TY  - JOUR
PY  - 2011//
TI  - Extended nucleation of the 1999 Mw 7.6 Izmit earthquake
JO  - Science
A1  - Bouchon, Michel
A1  - Karabulut, Hayrullah
A1  - Aktar, Mustafa
A1  - Ozalaybey, Serdar
A1  - Schmittbuhl, Jean
A1  - Bouin, Marie-Paule
SP  - 877
EP  - 880
VL  - 331
IS  - 6019
N2  - 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 (M(w)) 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.<p />  <p>Language: en</p>
LA  - en
SN  - 0036-8075
UR  - http://dx.doi.org/10.1126/science.1197341
ID  - ref1
ER  -