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Posted on 06/26/2006 7:59:10 PM PDT by null and void
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You are here:Home » Earthquake Center » Latest Earthquakes - World » Magnitude 7.1 - RAT ISLANDS, ALEUTIAN ISLANDS, ALASKA
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| Magnitude | 7.1 (Major) | |
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| Date-Time |
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| Location |
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51.776°N, 175.599°E |
| Depth | 15 km (9.3 miles) set by location program | |
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| Region | RAT ISLANDS, ALEUTIAN ISLANDS, ALASKA | |
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| Location Uncertainty | Error estimate not available |
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| Parameters | Nph=085, Dmin=0 km, Rmss=0 sec, Gp= 0, M-type=local magnitude (ML), Version=0 |
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| Source |
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| Event ID | ak00064976 |
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Geophysical Institute, University of Alaska Fairbanks
| AccessibilityFOIAPrivacyPolicies and Notices | |
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URL: http://earthquake.usgs.gov/eqcenter/recenteqsww/Quakes/ak00064976.php |
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Thanks.
I'm looking for the ones that make up Rat Island.
They may be unnamed, or the page at the Alaskan Volcano Observatory may not mention the island name, just the Volcano name.
Any Rogue Waves in the Bering Sea have nothing to do with seismicity.
Actually the Rogue Wave capital of the world is the strait between South Africa and Madagascar.
It's just that the Rat Islands have enough seismic monitoring to pick up everything (and the USGS site shows smaller quakes within the US than elsewhere in the world) but not quite enough to get a really accurate quick magnitude.
What you saw was an automated computer program coming up with the 7.1, which was in error; after a human reviewed it it was dropped to 6.0.
The Rat Islands aren't in one of the seismic "gaps" within the Aleutians that are likely to generate a magnitude 8-9 quake in the near future; there was one posited further East (The Shumagin Gap) but some new evidence suggests that area just doesn't slip in big earthquakes. There's the "Commander Gap" at the extreme west end of the Aleutians where such a large quake may be possible.
So far: Shemya and Adak islands are nearby.
***I don't think any tsunami will make it to Tennessee...***
Many of us between the coast and Tennessee certainly hope you are right....
The interesting thing is that of the dozens of volcanoes on Sumatra, the number that have actually erupted since the 2004 earthquake...
Is precisely zero.
The only currently active volcanoes in Alaska are Augustine and Veniaminof, which are something like a thousand miles from this quake.
The quake was somewhat near Buldir Island, which contains East Cape Volcano as well as Buldir volcano. Neither has erupted in recorded history and likely haven't erupted for thousands of years. The area has seen quakes 30,000 times more powerful than this one without either volcano erupting,so I wouldn't hold my breath waiting for them to erupt.
The closest volcano to the epicenter of this quake is the Kiska Volcano.
Local Date: Monday June 26th, 2006 Local Time: 06:39 PM AKDT Universal Time: 06/27/2006 02:39:29.789 UTC
Magnitude: 7.10 ML
Latitude: 51.7757 Longitude: 175.5987
Depth: 9 miles (15 km)
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9 miles is pretty shallow, but alternate solutions give as shallow as 3 miles. However the Tsunami Warning Center says:
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To: Tsunami warning system participants in the U.S. West Coast States, Alaska, and British Columbia
From: NOAA/NWS/West Coast-Alaska Tsunami Warning Center
(Experimental Web Product) Subject: Tsunami Information Statement #1
issued 06/26/2006 at 6:44PM AKDT
A strong earthquake has occurred, but a tsunami IS NOT expected along the California, Oregon, Washington, British Columbia, or Alaska coast. NO tsunami warning or watch is in effect for these areas. Based on the earthquake magnitude and historic tsunami information, a damaging tsunami IS NOT expected along the California, Oregon, Washington, British Columbia, and Alaska coasts. Some of these areas may experience non-damaging sea level changes. At coastal locations which have experienced strong ground shaking, local tsunamis are possible due to underwater landslides.
At 6:40 PM Alaskan Daylight Time on June 26, an earthquake with preliminary magnitude 6.5 occurred 25 miles south of Buldir I., Alaska. ------
Mt. Adagdak volcano and Mt. Moffett on the north end of Adak island.
And, unsurprisingly, no images of Shemya or the volcanoes there show up on AVO.
http://www.avo.alaska.edu/search_results.php?search=Shemya
http://www.avo.alaska.edu/search_results.php?search=Rat+Island
http://www.avo.alaska.edu/search_results.php?search=Adak
Akutan shows up as being in the Rat Islands as well.
So, quakes are likely of crustal plate movement instead of volcanic activity as was near the Davidson Seamount awhile back.
I wouldn't remotely expect a noticeable tsunami from this at all.
Even if it had been 7.1, and we now know it's a fairly routine in the area 6.0, I wouldn't have exactly been sitting around with bated breath waiting for a tsunami.
People are sort of over-anxious for the next big tsunami...
With some exceptions I wouldn't even begin thinking about a teletsunami (one that does damage at a distance) below 8 and wouldn't consider one more likely than not below M 8.5.
And the overwhelming majority of underwater quakes in the M (Moment Magnitude) 7-7.5 range don't even generate a damaging local tsunami.
Keep in mind if you read old articles and such the magnitudes of some past tsunamigenic quakes were not given in Moment magnitude.
The Kiska Volcano is only 60 miles W. of the epicenter.
Here are more stats from Alaska's Information Center:
90 miles (145 km) SE of Shemya Is
1454 miles (2327 km) W of Anchorage
1571 miles (2513 km) W of Valdez
1583 miles (2533 km) WSW of Fairbanks
1992 miles (3187 km) W of Juneau
Don't need to tell you BD but 6.0 's have been rather common the last few weeks think this must be the 5th or so.
If we get a 7.9 I will have to head for dryer ground.
Still awesome stuff.
Rats with King Crabs. (kidding)
Thanks for the link
What absulutely beautiful pics.
More so is you love geological formations.
Thanks for the link
What absulutely beautiful pics.
More so is you love geological formations.
Living in the ZONE it is nice to have the emerg NOOA Radio set and on for any Tsunami events.
They do a test every Wends morning around 11 am and if that Son of a Gun does not make us jump when it goes off.
Perhaps I could turn down the volume but loud is good for alerting if the real thing starts a yelping warnings.
Thanks for the ping.
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