Kinematic Source Model of the 22 February 2011 Mw 6.2 Christchurch Earthquake Using Strong Motion Data

摘要: The Canterbury earthquake sequence began in September 2010 with the Mw 7.1 (source: GeoNet catalog, http://geonet.org.nz/canterbury-quakes/) Darfield that ruptured previously unknown 40-km-long Greendale fault 30 km west of Christchurch (Gledhill et al. 2011). Extreme ground accelerations as high 1.8 g near epicenter were recorded. event caused intense liquefaction eastern suburbs well closer to downtown, course Avon River. was followed by a major aftershock on 22 February local time (21 UTC) magnitude 6.2 GeoNet), but Me 6.7 USGS, http://earthquake.usgs.gov/earthquakes/eqinthenews/2011/usb0001igm/neic\_b0001igm\_e.php). This centred only few kilometers south city center. Extremely (as 2.2 g) also recorded (Kaiser, Benites In addition extreme seen after earthquake, this landslides, large rockfalls, widespread damage earthquake-risk buildings Christchurch, and, most tragically, about 180 casualties. Another 6.0 USGS), subsequently occurred 13 June (12 just event, causing further damage, and liquefaction. Following network (New Zealand National Hazard Monitoring Network) its regional component CanNet (Berrill 2011) supplemented deployment additional strong motion instruments regionally (and another nine following earthquake). We used dense constrain source kinematics event. present inversion scheme discuss limitations. These results are preliminary, since more thorough data processing is needed; however, they already provide key model will help understanding …