Extended nucleation of the 1999 Mw 7.6 Izmit Earthquake

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<title>tended nucleation of the 1999 Mw 7.6 Izmit Earthquake</title>
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<name type="personal" xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="MAPA20110007218">
<namePart>Bouchon, Michel</namePart>
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<dateIssued encoding="marc">2011</dateIssued>
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<abstract displayLabel="Summary">Laboratory and theoretical studies suggest that earthquakes are preceded by a phase of developing slip instability in which the fault slips slowly before accelerating to dynamic rupture. We report here that one of the best-recorded large earthquakes to date, the 1999 moment magnitude (Mw) 7.6 Izmit (Turkey) earthquake, was preceded by a seismic signal of long duration that originated from the hypocenter. The signal consisted of a succession of repetitive seismic bursts, accelerating with time, and increased low-frequency seismic noise. These observations show that the earthquake was preceded for 44 minutes by a phase of slow slip occurring at the base of the brittle crust. This slip accelerated slowly initially, and then rapidly accelerated in the 2 minutes preceding the earthquake </abstract>
<note type="statement of responsibility">Michel Bouchon... [et al.]</note>
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<topic>Catástrofes naturales</topic>
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<topic>Predicciones</topic>
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<topic>Sismicidad</topic>
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<topic>Terremotos</topic>
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<geographic>Turquía</geographic>
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<title>Science</title>
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<text>18/03/2011; Vol. 331; p. 877-880</text>
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