Did the September 2010 (Darfield) earthquake trigger the February 2011 (Christchurch) event? Stramondo S.1*, Kyriakopoulos C.1, Bignami C.1, Chini M.1, Melini D.1, Moro M.1, Picchiani M.2, Saroli M.1,3, Boschi E.1 1
Istituto Nazionale di Geofisica e Vulcanologia, via di Vigna Murata 605, 00143 Rome,
Italy, (
[email protected]), Ph.: +39 06 51860521 2
University Tor Vergata, Dept. of Engineering, via del Politecnico, Rome, Italy
3
Dipartimento di Meccanica, Strutture, Ambiente e Territorio DiMSAT - Università di Cassino
*Correspondence and requests for materials should be addressed to Salvatore Stramondo (
[email protected])
Figure S1|: ALOS PALSAR interferograms of September 3rd, 2010, Darfield (left) and of February 21st, 2011, Christchurch earthquake. Each color cycle corresponds to a phase change of 2πradians,which correspond to 115 mm for PALSAR. Red stars indicate the epicenters of the September 3rd (left) and February 21st (right) earthquakes. Black lines show the faults traces.
Figure S2|: a) Sampled unwrapped interferogram of September 3rd, 2010, earthquake in LOS geometry. b) Modeled surface deformation from linear inversion of (a). c) Map of residuals.
Figure S3 (Top Panel) Resolution matrix. (Bottom Panel) Standard deviation (σ) associated with the fault slip. The uncertainties are generally very low (50cm) with depth.
Figure S4. Close caption of Earthquake-1’s fault planes. The red and black arrows indicate respectively the strike and dip directions of the faults.
Figure S5. A 3D perspective view for Earthquake-1 and Earthquake 2. The NE-SW direction view is selected in order to visualize the thrust fault planes that border the Greendale fault and its lateral extension.
