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Saturday, June 17, 2006 9:30 am PDT (1730 UTC)
MOUNT ST. HELENS UPDATE
Current status is Volcano Advisory (Alert Level 2); aviation color code ORANGE: Growth of the new lava dome inside the crater of Mount St. Helens continues, accompanied by low rates of seismicity, low emissions of steam and volcanic gases, and minor production of ash. During such eruptions, changes in the level of activity can occur over days to months. The eruption could intensify suddenly or with little warning and produce explosions that cause hazardous conditions within several miles of the crater and farther downwind. Small lahars could suddenly descend the Toutle River if triggered by heavy rain or by interaction of hot rocks with snow and ice. These lahars pose a negligible hazard below the Sediment Retention Structure (SRS) but could pose a hazard along the river channel upstream.
Source
Hello-
Many or all of the recent Rat Island earthquakes are aftershocks to the M6.4 event which occurred June 13. That quake might have also triggered an earthquake "swarm" or cluster event, possibly triggered by magma movement or accelerated fault creep. Swarms are typically low-magnitude, and occur world-wide. In the U.S. there have been recent magma-induced swarms at depth within the Long Valley and Yellowstone calderas and beneath the Three Sisters volcanic center. Most swarms don't make the news.
Here is some information on the Rat Island earthquakes and earthquake clustering:
www.aeic.alaska.edu...
www.brightsurf.com...
www.google.com...
pasadena.wr.usgs.gov...
vulcan.wr.usgs.gov...
The Rat Island activity is not related to any activity in California, except they both occur on boundaries of the same plates. They are thousands of miles apart - too far for their small magnitudes.
There are no more earthquakes now than in past human history. When I was young we wouldn't have even known that they were occurring. With the Internet and advanced satellite communications, we can monitor more of the earth at increasingly sensitive levels, to it only appears that the number of earthquakes are increasing.
Tsunami warnings are triggered by very large earthquakes (usually M7.0 or higher) which occur under the ocean surface. For other tsunami information, go to: wcatwc.arh.noaa.gov...
We don't issue short-notice warnings of impending earthquakes. We do however give statistical predictions, such as what the chance is of a large event striking the Bay Area within the next 30 years.
You should find some interesting information at the aforementioned links. Best wishes.
Greg Durocher
USGS Earth Science Information Center - Alaska
alaska.usgs.gov...
Originally posted by Ptolomeo
Are you taking note of all the quakes taking place on Earth since the "aftershocks"?
Have you find a pattern or a clue? Is it following a Fault line?
I am sure there must be "something", somewhere, to - at least - get an idea of what is taking place...
Have you tried to draw a line on a world map to join the locations where quakes are taking place? Just so check if they continue happening on the same lines or areas...
If they follow any order...
Who knows?
MAP 2.6 2006/06/19 11:03:22 51.191 -177.564 1.0 ANDREANOF ISLANDS, ALEUTIAN IS., ALASKA
MAP 3.7 2006/06/19 05:03:45 52.041 177.259 15.0 RAT ISLANDS, ALEUTIAN ISLANDS, ALASKA
MAP 2.7 2006/06/19 04:32:03 53.999 -164.787 50.0 UNIMAK ISLAND REGION, ALASKA
MAP 4.3 2006/06/19 03:05:19 60.170 -152.837 122.2 SOUTHERN ALASKA
MAP 3.7 2006/06/18 20:53:43 52.108 177.099 14.4 RAT ISLANDS, ALEUTIAN ISLANDS, ALASKA
MAP 4.2 2006/06/18 20:30:38 51.758 176.996 5.1 RAT ISLANDS, ALEUTIAN ISLANDS, ALASKA
MAP 4.6 2006/06/18 19:53:25 61.927 -150.355 57.4 SOUTHERN ALASKA
MAP 3.5 2006/06/18 18:54:30 51.936 177.106 5.0 RAT ISLANDS, ALEUTIAN ISLANDS, ALASKA
MAP 5.0 2006/06/18 18:37:52 53.314 -160.676 10.9 SOUTH OF ALASKA
MAP 4.0 2006/06/18 18:16:50 51.930 176.944 1.0 RAT ISLANDS, ALEUTIAN ISLANDS, ALASKA
MAP 3.8 2006/06/18 17:39:47 52.124 176.763 1.0 RAT ISLANDS, ALEUTIAN ISLANDS, ALASKA
MAP 4.0 2006/06/18 14:58:04 52.062 177.287 50.0 RAT ISLANDS, ALEUTIAN ISLANDS, ALASKA
MAP 2.7 2006/06/18 13:50:29 53.725 -163.732 25.0 UNIMAK ISLAND REGION, ALASKA
MAP 2.5 2006/06/18 13:36:57 61.736 -147.994 1.0 SOUTHERN ALASKA
MAP 4.3 2006/06/18 10:15:25 52.035 177.097 40.0 RAT ISLANDS, ALEUTIAN ISLANDS, ALASKA
MAP 3.8 2006/06/18 06:31:48 51.830 176.953 1.0 RAT ISLANDS, ALEUTIAN ISLANDS, ALASKA
MAP 2.8 2006/06/18 06:11:05 60.079 -152.760 100.0 SOUTHERN ALASKA
MAP 3.6 2006/06/18 06:07:44 52.035 177.097 10.0 RAT ISLANDS, ALEUTIAN ISLANDS, ALASKA
MAP 3.3 2006/06/18 04:47:17 58.183 -154.772 200.0 ALASKA PENINSULA
MAP 4.3 2006/06/18 02:44:08 51.830 176.953 1.0 RAT ISLANDS, ALEUTIAN ISLANDS, ALASKA
MAP 2.5 2006/06/18 02:08:57 61.546 -146.116 1.0 SOUTHERN ALASKA
MAP 3.4 2006/06/17 21:51:55 51.936 177.106 10.0 RAT ISLANDS, ALEUTIAN ISLANDS, ALASKA
MAP 2.7 2006/06/17 20:24:55 51.955 177.754 20.0 RAT ISLANDS, ALEUTIAN ISLANDS, ALASKA
MAP 3.5 2006/06/17 19:11:56 52.041 177.259 15.0 RAT ISLANDS, ALEUTIAN ISLANDS, ALASKA
MAP 3.3 2006/06/17 18:11:17 52.035 177.097 5.0 RAT ISLANDS, ALEUTIAN ISLANDS, ALASKA
MAP 3.6 2006/06/17 14:40:01 51.936 177.106 5.0 RAT ISLANDS, ALEUTIAN ISLANDS, ALASKA
MAP 3.9 2006/06/17 11:46:56 51.855 177.761 15.0 RAT ISLANDS, ALEUTIAN ISLANDS, ALASKA
MAP 3.4 2006/06/17 10:26:00 51.736 177.123 5.0 RAT ISLANDS, ALEUTIAN ISLANDS, ALASKA
MAP 4.3 2006/06/17 10:00:15 51.756 176.922 6.4 RAT ISLANDS, ALEUTIAN ISLANDS, ALASKA
MAP 2.6 2006/06/17 09:49:59 56.668 -155.904 60.0 ALASKA PENINSULA
MAP 3.2 2006/06/17 06:59:49 51.855 177.761 20.0 RAT ISLANDS, ALEUTIAN ISLANDS, ALASKA
MAP 3.6 2006/06/17 06:54:39 51.830 176.953 1.0 RAT ISLANDS, ALEUTIAN ISLANDS, ALASKA
MAP 2.9 2006/06/17 05:26:34 51.868 178.246 20.0 RAT ISLANDS, ALEUTIAN ISLANDS, ALASKA
MAP 3.0 2006/06/17 04:31:29 51.860 177.923 20.0 RAT ISLANDS, ALEUTIAN ISLANDS, ALASKA
MAP 2.9 2006/06/17 03:55:31 60.171 -154.284 160.0 SOUTHERN ALASKA
MAP 3.5 2006/06/16 23:28:11 51.936 177.106 10.0 RAT ISLANDS, ALEUTIAN ISLANDS, ALASKA
MAP 3.0 2006/06/16 22:44:39 51.868 178.246 20.0 RAT ISLANDS, ALEUTIAN ISLANDS, ALASKA
MAP 4.0 2006/06/16 21:47:38 52.431 173.692 57.4 NEAR ISLANDS, ALEUTIAN ISLANDS, ALASKA
MAP 3.9 2006/06/16 20:54:28 51.830 176.953 1.0 RAT ISLANDS, ALEUTIAN ISLANDS, ALASKA
MAP 3.1 2006/06/16 20:05:14 51.864 178.084 20.0 RAT ISLANDS, ALEUTIAN ISLANDS, ALASKA
MAP 3.6 2006/06/16 19:59:56 51.830 176.953 1.0 RAT ISLANDS, ALEUTIAN ISLANDS, ALASKA
MAP 3.3 2006/06/16 16:47:54 51.851 177.599 15.0 RAT ISLANDS, ALEUTIAN ISLANDS, ALASKA
MAP 3.3 2006/06/16 16:34:58 51.936 177.106 1.0 RAT ISLANDS, ALEUTIAN ISLANDS, ALASKA
MAP 2.8 2006/06/16 14:47:27 51.414 -174.508 90.0 ANDREANOF ISLANDS, ALEUTIAN IS., ALASKA
MAP 3.0 2006/06/16 14:26:47 53.700 -163.805 15.0 UNIMAK ISLAND REGION, ALASKA
MAP 2.9 2006/06/16 13:19:53 51.672 178.419 1.0 RAT ISLANDS, ALEUTIAN ISLANDS, ALASKA
MAP 3.6 2006/06/16 13:08:12 51.830 176.953 1.0 RAT ISLANDS, ALEUTIAN ISLANDS, ALASKA
MAP 2.5 2006/06/16 10:24:50 51.868 178.246 25.0 RAT ISLANDS, ALEUTIAN ISLANDS, ALASKA
MAP 3.2 2006/06/16 10:03:05 51.972 176.849 15.0 RAT ISLANDS, ALEUTIAN ISLANDS, ALASKA
MAP 3.0 2006/06/16 09:34:21 51.875 178.570 10.0 RAT ISLANDS, ALEUTIAN ISLANDS, ALASKA
MAP 3.1 2006/06/16 09:20:51 51.830 176.953 1.0 RAT ISLANDS, ALEUTIAN ISLANDS, ALASKA
MAP 3.2 2006/06/16 08:02:02 51.914 177.047 4.7 RAT ISLANDS, ALEUTIAN ISLANDS, ALASKA
MAP 3.1 2006/06/16 07:47:46 51.368 178.276 1.0 RAT ISLANDS, ALEUTIAN ISLANDS, ALASKA
MAP 3.6 2006/06/16 07:24:48 51.504 -163.172 40.0 SOUTH OF ALASKA
MAP 3.1 2006/06/16 07:07:31 51.175 178.607 20.0 RAT ISLANDS, ALEUTIAN ISLANDS, ALASKA
MAP 3.3 2006/06/16 05:33:55 60.079 -152.760 100.0 SOUTHERN ALASKA
MAP 3.6 2006/06/16 05:32:33 51.936 177.106 5.0 RAT ISLANDS, ALEUTIAN ISLANDS, ALASKA
MAP 4.0 2006/06/16 04:25:12 52.289 174.175 50.0 NEAR ISLANDS, ALEUTIAN ISLANDS, ALASKA
MAP 3.3 2006/06/16 03:54:46 52.035 177.097 5.0 RAT ISLANDS, ALEUTIAN ISLANDS, ALASKA