Something Stirring at Mount Saint Helens - 2/14/1011

Magnitude
2.0
Date-Time
Saturday, February 26, 2011 at 13:08:15 UTC
Saturday, February 26, 2011 at 05:08:15 AM at epicenter
Time of Earthquake in other Time Zones
Location
46.200°N, 122.189°W
Depth
2.1 km (1.3 miles) set by location program
Region
MOUNT ST. HELENS AREA, WASHINGTON
Distances
1 km (0 miles) W (270°) from Mount St. Helens Volcano, WA
39 km (24 miles) NNE (33°) from Amboy, WA
40 km (25 miles) S (170°) from Morton, WA
59 km (37 miles) E (84°) from Longview, WA
71 km (44 miles) NNE (27°) from Vancouver, WA
Location Uncertainty
horizontal +/- 0.2 km (0.1 miles); depth fixed by location program
Parameters
NST= 10, Nph= 10, Dmin=0 km, Rmss=0.05 sec, Gp= 90°,
M-type=duration magnitude (Md), Version=0
Source
Pacific Northwest Seismograph Network
Event ID
uw02261308

You beat me to it!

I am getting a bit frustrated in trying to find a comprehensive list on all the quakes at Helen's, just so far this year.

I actually had to go back through this thread and cut/past the older quakes to get a better list. Here are the quakes listed fromt he USGS: (since this started on the 14th)

SOURCE



MAP 2.3 2011/02/14 20:21:42 46.278 -122.216 4.7 9 km ( 6 mi) NNW of Mount St. Helens Volcano, WA
MAP 1.1 2011/02/14 19:54:51 46.274 -122.215 2.8 9 km ( 5 mi) NNW of Mount St. Helens Volcano, WA
MAP 2.3 2011/02/14 19:35:08 46.285 -122.216 5.4 10 km ( 6 mi) NNW of Mount St. Helens Volcano, WA
MAP 1.1 2011/02/14 19:12:06 46.276 -122.211 3.8 9 km ( 5 mi) NNW of Mount St. Helens Volcano, WA
MAP 1.3 2011/02/14 19:01:25 46.279 -122.212 4.9 9 km ( 6 mi) NNW of Mount St. Helens Volcano, WA
MAP 1.3 2011/02/14 18:54:06 46.285 -122.213 6.0 10 km ( 6 mi) NNW of Mount St. Helens Volcano, WA
MAP 1.2 2011/02/14 18:47:55 46.279 -122.208 4.6 9 km ( 6 mi) NNW of Mount St. Helens Volcano, WA
MAP 2.8 2011/02/14 18:37:45 46.280 -122.209 4.5 9 km ( 6 mi) NNW of Mount St. Helens Volcano, WA
MAP 4.3 2011/02/14 18:35:25 46.282 -122.212 5.5 9 km ( 6 mi) NNW of Mount St. Helens Volcano, WA
MAP 2.2 2011/02/15 19:53:54 46.303 -122.182 10.5 11 km ( 7 mi) N of Mount St. Helens Volcano, WA
MAP 1.8 2011/02/16 20:02:07 46.278 -122.213 4.6 9 km ( 6 mi) NNW of Mount St. Helens Volcano, WA
MAP 2.4 2011/02/17 20:07:19 46.283 -122.225 1.4 10 km ( 6 mi) NNW of Mount St. Helens Volcano, WA
MAP 2.4 2011/02/17 20:07:19 46.283 -122.225 1.4 10 km ( 6 mi) NNW of Mount St. Helens Volcano, WA
MAP 2.5 2011/02/17 10:55:04 46.279 -122.215 6.3 9 km ( 6 mi) NNW of Mount St. Helens Volcano, WA
MAP 1.3 2011/02/18 08:08:07 46.280 -122.210 3.9 9 km ( 6 mi) NNW of Mount St. Helens Volcano, WA
MAP 2.5 2011/02/19 21:59:31 46.278 -122.220 3.2 9 km ( 6 mi) NNW of Mount St. Helens Volcano, WA
MAP 2.0 2011/02/20 02:28:54 46.203 -122.186 1.5 1 km ( 0 mi) NW of Mount St. Helens Volcano, WA
MAP 1.9 2011/02/24 22:23:56 46.290 -122.221 0.0 10 km ( 6 mi) NNW of Mount St. Helens Volcano, WA
MAP 1.0 2011/02/24 14:41:00 46.282 -122.205 3.0 9 km ( 6 mi) NNW of Mount St. Helens Volcano, WA
MAP 2.0 2011/02/26 13:08:15 46.200 -122.189 2.1 1 km ( 0 mi) W of Mount St. Helens Volcano, WA


Now here are the smaller quakes listed on the PNSN website. This is not complete however, because they only list the quakes in located ON the mountain, not in the seismic zone where the swarm is. I will try and do a long/lat search on USGS later.


DATE-(UTC)-TIME LAT(N) LON(W) DEP MAG QUAL COMMENTS
yy/mm/dd hh:mm:ss deg. deg. km Ml
11/01/25 07:21:48 46.19N 122.17W 6.4-0.4 AD
11/01/25 22:07:24 46.20N 122.16W 4.5-0.5 AD
11/01/25 23:41:20 46.19N 122.19W 2.3 1.9 AA
11/01/26 15:33:10 46.19N 122.18W 2.8-0.3 AA
11/01/27 09:56:34 46.21N 122.19W 5.0-1.1 AB
11/01/27 13:27:00 46.19N 122.18W 4.1-0.1 AA
11/01/27 13:38:44 46.19N 122.18W 4.3-0.9 AA
11/01/29 02:01:29 46.19N 122.17W 6.5 0.6 AC
11/01/31 17:40:45 46.20N 122.18W 2.5 0.8 AA
11/01/31 17:48:05 46.20N 122.18W 3.5-0.5 AA
11/01/31 20:05:28 46.19N 122.18W 1.7 1.1 AA
11/02/06 20:44:28 46.19N 122.17W 4.8-0.9 AC
11/02/10 20:24:30 46.19N 122.18W 0.0 0.4 AC
11/02/16 10:47:53 46.20N 122.18W 3.2-0.8 AC
11/02/20 02:18:23 46.20N 122.18W 3.5-1.3 AA
11/02/20 02:21:58 46.19N 122.19W 3.3-0.9 AB
11/02/20 02:28:54 46.19N 122.18W 3.5-0.5 AA
11/02/20 08:00:00 46.19N 122.19W 2.4 0.6 AA
11/02/20 11:33:08 46.19N 122.19W 3.9-0.4 AA
11/02/20 15:45:02 46.20N 122.17W 3.4-0.8 AD
11/02/21 07:04:06 46.20N 122.18W 0.2-0.1 AC
11/02/21 16:46:03 46.19N 122.19W 0.0 0.1 AC


SOURCE



So as you can see, this is in no way over. The seismic zone is still very active. Call it a swarm, or after-shocks...I don't know what the prefessionals are calling it.

Hi all,just wanted to ask a question. Been watching usgs 2.5 +worldwide for last few day and the majority of the quakes have been relativily shallow,is that normal?

reply to post by yahfearing


As crazy as that post without paragraphs or pauses sounds, when you look at a map and you consider the continental drift theory, it actually looks plausible that North America could split along the Mississippi from New Orleans, up through the Great Lakes and over through Canada.

I know it is a bit away from Mount Saint Helens, but anything in your region always gets me thinking.

This event has been reviewed by a seismologist.
Magnitude 4.0
Date-Time Thursday, March 03, 2011 at 03:55:05 UTC
Wednesday, March 02, 2011 at 07:55:05 PM at epicenter
Time of Earthquake in other Time Zones

Location 50.417°N, 129.914°W
Depth 10 km (6.2 miles)
Region VANCOUVER ISLAND, CANADA REGION

earthquake.usgs.gov...

Alright folks... I'm posting this in a few different threads, as I believe it is relevant and important to share. So if you see it here, and then another, you were warned. LOL

Westcoast... I love your threads and follow them closely. I thought this would be beneficial to add here. If you would like to post it in your Washington thread, please do.

It is published in the journal Nature dated 3 March 2011. A magma chamber is a large reservoir of molten rock (magma) located several kilometers beneath a volcano, which it feeds with magma. But what happens to the magma chamber when the volcano is not erupting? According to volcanologists, it cools down to an extremely viscous mush until fresh magma from deep inside Earth 'reawakens' it, in other words fluidizes it by heating it through thermal contact. The large size of magma chambers (ranging from a few tenths to a few hundred cubic kilometers) explains why, according to this theory, it takes several hundred or even thousand years for the heat to spread to the whole reservoir, awakening the volcano from its dormant state.

However, according to the mathematical model developed by Burgisser and his US colleague, reheating takes place in three stages. When fresh hot magma rises from below and arrives beneath the chamber, it melts the viscous magma at the base of the reservoir. This freshly molten magma therefore becomes less dense and starts to rise through the chamber, forcing the rest of the viscous mush to mix. It is this mixing process that enables the heat to spread through the chamber a hundred times faster than volcanologists had predicted. Depending on the size of the chamber and the viscosity of the magma it contains, a few months may be sufficient to rekindle its activity.

No Such Thing As A Dormant Volcano Article

reply to post by UtahRosebud


Wow...very interesting. Thank you for posting, and I will definately put it on the washington thread. This ties in nicely with what I think and apply a lot of my logic to. Thanks!!!

Was that just a complete random post? I don't think if St Helens blows it's going to be the end of times..
Yeah...

reply to post by yahfearing1


As I stated on another thread - off topic and fearmongering. Your wasting your time going from thread to thread - please go away!