CDEM Tsunami Warning 10 - Wave Size Increasing 28 Feb 2010
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National Warning: Tsunami Threat to New
Zealand
Update: Tsunami confirmed
________________________________________
No:
10
________________________________________
Issued
at 08:40 hours on 28 February 2010.
Issued by the Ministry of Civil Defence & Emergency Management (MCDEM).
A tsunami warning is in effect for New
Zealand:
The tsunami warning will remain in effect
until a cancellation message is issued by
MCDEM.
________________________________________
An
earthquake has occurred with these parameters:
Origin
time: 0634Z 27 FEB 2010
NZ time: 1934 NZDT 27 FEB
2010
Co-ordinates: 36.1 SOUTH 72.6 WEST
Depth: 55
KM
Location: NEAR COAST OF CENTRAL
CHILE
Magnitude: 8.8
The above magnitude is
provisional and may be increased or decreased as more
seismic data becomes available.
________________________________________
Summary:
As at 0840 NZDT, 28 February 2010 wave activity is now approximately 0.5 metres at the Chatham Islands, and 0.1 metres at East Cape. It is important to note that this is the first arrival and larger waves may follow over a period of several hours. The situation continues to be closely monitored.
The Pacific Tsunami Warning Centre (PTWC) has issued a Tsunami Warning in response to the above earthquake.
Only messages issued by MCDEM represent the official warning status for New Zealand. Local civil defence authorities may supplement these messages by applying local threat assessments.
Confirmation has been received that a tsunami was generated. A wave measuring 2.34 metres was measured at Talcahuano, Chile and 0.35 metres at Easter Island, Chile, and at this stage, 0.5 metres in the Chatham Islands, and 0.1 metres at East Cape.
Based on preliminary modelling and comparison with historical events the interpretation of the Tsunami Experts Panel is that a marine threat (i.e. threat to beach and small boats corresponding to wave heights less than 1 metre) exists for the entire east coasts of the North and South Island from Puysegur around to Cape Reinga and extending south to Ahipara. Some land threat also exists for the Chatham Islands and Banks Peninsula i.e. wave heights between 1 and 3 metres. There may be some small observable sea level changes on parts of the west coast of both islands.
Wave heights refer to maximum water level relative to the normal sea level at the beach. This does not take tides into account. Based on historical events it is expected that the greatest wave heights couldl occur between 6 and 12 hours after the initial arrivals.
People in coastal areas should:
1. Stay off beaches
2. Stay out
of the water (sea, rivers and estuaries, including boating
activities)
3. Do not go sightseeing
4. Share this
information with family, neighbours and friends
5. Listen
to the radio and/or TV for updates
6. Follow instructions
of your local Civil Defence authorities.
MCDEM and scientific advisors are closely monitoring the situation to determine the severity of the threat to New Zealand.
This
warning has been issued to all local civil defence
authorities, emergency services, other agencies and
media.
________________________________________
Information
for emergency managers:
Estimates of
expected wave arrival times are as follows:
Note:
These times are provisional and based on the best
information available. Arrival times may be as much as one
hour later and may be adjusted in subsequent
messages.
Location Estimated Wave Arrival Time
- Updated
Chatham Islands-Kaingaroa 0752 NZDT 28
February 2010 - arrived
Chatham Islands-Waitangi 0735
NZDT 28 February 2010 - arrived - height 0.5m
North
Cape 0920 NZDT 28 February 2010
Whangarei 0945 NZDT 28
February 2010
Auckland (North Head) 1052 NZDT 28 February
2010
Mt Maunganui 0904 NZDT 28 February 2010
East Cape
0824 NZDT 28 February 2010 - arrived - height
0.1m
Gisborne 0829 NZDT 28 February 2010
New
Plymouth 1126 NZDT 28 February 2010
Napier 0853 NZDT 28
February 2010
Wanganui 1020 NZDT 28 February
2010
Wellington 0855 NZDT 28 February
2010
Nelson 1035 NZDT 28 February 2010
Marlborough
Sounds (Tory Channel) 0908 NZDT 28 February 2010
Westport
1038 NZDT 28 February 2010
Greymouth 1020 NZDT 28
February 2010
Christchurch (New Brighton) 0935 NZDT 28
February 2010
Timaru 0910 NZDT 28 February
2010
Milford Sound 0935 NZDT 28 February
2010
Dunedin 0900 NZDT 28 February 2010
Bluff 0928
NZDT 28 February 2010
Stewart Island 0951 NZDT 28
February 2010
Local civil defence emergency management is advised to:
1. Activate appropriate response
arrangements
2. Alert potentially at-risk communities as
appropriate
3. Stand by for further information
4.
Inform the NCMC of actions taken.
Local emergency services should act in coordination with local Civil Defence Emergency Management.
MCDEM has activated the Memorandum
of Understanding (MoU) with public broadcasters to broadcast
this
warning.
________________________________________
NCMC
status:
The National Crisis Management Centre (NCMC) is activated.
General enquiries (04) 494 6900
Media
enquiries (04) 494 6951
Email [email protected]
Satellite
phone 00881 621 465 606
HF radio call
sign ZKC21
Useful websites:
http://www.civildefence.govt.nz/
http://www.getthru.govt.nz/
________________________________________
Further
updates:
A further update with more information
will follow within the next hour. Until a cancellation is
issued updates will continue at least hourly. All further
updates will be communicated by MCDEM via the national
warning
system.
________________________________________
Issued
by:
Message authorised by the National
Controller, Civil Defence Emergency Management.
________________________________________
End of
Message
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