Earthquakes shake floor off the coast

From Staff Reports
Friday, July 18, 2008 | 11 comment(s)

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Did you feel them?

Probably not.

The first one hit at 1:36 p.m. Thursday. It 258 miles due west of Florence, with a magnitude of 5.5. It wouldn’t be the last.

The next earthquake was slightly bigger, according to the West Coast/Alaska Tsunami Warning Center. It rattled the Pacific Ocean floor at 1:51 p.m. The epicenter was 261 miles offshore and due west of Coos Bay, with a magnitude of 5.6.

Neither earthquake generated a tsunami.

“In coastal areas of intense shaking, locally generated tsunamis can be triggered by underwater landslides,” the agency said in the quake notification.

For people on land to feel the rattling, a quake would have to be much larger — 7.1 to 7.5 — for a tsunami warning to be issued, the center’s earthquake scientists have said.

Three other quakes hit the same area and depth over the past two days. All occurred along the Juan de Fuca fault line, where the North American plate is sliding under the Juan de Fuca plate.
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Hmmn wrote on Jul 19, 2008 9:11 AM:

Angela, that is not the same siren that would go off if there were a tsunami. The only siren we have for that is located in a spot where very few people would ever be able to hear it. I wish I was kidding but I'm not. Like Linda said, most of us will be going for a big long swim when the big one comes.

Enrik wrote on Jul 18, 2008 10:23 PM:

The Juan de Fuca has always slide under the North American Plate irregardless of global warming.
As mentioned earlier on this, a very powerful 7.0 struck 195 miles NE of Tokyo.THAT is one powerful quake...
PS I'm glad to hear others points of views

Viorel wrote on Jul 18, 2008 9:32 PM:

Mr. Kenny D, this earthquake is not connected with global warming. It is connected with so called "Full Moon - Earthquake Theory". I just read a few minutes ago about an strong earthquake in Japan.

Angela W. wrote on Jul 18, 2008 6:42 PM:

To HMMN... I believe there is a warning that goes off every Wed. I know for a fact there is one that goes off in Bandon every week.

Edward wrote on Jul 18, 2008 4:49 PM:

I can't believe the negative nellies on these blogs haven't tried to stop plate tectonics in the bay area yet...

Kenny D wrote on Jul 18, 2008 4:45 PM:

To Enrik

Normally, you would be correct. But this global warming thing has fouled that up too.

Linda wrote on Jul 18, 2008 4:43 PM:

To Hmmmmmmm. We have a siren, but not everyone can hear it. So what's the point, the point is we'll all get to go swimming together!

Hmmn wrote on Jul 18, 2008 4:03 PM:

Isn't it lovely that we have $1000 garbage cans, a soon to be defunct 20 Million airport, and yet - NO FREAKING SIRENS to warn us of a tsunami if there was one coming!!

Boy do we have some mixed up priorities!

Holly wrote on Jul 18, 2008 3:26 PM:

Enrik, you are correct! What else doesn't this publication know? Everybody knows that continental crust is lighter than oceanic crust . . .duh!!!

Kenny D. wrote on Jul 18, 2008 12:51 PM:

I'm sure this is connected somehow with global warming.

Enrik wrote on Jul 18, 2008 12:38 PM:

It's the other way around, the Juan De fuca slides under the North American plate


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