Powerful aftershock shakes the Christchurch area again

Lyttelton port in 2004.

The port of Lyttelton - Image via Wikipedia

Earthquake Report comment :
A powerful aftershock occurred at 11:32 am of Tuesday October 19.
The epicenter was located only 1 km from Lansdowne,  5 km south of Halswell and 10 km west of Lyttelton
The hypocenter was at a very shallow depth of 9 km.
This aftershock proves once more that the greater Christchurch area is till at risk for major aftershocks. Until now only 5+ magnitudes have been reached, but Magnitudes of +6 are certainly still possible. Such aftershocks can be very damaging at shallow depths.
Local media report that products tumbled from shelves and that many buildings have been evacuated after the shock.
Other reports mention bricks falling in the city.
The Lyttelton tunnel was closed after the quake but had since reopened. The port was operating as usual.
The quake scared people a lot, but fortunately no major damage or injuries were reported.
A specific phenomena of this aftershock was once again “liquefaction’ in some areas.
Read the full report of this aftershock in the local edition of  “the press” Christchurch

Most important Earthquake Data:
Magnitude : M 5.0
Tuesday, October 19 2010 at 11:32 am (local time)
Depth (Hypocenter) : 9 km
Geo-location(s) :
10 km west of Lyttelton
10 km south-west of Christchurch

Links to important maps
GNS Science Did You Feel It Map
Google satellite map of the area showing the kind of terrain the earthquake took place
GNS Science  Shaking map
USGS historic earthquakes map
Live Seismograph

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