7.0 quake off Honshu, Japan – no Tsunami Warning

From USGS

Legend with age and magnitude scale

The Pacific Tsunami Warning Center issued a statement, but no warning:

WEPA42 PHEB 100104

TIBPAC

TSUNAMI BULLETIN NUMBER 001

PACIFIC TSUNAMI WARNING CENTER/NOAA/NWS

ISSUED AT 0104Z 10 JUL 2011

THIS BULLETIN APPLIES TO AREAS WITHIN AND BORDERING THE PACIFIC

OCEAN AND ADJACENT SEAS...EXCEPT ALASKA...BRITISH COLUMBIA...

WASHINGTON...OREGON AND CALIFORNIA.

... TSUNAMI INFORMATION BULLETIN ...

THIS BULLETIN IS FOR INFORMATION ONLY.

THIS BULLETIN IS ISSUED AS ADVICE TO GOVERNMENT AGENCIES.  ONLY

NATIONAL AND LOCAL GOVERNMENT AGENCIES HAVE THE AUTHORITY TO MAKE

DECISIONS REGARDING THE OFFICIAL STATE OF ALERT IN THEIR AREA AND

ANY ACTIONS TO BE TAKEN IN RESPONSE.

AN EARTHQUAKE HAS OCCURRED WITH THESE PRELIMINARY PARAMETERS

REPORTED BY THE JAPAN METEOROLOGICAL AGENCY.

 ORIGIN TIME -  0057Z 10 JUL 2011

 COORDINATES -  38.0 NORTH  143.5 EAST

 DEPTH       -   10 KM

 LOCATION    -  OFF EAST COAST OF HONSHU  JAPAN

 MAGNITUDE   -  7.1

EVALUATION

 NO DESTRUCTIVE WIDESPREAD TSUNAMI THREAT EXISTS BASED ON

 HISTORICAL EARTHQUAKE AND TSUNAMI DATA.

 HOWEVER - EARTHQUAKES OF THIS SIZE SOMETIMES GENERATE LOCAL

 TSUNAMIS THAT CAN BE DESTRUCTIVE ALONG COASTS LOCATED WITHIN

 A HUNDRED KILOMETERS OF THE EARTHQUAKE EPICENTER. AUTHORITIES

 IN THE REGION OF THE EPICENTER SHOULD BE AWARE OF THIS

 POSSIBILITY AND TAKE APPROPRIATE ACTION.

THIS WILL BE THE ONLY BULLETIN ISSUED FOR THIS EVENT UNLESS

ADDITIONAL INFORMATION BECOMES AVAILABLE.

THE JAPAN METEOROLOGICAL AGENCY MAY ALSO ISSUE TSUNAMI MESSAGES

FOR THIS EVENT TO COUNTRIES IN THE NORTHWEST PACIFIC AND SOUTH

CHINA SEA REGION.  IN CASE OF CONFLICTING INFORMATION... THE

MORE CONSERVATIVE INFORMATION SHOULD BE USED FOR SAFETY.

THE WEST COAST/ALASKA TSUNAMI WARNING CENTER WILL ISSUE PRODUCTS

FOR ALASKA...BRITISH COLUMBIA...WASHINGTON...OREGON...CALIFORNIA.
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21 thoughts on “7.0 quake off Honshu, Japan – no Tsunami Warning

  1. NOAA has an underwater microphone off the Aleutian Islands. This is what it recorded of the 9.0, March 11 earthquake.

  2. Amino Acids in Meteorites says: July 9, 2011 at 9:57 pm
    “NOAA has an underwater microphone off the Aleutian Islands.”
    I didn’t know such a measurement had been done. Thanks.
    That reminds me of the terrible minutes in the afternoon of March 11.
    On June 23 the total damage was estimated tentatively to be more than $200 billion.

  3. Aftershocks of 3.11. . . may be? . . .
    A symptom of spinning in ‘space’ . . . may be?

  4. tokyoboy says:
    July 9, 2011 at 10:17 pm
    I didn’t know such a measurement had been done.
    I didn’t either. I cam across it tonight as I was searching for any videos of today’s quake. It looked interesting, worth posting.

  5. Felt it here in Koriyama, Fukushima… I was wary that it might build up, similar to what the 3/11 one did, but luckilly it didn’t.
    There /was/ a tsunami advisory, and there was in fact about a 10cm tsunami measured.
    Regards
    Kevin.

  6. The Pacific Tsunami Warning Center should never be apologetic if a tsunami doesn’t happen. I want to know if a large earthquake has happened. If a computer makes the decision to notify countries that might be affected by a tsunami, that’s just great.

  7. The Seismic Monitor page visually illustrates the activity around the Pacific Rim.
    http://www.iris.edu/seismon/bigmap/index.phtml
    Makes one realise how puny is the human tenacy on this planet. We apparently just made it through a genetic bottleneck and it is on the cards there is probably an asteroid with our name on it.
    http://en.wikipedia.org/wiki/Toba_catastrophe_theory
    When we are gone, the Earth will continue to spin on its axis, in its orbit around the Sun for another 5 billion years until the Sun evolves into a red giant and swallows up Mercury, Venus and Earth. The planet doesn’t need saving. It will do just fine when humanity has run its natural biological course and bogged off into extinction
    Man Made Global Warming? Baa Humbug. Warmer, colder, warmer colder, natural cycles!

  8. I felt it this morning at around 10am Tokyo time. I was sitting in my office in Shinjuku and everything started to shake a bit. No big deal compared to 3.11… but hopefully this is the “big” aftershock that they’ve been predicting would occur for some time now. A lot of flyjins left the city and haven’t returned because they are afraid Tokyo could get a direct hit by a large (7+) aftershock.

  9. There are underwater microphones all over the sea bed. These were to listen for Russian subs. but can also be used for other purposes

  10. Jaymam,
    . . . . Computers are programs, and don’t make decisions (yet) . . . secondly, accuracy is very important so that there is not a waste of time, money, resources . . . running to and from “possible” disasters . . . I see (forecast) that there will come a day when the big, giant, flabbergasting story of the ‘day’ will be the Weatherman ( or Scientists) were . . . . Ohhhh No! Wrong!
    . . . . as opposed to AGW . . . in which they were just plain dishonest! . . . . In my honest opinion!

  11. John Marshall: Years ago I read in The NYT that listening devices were going to be used to prove once and for all if global warming was happening. They were going to make a loud sound in California and time how long it took to get to Japan. The experiment was delayed because environmentalist thought it would harm marine animals. The last I heard though was that they were going ahead with it. I never heard anything more about it. I’m wondering if anyone know about that experiment, if it took place and the results if it did.

  12. Can all of this activity on one side of the pacific plate continue without a correspondeing shift on the other side of the Plate?

  13. @Gorgias
    You can never say never, but nothing happening around Japan is likely to affect the American side of the Pacific. The plate motions off Tohoku are completely different from those around the North American west coast.
    And greetings to all the other readers in Japan. I’m in northern Yamagata. Snow country.

  14. Hector Pascal says: July 10, 2011 at 7:23 pm
    “….And greetings to all the other readers in Japan. I’m in northern Yamagata.”
    Hi Hector. So you now enjoy delicious cherry.
    For three weeks already, Yamagata cherry (Satoh-Nishiki) is also on my breakfast table.

  15. @tokyoboy
    Cherries, yes. I live just north of Sakurambo Higashine, we pick our own. Obanazawa watermelons are next, then we are into stone fruit season. Peaches and nectarines.. We are blessed with nature’s bounty here: fertile soil, abundant sun and water, snowcapped mountains and crystal clear rivers. The price we pay is earthquakes and volcanos.

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