Magnitude 7.0 - SOUTH ISLAND OF NEW ZEALAND
2010 September 03 16:35:46 UTC
- This event has been reviewed by a seismologist.
|Depth||5 km (3.1 miles) set by location program|
|Region||SOUTH ISLAND OF NEW ZEALAND|
|Distances||45 km (30 miles) W of Christchurch, New Zealand|
200 km (125 miles) SSE of Westport, New Zealand
290 km (180 miles) NNE of Dunedin, New Zealand
330 km (205 miles) SW of WELLINGTON, New Zealand
|Location Uncertainty||Error estimate not available|
|Parameters||NST=374, Nph=374, Dmin=88.7 km, Rmss=0 sec, Gp= 18°,|
M-type=centroid moment magnitude (Mw), Version=9
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Two people seriously injured, six bridges and many buildings damaged in the Christchurch area. About 30 km of right-lateral surface faulting with a maximum offset of more than 5 m was observed southeast of Darfield. Liquefaction caused damage at Bexley, Kaiapoi and in parts of Christchurch. Landslides were observed along the Rakaia River and the Port Hills area. Maximum intensity IX in the Christchurch-Greendale area and felt (VI) in much of Canterbury. Felt throughout New Zealand. Detailed information about this earthquake is available on the New Zealand GeoNet website.
The September 3, 2010 South Island, New Zealand earthquake occurred as a result of strike-slip faulting within the crust of the Pacific plate, near the eastern foothills of the Southern Alps at the western edge of the Canterbury Plains. The earthquake struck approximately 50 km to the west-northwest of Christchurch, the largest population center in the region, and about 80-90 km to the south and east of the current expression of the Australia:Pacific plate boundary through the island (the Alpine and Hope Faults). The earthquake, though removed from the plate boundary itself, likely reflects right-lateral motion on one of a number of regional faults related to the overall relative motion of these plates and may be related to the overall southern propagation of the Marlborough fault system in recent geologic time.
Today's earthquake occurred approximately 50 km to the southeast of a M7.1, surface-rupturing event in Authur's Pass, on March 9th, 1929, which caused 17 fatalities. More recently, two earthquakes of M6.7 and M5.9 occurred in June 1994 approximately 40 km to the northwest of today's event, but did not cause any known fatalities or significant damage.
Scientific & Technical Information
- USGS Centroid Moment Tensor Solution
- USGS Body-Wave Moment Tensor Solution
- Global CMT Project Moment Tensor Solution
- USGS WPhase Moment Tensor Solution
- Historic Moment Tensor Solutions
- Finite Fault Model
- Phase Data
- Theoretical P-Wave Travel Times
- Strong-motion records - Center for Engineering Strong Motion Data
- Energy and Broadband Solution
- Preliminary Earthquake Report
- U.S. Geological Survey, National Earthquake Information Center:
World Data Center for Seismology, Denver