Moderate seaquake south of New Zealand South Island

Milford Sound, Fjordland National Park

Fjordland National Park - Image by smileywhiley05 via Flickr

Earthquake Report comment :
USGS has published a seaquake to the south of Fjordland National Park.
This is one of the first reports we are publishing in this area, although it is a known fault line with linked earthquakes.
What makes this new earthquake (seaquake) even more special is that GNS Science did not report about this tremor.
At earthquake-report.com we do not always understand the publishing policy of governmental organizations. The Christchurch aftershock of M 4.8 was not published by USGS although they publish lesser quakes in the rest of the world. Same goes for GNS Science who is publishing Magnitudes of only 2, but did not published this one.
Some published quakes are sometimes hoaxes, but this tremor can be noticed very well on the seismograph drum installed in Southland

Most important Earthquake Data:
Magnitude : Mb 4.7
Sunday, October 24, 2010 at 07:20:26 PM at epicenter
Depth (Hypocenter) : 35 km
Geo-location(s) :
235 km (145 miles) WSW of Invercargill, New Zealand
345 km (215 miles) SW of Queenstown, New Zealand
390 km (245 miles) N of Auckland Island, New Zealand
Send a “felt” report

Links to important maps
USGS Did You Feel It Map
Google satellite map of the area showing the kind of terrain the earthquake took place
USGS historic earthquakes map
Live seismograph station Wether Hill Road, Southland, New Zealand

QuakeSOS has been developed to help actively people who are caught in an earthquake + delivers "Earthquake Report" information on your iPhoneQuakeSOS is a FREE iPhone application developed by Armand Vervaeck, the creator and main contributor to Earthquake Report. The Application simplifies immediate group communication to friends and family members (with your exact GPS location) and is constantly feeding the users with “Earthquake Report” news. Together with your own family and friends, QuakeSOS will be your closest earthquake friend.

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Christchurch Earthquake Damage Map with ‘damage and testimonies’

Earthquake-Report.com is always in for “added value” articles from local publishers.
We came across a fantastic initiative from “The Press – Stuff.co.nzwho had the idea of bundling testimonies from people living in the earthquake area on a google map. With colored buttons viewers can click on each of the buttons and read the story behind the button.

Most damage seem to have occurred in the old city center of Christchurch, although other parts of the area were also hurt.

If you click on the map, you are linked to the big interactive earthquake map from the publisher.
Congratulations from Earthquake-Report.com for this great initiative.

Improved New Zealand tsunami monitoring system in place

The likely impact of tsunami on New Zealand’s coastline is now better understood following the completion of a major project to install sea level monitoring devices.

Sea level gauges have been installed at 17 sites around New Zealand and offshore islands. Pressure sensors at the gauges measure any significant change in the sea level, with data being transmitted in real time to GNS Science’s GeoNet data management centre.

GNS Science assesses the data and advises the Ministry of Civil Defence and Emergency Management (MCDEM) about the level of threat posed by tsunami. MCDEM is responsible for managing the response to any threat, which may include issuing public warnings.

The tsunami network project, led by Land Information New Zealand (LINZ), now forms an important component of a wider tsunami monitoring system for New Zealand and across the Pacific.

Graeme Blick, Chief Geodesist at LINZ, said the project was initiated following the devastating Boxing Day 2004 tsunami in the Indian Ocean, caused by a 9.3 magnitude earthquake off the coast of Sumatra. Waves up to 1 metre in height were recorded at sites around New Zealand 18 to 25 hours after the earthquake occurred, highlighting New Zealand’s vulnerability to tsunami.

Mr Blick said the installation took five years to complete, and was made more challenging by the rough and rugged environment in which the sea level gauges were installed, and the long process of obtaining approvals and consents. The last sensor was installed in July 2010.

Agencies involved included GNS Science, MCDEM, NIWA, MORST, Waikato University and consultancy firm URS, as well as Australian agencies involved in the development of a similar network there.

“The fact the network was completed on time and within budget is testament to the cooperative effort that went in to the project,” Mr Blick said.

GNS Science worked closely with LINZ, providing technical expertise throughout the installation phase. Dr Ken Gledhill, Geohazards Monitoring Manager for GNS Science, said the project was a great example of collaboration across the public and private sectors.

Over the past 150 years, New Zealand has experienced about 10 tsunami higher than 5 metres, which can put people and property at risk. Large earthquakes can have devastating effects, both on land and water, Dr Gledhill said, as the people of Christchurch can testify.

“Since installation of the network began in 2005, several large regional and distant earthquakes have generated tsunami,” he said. “The network has successfully detected these, including the 2009 Samoan and 2010 Chilean earthquakes and the resulting waves that hit our coastline.” (Source : GNS Science)

Picture “Sourced from LINZ. Crown Copyright reserved.”

Huge Tsunami preparedness exercise in New Zealand today

tsunami sign

Image by bookish in north park via Flickr

On the exception of Canterbury, because of the recent traumatic earthquake,  New Zealand’s will test it’s ability to respond to a massive tsunami on Wednesday.

More than 100 agencies nationwide will take part in the exercise.
New Zealand will test the new updated national tsunami advisory and warning plan.

The revised plan makes use of new scientific modeling from GNS Science that allows for distinct threat warnings to be issued for 43 coastal zones.

“It is a good example of how science can help response to an emergency,” he added.

Exercise Tangaroa, named for the god of the sea, rivers, lakes and all life within them, will begin with a simulated Pacific Tsunami Warning Center alert that a major tsunami may have been created by an earthquake off the coast of South America.

National warnings, clearly labeled as simulation messages, will be issued by the Ministry of Civil Defense and Emergency Management to the National Crisis Management Center and agencies throughout the country.

Participants include all 16 regional civil defense emergency management groups, most local authorities, central government departments, emergency services, scientific agencies, welfare organizations, utilities, the transport sector and some media.

Read more here

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

QuakeSOS has been developed to help actively people who are caught in an earthquake + delivers "Earthquake Report" information on your iPhoneQuakeSOS is a FREE iPhone application developed by Armand Vervaeck, the creator and main contributor to Earthquake Report. The Application simplifies immediate group communication to friends and family members (with your exact GPS location) and is constantly feeding the users with “Earthquake Report” news. Together with your own family and friends, QuakeSOS will be your closest earthquake friend.

Strong aftershock shakes Christchurch, New Zealand

Akaroa, New Zealand

Akaroa peninsula - Image via Wikipedia

Earthquake Report comment :
The aftershock had a Magnitude of 5.2 following USGS and 5.0 following GNS Science.
Epicenter was at 30 km east of Darfield and near the original epicenter of the massive 7.1 earthquake who struck the area at September 4. Since that data many hunderds of aftershocks have rattled the greater Christchurch area (more than 1,000 if we count also the very small ones).
Very near the Akaroa peninsula.
Today’s aftershock was among the most powerful so far.
1640 people reported so far that they had felt the earthquake.
Most of them experienced a Modified Marcalli of IV (moderate shaking).
166 experienced a strong shaking (Mercalli V).
Today’s aftershock was the strongest since 4 weeks. These aftershocks can go on for many more months. So far, no damage or injuries have been reported.

Most important Earthquake Data:
Magnitude : 5.2 USGS
Monday, October 04, 2010 at 10:21:50 PM (22:21) at epicenter
Depth (Hypocenter) : 9.8 km
Geo-location(s) :
20 km (10 miles) W of Christchurch, New Zealand
30 km east of Darfield

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
USGS Shaking map
USGS historic earthquakes map
Geonet LIVE seismograph recording of this earthquake (valid for another 20 hours after publication of this article)

QuakeSOS has been developed to help actively people who are caught in an earthquake + delivers "Earthquake Report" information on your iPhoneQuakeSOS is a FREE iPhone application developed by Armand Vervaeck, the creator and main contributor to Earthquake Report. The Application simplifies immediate group communication to friends and family members (with your exact GPS location) and is constantly feeding the users with “Earthquake Report” news. Together with your own family and friends, QuakeSOS will be your closest earthquake friend.

Heavy but deep seaquake hits the North Island of New Zealand

One of Two Pictures of Me in New Zealand

Image by anthonylibrarian via Flickr

Earthquake Report comment :
A very heavy but luckily deep earthquake has struck the coastal waters of the North Island of New Zealand.
The hypocenter was located at a depth of  280 km.
The impact of this earthquake was very limited but due to the depth and the strong Magnitude, is was felt almost all over the North and South Island.
The epicenter was located at 85 km from White Island, a very active seismic and volcanic area. Auckland is at a distance of 230 km.
USGS has published this earthquake with a Magnitude of  5.4 … and a depth of 300 km.
1617 people reported the shaking. The perception of more than 1200 people was a Mercalli IV shaking (light shaking)

Most important Earthquake Data:
Magnitude : M 6.4
Wednesday, September 29 2010 at 5:14 pm at epicenter
Depth (Hypocenter) : 280 km
Geo-location(s) :
90 km north of White Island
150 km north of Whakatane
230 km east of Auckland

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
Nearest live seismograph map at Kokohu (Hawke’s Bay) station

QuakeSOS has been developed to help actively people who are caught in an earthquake + delivers "Earthquake Report" information on your iPhoneQuakeSOS is a FREE iPhone application developed by Armand Vervaeck, the creator and main contributor to Earthquake Report. The Application simplifies immediate group communication to friends and family members (with your exact GPS location) and is constantly feeding the users with “Earthquake Report” news. Together with your own family and friends, QuakeSOS will be your closest earthquake friend.

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