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Entries in Montana earthquakes (8)


Another small quake shakes NW Montana

USGS map shows extent of quake's projected "shake" (LIBBY)- Another small earthquake shakes Northwest Montana, the second time in less than a month that the Libby area has felt the earth move.

The US Geological Survey reports the magnitude 3.5 quake hit just before 7 o'clock Tuesday evening. Preliminary indications were that the quake's epicenter was 27-miles southeast of Libby, 39-miles west of Kalispell. That would put it close to Happy's Inn and not far from the Thompson Lakes. 

The quake was quite shallow, just over 1-mile below the surface. 

That puts it in the same general area as a 2.5 quake that happened on May 3rd. 


Moderate quake felt in Western Montana 

USGS map(LINCOLN)- The U.S. Geologicial Survey says a small quake that shook the earth near Lincoln this morning registered a magnitude of 3.5.

The Montana Bureau of Mines and Geology recorded the quake at 8:41 this morning 4-miles east southeast of Lincoln. That puts the epicenter 35-miles northwest of Helena in Lewis and Clark County. 

The quake was at moderate depth of 9-point-9 miles beneath the surface. 

Geologists are still checking into the quake but say it may have been felt around Helena and as far west as Seeley Lake. 


Quake hits near Seeley Lake

USGS map shows quake's epicenter NE of Seeley Lake(SEELEY LAKE)- A relatively strong quake rumbled underneath the Bob Marshall Wilderness late Sunday night. 

According to the initial computer-generated data, the quake measured a magnitude 3.2 and was centered between Alloy and Black Mountain, which is 21-miles northeast of Seeley Lake. That’s along the headwaters of the South Fork of the Flathead in a very remote area.

The quake happened just a few minutes after 10 p.m. and was quite deep, just over 9-miles beneath the surface of the Earth.

A handful of people reported to the U.S. Geological Survey that they had felt the quake in the Seeley Lake area, with another report coming in from Ovando, which is about 24-miles from the epicenter.

The quake was the first sizable quake in Western Montana since last winter. 


Small quake recorded near Ovando

(OVANDO)- It doesn’t look like anyone reported feeling the shake, but a small earthquake did rattle the Upper Blackfoot Valley early Monday morning.

The U.S. Geological Survey reports the quake, which initially measured a 2.8 magnitude, happened just after 1:22 a.m. Monday morning with the epicenter about 10-miles east of Ovando. The quake was fairly deep at 8.3-miles, which likely limited how noticeable the event would have been, especially at that time of the day.

The U.S.G.S. site doesn’t show anyone reporting they felt the quake, which is another example of the regular seismic activity Western Montana is known for. 


Small quake rumbles under Seeley Lake

(SEELEY LAKE)- It wasn't strong enough for people to notice, but a small quake near Seeley Lake Monday proves once more how seismically active Western Montana can be.

KPAX TV reports this latest quake registered 1.3 magnitude and happened just after midnight. The epicenter was about 24-miles northeast of Seeley Lake in the Bob Marshall Wilderness area. The U.S.G.S. says the quake was fairly shallow and close to the surface. 

It was just three weeks ago that the last noticible quake hit the area, a 3.2 magnitude shake near Clinton, where a series of quakes have been recorded since last September.