ALERT: Update 11 FT Tsunami Heading Toward Hawaii From Major 7.7 Canada Quake

A live Weather channel alert warns that a 7 foot Tsunami is heading directly toward Hawaii following a major 7.7 earthquake off the coast of Canada earlier.

Update: The Weather Channel now reports previous 7 foot Hawaii Tsunami warning has now been upgraded to up to 11 feet. The warnings have also been upgraded to up to to 7 feet extending along the California coast.

The Tsunami Alert was just issued live on the Weather Channel.

CNBC reporter Steve Kopack also just tweeted it.

Official tells @weatherchannel: Parts of Hawaii may see waves heights as much as 7 feet when first waves hit in nearly 2 hours.

— Steve Kopack (@SteveKopack) October 28, 2012

Tsunami travel times (via Puenta Sur):

A live news cast:

Hawaii News Now – KGMB and KHNL

The Intel Hub’s Sheppard Ambellas also just posted a video as he is in Hawaii and just evacuated.

From NOAA (US Government’s National Oceanic and Atmospheric Association):

ETA for first #tsunami wave in Hawaii is 10:28 HST Sat. Oct. 27. Read warning at 1.usa.gov/RcCadn

— NOAA (@NOAA) October 28, 2012

#NOAA‘s Pacific Tsunami Warning Center has issued #tsunami warning for Hawaii – 1.usa.gov/S4riiH

— NOAA (@NOAA) October 28, 2012

If you have friends or relatives in Hawaii please alert them. They can look up the Hawaii tsunami evacuation zones here.

There are also smaller advisories in effect for the US west coast and Canada west coast but the big Tsunami is headed toward Hawaii and officials are telling residents to evacuate the coast.

A quick summary of the information in this post.

A video of the Tsunami Warning sirens going off in Hawaii.

From NOAA:

The actual advisory text from NOAA:

000
WEHW40 PHEB 280514
TSUHWX
HIZ001>003-005>009-012>014-016>021-023>026-280714-
/O.NEW.PHEB.TS.W.0001.121028T0509Z-000000T0000Z/

BULLETIN
TSUNAMI MESSAGE NUMBER   3
NWS PACIFIC TSUNAMI WARNING CENTER EWA BEACH HI
709 PM HST SAT OCT 27 2012

TO - CIVIL DEFENSE IN THE STATE OF HAWAII

SUBJECT - TSUNAMI WARNING

A TSUNAMI WARNING IS ISSUED FOR THE STATE OF HAWAII EFFECTIVE AT 0709 PM HST. THIS UPGRADE IS DUE TO THE SEA LEVEL READINGS RECEIVED AND THE RESULTING CHANGE IN THE HAWAII TSUNAMI FORECAST.

AN EARTHQUAKE HAS OCCURRED WITH THESE PRELIMINARY PARAMETERS

   ORIGIN TIME - 0504 PM HST 27 OCT 2012
   COORDINATES - 52.8 NORTH  131.8 WEST
   LOCATION    - QUEEN CHARLOTTE ISLANDS REGION
   MAGNITUDE   - 7.7  MOMENT

MEASUREMENTS OR REPORTS OF TSUNAMI WAVE ACTIVITY

 GAUGE LOCATION        LAT   LON    TIME        AMPL         PER
 -------------------  ----- ------  -----  ---------------  -----
 DART 46404           45.9N 128.8W  0417Z   0.05M /  0.2FT  20MIN
 LANGARA POINT BC     54.2N 133.1W  0424Z   0.20M /  0.7FT  26MIN
 DART 46419           48.8N 129.6W  0346Z   0.06M /  0.2FT  12MIN

 LAT  - LATITUDE (N-NORTH, S-SOUTH)
 LON  - LONGITUDE (E-EAST, W-WEST)
 TIME - TIME OF THE MEASUREMENT (Z IS UTC IS GREENWICH TIME)
 AMPL - TSUNAMI AMPLITUDE MEASURED RELATIVE TO NORMAL SEA LEVEL.
        IT IS ...NOT... CREST-TO-TROUGH WAVE HEIGHT.
        VALUES ARE GIVEN IN BOTH METERS(M) AND FEET(FT).
 PER  - PERIOD OF TIME IN MINUTES(MIN) FROM ONE WAVE TO THE NEXT.

 NOTE - DART MEASUREMENTS ARE FROM THE DEEP OCEAN AND THEY
        ARE GENERALLY MUCH SMALLER THAN WOULD BE COASTAL
         MEASUREMENTS AT SIMILAR LOCATIONS.

EVALUATION

 A TSUNAMI HAS BEEN GENERATED THAT COULD CAUSE DAMAGE ALONG COASTLINES OF ALL ISLANDS IN THE STATE OF HAWAII. URGENT ACTION SHOULD BE TAKEN TO PROTECT LIVES AND PROPERTY.

 A TSUNAMI IS A SERIES OF LONG OCEAN WAVES. EACH INDIVIDUAL WAVE
 CREST CAN LAST 5 TO 15 MINUTES OR MORE AND EXTENSIVELY FLOOD
 COASTAL AREAS. THE DANGER CAN CONTINUE FOR MANY HOURS AFTER THE
 INITIAL WAVE AS SUBSEQUENT WAVES ARRIVE. TSUNAMI WAVE HEIGHTS
 CANNOT BE PREDICTED AND THE FIRST WAVE MAY NOT BE THE LARGEST.
 TSUNAMI WAVES EFFICIENTLY WRAP AROUND ISLANDS. ALL SHORES ARE AT
 RISK NO MATTER WHICH DIRECTION THEY FACE. THE TROUGH OF A TSUNAMI
 WAVE MAY TEMPORARILY EXPOSE THE SEAFLOOR BUT THE AREA WILL
 QUICKLY FLOOD AGAIN. EXTREMELY STRONG AND UNUSUAL NEARSHORE
 CURRENTS CAN ACCOMPANY A TSUNAMI. DEBRIS PICKED UP AND CARRIED
 BY A TSUNAMI AMPLIFIES ITS DESTRUCTIVE POWER. SIMULTANEOUS HIGH
 TIDES OR HIGH SURF CAN SIGNIFICANTLY INCREASE THE TSUNAMI HAZARD.

 THE ESTIMATED ARRIVAL TIME IN HAWAII OF THE FIRST TSUNAMI WAVE IS

                     1028 PM HST SAT 27 OCT 2012

MESSAGES WILL BE ISSUED HOURLY OR SOONER AS CONDITIONS WARRANT.

$$

From the USGS

From the USGS:

M7.7 – 139km S of Masset, Canada 2012-10-28 03:04:10 UTC
Summary

Location and Magnitude contributed by: USGS, NEIC, Golden, Colorado (and predecessors)

Event Time

1. 2012-10-28 03:04:10 UTC
2. 2012-10-27 20:04:10 UTC-07:00 at epicenter
3. 2012-10-27 23:04:10 UTC-04:00 system time

Location

52.769°N 131.927°W depth=17.5km (10.9mi)

Nearby Cities

1. 139km (86mi) S of Masset, Canada
2. 202km (126mi) SSW of Prince Rupert, Canada
3. 293km (182mi) SW of Terrace, Canada
4. 556km (345mi) NW of Campbell River, Canada
5. 635km (395mi) SSE of Juneau, Alaska

Related Links

• Additional earthquake information for Canada
• View location in Google Maps

Tectonic Summary

The October 28th, 2012 (October 27 at the location of the epicenter) M 7.7 earthquake south of Masset, Canada, occurred as a result of oblique-thrust faulting near the plate boundary between the Pacific and North America plates. At the location of this event, the Pacific plate moves approximately north-northwest with respect to the North America plate at a rate of approximately 50 mm/yr.

This earthquake is likely associated with relative motion across the Queen Charlotte fault system offshore of British Columbia, Canada. Studies of tectonics in this region suggest plate motions are taken up by strike slip faulting parallel to the plate boundary, accompanied by lesser amounts of thrust motion to accommodate the oblique nature of the plate motion vector between the two plates with respect to the orientation of the main plate boundary fault structure. This oblique component of plate motion may involve either underthrusting of the western edge of the Pacific Plate beneath North America, or be taken up on crustal faults within the North America plate. The October 28th earthquake is consistent with either scenario.

This region of the Pacific:North America plate boundary has hosted 7 earthquakes of magnitude 6 or greater over the past 40 years – the largest of which was a M 6.6 earthquake in 2009, 80 km to the south east of the 2012 earthquake. In 1949, a M 8.1 earthquake occurred closer to the Pacific:North America plate boundary, likely as a result of strike-slip faulting, approximately 100 km northwest of the October 28th earthquake, near the northern extent of Haida Gwaii region (formerly Queen Charlotte Islands).

Additional Data Contributors

• Alaska Earthquake Information Center
• Pacific Tsunami Warning Center
• Alaska Tsunami Warning Center

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