Ocean-bottom seismograph observations on the Mid-Atlantic Ridge near 45 N

Autor:	T. J. G. Francis, I. T. Porter, R. C. Lilwall
Rok vydání:	1977
Předmět:	Seismometer education.field_of_study geography geography.geographical_feature_category Population Mid-Atlantic Ridge Ocean bottom seismograph Induced seismicity Geophysics Geochemistry and Petrology Ridge Caldera education Aftershock Seismology Geology
Zdroj:	Geophysical Journal International. 51:357-370
ISSN:	1365-246X 0956-540X
DOI:	10.1111/j.1365-246x.1977.tb06923.x
Popis:	Summary. This paper describes the results obtained from the deployment of an array of ocean-bottom seismographs on the Mid-Atlantic Ridge near 45° N. Seismicity is restricted to a zone only 5 km wide near the centre of the Median Valley. The large scatter of epicentres determined using teleseismic data can be reconciled with this zone. The observed activity includes aftershock and swarm-like sequences but in terms of b value these, and teleseismically observed events, belong to the same population. The results are in agreement with a caldera collapse model of the Median Valley with movement restricted to the innermost faults.
Databáze:	OpenAIRE
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