered major-earthquake catalogues respectively. It is concluded that the 26 December 2004 earthquake/tsunami event was tidally triggered, and the 01 April 2007 Solomon Islands also on the basis of the preliminary investigation, but that the three other Indonesian events investigated were not, with two of these displaying no tidal influence.
Subjects:
G Geography. Anthropology. Recreation > GB Physical geography > GB5000 Natural disasters
G Geography. Anthropology. Recreation > GC Oceanography > GC205 Waves
Q Science > QE Geology > QE500 Dynamic and structural geology > QE521 Volcanoes and earthquakes
G Geography. Anthropology. Recreation > GC Oceanography > GC300 Tides
G Geography. Anthropology. Recreation > GC Oceanography > GC205 Waves
Q Science > QE Geology > QE500 Dynamic and structural geology > QE521 Volcanoes and earthquakes
G Geography. Anthropology. Recreation > GC Oceanography > GC300 Tides
Creators:
Crockett, R. G. M., Gillmore, G. K., Phillips, P. S. and Gilbertson, D. D.
Publisher:
Institute of Mathematics and its Applications (IMA)
Faculties, Divisions and Institutes:
Date:
2007
Date Type:
Publication
Title of Book:
Proceedings of the Second IMA International Conference on Flood Risk Assessment
Event Title:
Second Institute of Mathematics and its Applications (IMA) International Conference on Flood Risk Assessment
Event Dates:
4-5 September 2007
Place of Publication:
London
Event Location:
University of Plymouth
Event Type:
Conference
Language:
English
ISBN:
9780905091204
Status:
Published / Disseminated
Refereed:
No
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